MICROHARD PMDDL2350 (01) PDF Document

The default IP address for the LAN is 192.168.168.1 for the MICROHARD PMDDL2350.

The default username is admin, the default password is admin. You will be prompted to change the password as soon as you login using the default on the MICROHARD PMDDL2350.

If you are logged into the MICROHARD PMDDL2350 navigate to the System > Maintenance Tab. If you cannot log in, power on the MICROHARD PMDDL2350 and wait until the modem complete the boot up process. Press and hold the Config button for 8 seconds to reset to a factory default Master.

In addition to the basic serial port settings, the IP Protocol Config has to be configured. Refer to the COM0/1 Configuration pages for a description of the different options for the MICROHARD PMDDL2350.

This example requires two MICROHARD PMDDL2350 units: one configured as a Master (M) and the second as a Slave/Remote (S). This will use factory defaults to set up each unit for a simple network.

1. Use the Getting Started instructions to power up a pair of MICROHARD PMDDL2350 modules mounted in a Pico Ethernet Motherboard.

2. Master: Once the MICROHARD PMDDL2350 is fully booted (solid blue CPU LED), press and hold the CFG button. Once the CPU LED begins to flash, continue to hold for at least 10 seconds, then release.

3. The MICROHARD PMDDL2350 will then reset all settings to default values, and set the following settings that are required to automatically create a link with a slave:

• IP Address: 192.168.168.1, Operating Mode: Master
• Network ID: pMDDL, Channel Bandwidth: 8 MHz
• Channel-Frequency: 76 – 2477 MHz

4. Slave: Ensure the MICROHARD PMDDL2350 is fully booted (solid blue CPU LED), then press and hold the CFG button. Once the CPU LED begins to flash, continue to hold for 5 seconds, then release.

5. The MICROHARD PMDDL2350 will then reset all settings to default values, and set the following settings that are required to automatically create a link with a slave:

• IP Address: 192.168.168.2, Operating Mode: Slave
• Network ID: pMDDL, Channel Bandwidth: 8 MHz
• Channel-Frequency: 76 – 2477 MHz

6. Once both units have finished changing settings (~60 seconds) a wireless link should automatically be established between them, this can be seen by observing the RSSI LEDS, they should be on solid, indicating a link (the more LEDs illuminated = stronger the link).

For optimal performance, it is important to include adequate heat dissipation strategies that incorporate a heat sink or fan into any designs that integrate the MICROHARD PMDDL2350 OEM module (also required for designs that utilize the optional socket).

Two recommended heat dissipation strategies are:

1. Heat Sink (w/Thermal Gap Filler)

• Heat Sink – Wakefield-Vette 625-25ABT4E* (25mm x 25mm x 6.4mm (Fin height), 120 C/W @ 500 LFM, 5.45 grams)
• Thermal Gap Filler – Laird Technologies Tflex HR600* (25mm x 25 mm (Cut to Size), 5mm Thickness, 3.0 W/m-K, 5 grams)
• pMDDL OEM or OEM/Socket

*Or equivalent

2. Fan (Requires power source)

• External Fan – Sunon MC25100V1-000U-A99* (25mm x 25mm x 10mm, 3.5 CFM (0.099m3/min), 13,000 RPM, 2.5~6VDC, 7.71 grams)
• pMDDL OEM or OEM/Socket

*Or equivalent

1. Use the Getting Started instructions to connect, power up and log in to a MICROHARD PMDDL2350 unit.

2. Give the MICROHARD PMDDL2350 unit a unique IP address.

• Select Network from the top/main navigation.
• Select LAN from the submenu list. Select Edit on the LAN interface 1.
• Choose Static IP for the Connection Type.
• Enter the following Network Information:
  • IP Address: 192.168.168.11
  • IP Subnet Mask: 255.255.255.0
• Click on the Submit button to write the changes to the MICROHARD PMDDL2350. The Cancel button will revert back to last values saved to the unit.
• Once the IP Address is changed, you will need to type the new address into your browser to continue the configuration.

3. Configure the MICROHARD PMDDL2350 as a Master.

• Select Wireless from the top/main navigation, and then RF from the submenu list.
• In the RF Configuration ensure the Compatibility Mode, Channel Bandwidth and Channel-Frequency are set the same on each module.
• For bench or close proximity testing it is best to use a lower power setting to prevent RF saturation. Select 20dBm from the TX Power setting.
• Select Master from the Operation Mode dropdown box.
• Set a Network ID, which will need to be the same on each unit in the network. This example uses TEST_ID.
• The remaining settings in the Wireless menu should be left as defaults for this exercise.
• Click on the Submit button to write the changes to the MICROHARD PMDDL2350. The Cancel button will revert back to previously saved values.

The following procedure describes the steps required to set up a MICROHARD PMDDL2350 unit as a Slave (S). A Slave provides a single wireless connection (i.e to an Master) and provides a wired connection to a PC or other devices.

1. Use the Getting Started instructions to connect, power up and log in to a second MICROHARD PMDDL2350 unit.

2. Give the MICROHARD PMDDL2350 unit a unique IP address.

• Select Network from the top/main navigation.
• Select LAN from the submenu list. Select Edit on the LAN interface 1.
• Choose Static IP for the Connection Type.
• Enter the following Network Information:
  • IP Address: 192.168.168.12
  • IP Subnet Mask: 255.255.255.0
  • Default Gateway: 192.168.168.11
• Click on the Submit button to write the changes to the MICROHARD PMDDL2350. The Cancel button will revert back to last values saved to the unit.
• Once the IP Address is changed, you will need to type the new address into your browser to continue the configuration.

3. Configure the MICROHARD PMDDL2350 as a Slave.

• Select Wireless from the top/main navigation, and then RF from the submenu list.
• In the RF Configuration ensure the Compatibility Mode, Channel Bandwidth and Channel-Frequency are set the same on each module.
• For bench or close proximity testing it is best to use a lower power setting to prevent RF saturation. Select 20dBm from the TX Power setting.
• Select Slave from the Operating Mode dropdown box.
• Set a Network ID, which will need to be the same on each unit in the network. This example uses TEST_ID.
• The remaining settings in the Wireless menu should be left as defaults for this exercise.
• Click on the Submit button to write the changes to the MICROHARD PMDDL2350. The Cancel button will revert back to previously saved values.

1. Visually check to see if the MICROHARD PMDDL2350 units are communicating.

• The RSSI LED’s represent signal strength, the more LED’s that are illuminated, the stronger the signal. The Wireless > Status window has a Connection Status section similar to that seen below:

2. With a PC connected to the Master (M), type in the IP address of the Slave (S) into the URL address bar of your browser. You should be able to connect, log in and view the WebUI of the Slave via the wireless connection.

• Open a browser and type in the address of the slave: 192.168.168.12
• Log into the unit.
• The System Summary screen should be displayed.

The MICROHARD PMDDL2350 OEM modules must be baked before mounting. The following baking instruction should be followed for the best results:

a) Minimum of 8 to 12 hours at 125°C +/- 5°C for high-temperature device containers.

b) Unused modules should be stored at ≤ 10% RH

The MICROHARD PMDDL2350 can be set to operate as a USB Device. When set as a USB device, Microhard Composite Drivers can be installed on a USB Host to provide Ethernet and Serial functionality to the USB port on the MICROHARD PMDDL2350. To enable USB Device mode, Pin 14 must be connect to GND through a 1K resistor as shown below:

1kΩ resistor connects Pin 14 (USB Mode) to GND.

The Config button on the MICROHARD PMDDL2350 can be used to either reset the modem into its factory default configuration, or it can be used to perform a firmware recovery procedure.

Factory Default Settings: While power is applied and the MICROHARD PMDDL2350 in an operational state, press and hold the Config Button for more than 10 seconds to reset to a factory default Master, alternatively hold the button for 5 seconds for a factory default Slave.

Firmware Recovery: To load the firmware on the unit it is recommended to use the normal WebUI to perform a firmware update (Maintenance). In the event that the firmware cannot be loaded using the standard WebUI (non responsive unit), pressing and holding the Config Button while powering-up the module will force the MICROHARD PMDDL2350 into a firmware recovery mode. There are 3 main modes, HTTP, TFTP and Master Reset. The table below shows the time required to hold the Config button while power is applied:

Timing for CFG Button Hold:

0 to 5 seconds: HTTP Recovery

5 to 10 seconds: TFTP Recovery

10 to 15 seconds: Master Reset

15+ seconds: No Effect

• HTTP Recovery: Set an IP on a PC to 192.168.1.1. Open a web browser and Navigate to 192.168.1.39. This will open a simple webpage which will allow a firmware file to be loaded.
• TFTP Recovery: Set an IP on a PC to 192.168.1.1. Use a TFTP session to push the firmware file to the modems recovery IP of 192.168.1.39.
• Master Reset: Runs Master Reset, file system is erased.

In the event that your MICROHARD PMDDL2350 unit becomes unresponsive it may be required to perform a firmware recovery procedure outlined below:

1. Download and save firmware file in a local folder, for example C:\;

2. Separate the PC from the network and set IP to static:

192.168.1.1

255.255.255.0

3. Connect PC Ethernet port to the Ethernet port of the modem to be recovered

4. Start a ping on the PC

C:\>ping 192.168.1.39 -t

Pinging 192.168.1.39 with 32 bytes of data:

Request timed out.

Request timed out.

5. Power cycle modem while pressing and holding CFG (Config) button;

6. Release the CFG button when ping responded:

C:\>ping 192.168.1.39 -t

Pinging 192.168.1.39 with 32 bytes of data:

Request timed out.

Request timed out.

Request timed out.

Reply from 192.168.1.39: bytes=32 time<1ms TTL=128

Reply from 192.168.1.39: bytes=32 time<1ms TTL=128

Reply from 192.168.1.39: bytes=32 time<1ms TTL=128

Reply from 192.168.1.39: bytes=32 time<1ms TTL=128

Note, If ping responds as shown above, then you can probably recover the unit, please proceed. Otherwise, send the unit back for RMA.

7. Now use TFTP to push firmware file into the corrupted unit:

For example, on Windows 7 using following command line:

tftp -i 192.168.1.39 put pMDDL-v1_3_0-r1005.bin (use the filename saved).

8. Wait until above command to successfully transferred the image, similar message should show

Transfer successful: xxxxxxx bytes in 5 seconds, nnnnnnn bytes/s, note the number might change for different firmware file

Note, if you see message above, the unit will re-flash itself and reboot, otherwise call for help or send back for RMA.

9. Wait for the unit to recover and reboot.

Initial configuration of a MICROHARD PMDDL2350 using the Web User (Browser) Interface (Web UI) method involves the following steps:

• configure a static IP Address on your PC to match the default subnet or if your PC is configured for DHCP, simply connect a PC to the LAN port of the MICROHARD PMDDL2350 and it will be assigned a IP address automatically.
• connect the MICROHARD PMDDL2350 LAN port to PC NIC card using an Ethernet cable
• apply power to the MICROHARD PMDDL2350 and wait approximately 60 seconds for the system to load
• open a web browser and enter the factory default IP address (192.168.168.1) of the unit:
• logon window appears; log on using default Username: admin Password: admin
• use the web browser based user interface to configure the MICROHARD PMDDL2350 as required.

The factory default network settings are: IP: 192.168.168.1, Subnet: 255.255.255.0

The LAN Ethernet port(s) on the MICROHARD PMDDL2350 are for connection of devices on a local network. By default, this port has a static IP Address. It also, by default is running a DHCP server to provide IP Addresses to devices that are connected to the physical LAN port (directly or via a switch).

To configure the LAN interface, select the Add or Edit buttons in the LAN menu.

Spanning Tree (STP)

This option allows the MICROHARD PMDDL2350 to participate in the Spanning Tree protocol with other devices to prevent local loops. By default, this is disabled. Values are Off/On.

IGMP Snooping

Enable or disable IGMP snooping on the MICROHARD PMDDL2350. IGMP snooping is the process of listening to Internet Group Management Protocol traffic. This allows the MICROHARD PMDDL2350 to listen in on the IGMP conversations between network devices. The MICROHARD PMDDL2350 then maintains a map of which links need which IP multicast streams. Values are On/Off.

Connection Type

This selection determines if the MICROHARD PMDDL2350 will obtain an IP address from a DHCP server on the attached network, or if a static IP address will be entered. If a Static IP Address is chosen, the fields that follow must also be populated. Values are DHCP/Static.

IP Address

If ‘Static’ Connection Type is selected, a valid IPv4 Address for the network being used must be entered in the field. If ‘DHCP’ is chosen this field will not appear and it will be populated automatically from the DHCP server. Default is 192.168.168.1.

Netmask

If ‘Static’ Connection Type is selected, the Network Mask must be entered for the Network. If ‘DHCP’ is chosen this field will not appear and it will be populated automatically from the DHCP server. Default is 255.255.255.0.

Default Gateway

If the MICROHARD PMDDL2350 is integrated into a network which has a defined gateway, then, as with other hosts on the network, this gateway’s IP address will be entered into this field. If there is a DHCP server on the network, and the Connection Type is selected to be DHCP, the DHCP server will populate this field with the appropriate gateway address. Default is (no default).

DNS

Set the DNS (Domain Name Server) for use by devices on the LAN port, if required. Default is (no default).

The DHCP service can be configured to provide dynamic host control protocol (DHCP) service to all attached (either wired or wireless devices). The LAN DHCP service is available for each interface, and is located in the add/edit interface menus.

DHCP Server

The option is used to enable or disable the DHCP service for devices connected to the LAN Port(s). Values are Enable/Disable.

Start

Select the starting address DHCP assignable IP Addresses. The first octets of the subnet will be pre-set based on the LAN IP configuration, and can not be changed. Default is 192.168.168.100.

Limit

Set the maximum number of IP addresses that can be assigned by the MICROHARD PMDDL2350. Default is 150.

Lease Time

The DHCP lease time is the amount of time before a new request for a network address must be made to the DHCP Server. Default is 720 (minutes).

Alternate Gateway

Specify an alternate gateway for DHCP assigned devices if the default gateway is not to be used. Value is (IP Address).

Preferred DNS Server

Specify a preferred DNS server address to be assigned to DHCP devices. Value is (IP Address).

Alternate DNS Server

Specify the alternate DNS server address to be assigned to DHCP devices. Value is (IP Address).

Domain Name

Enter the Domain Name for the DHCP devices. Value is (string).

WINS/NBNS Servers

Enter the address of the WINS/NBNS (NetBIOS) Server. The WINS server will translate computers names into their IP addresses, similar to how a DNS server translates domain names to IP addresses. Default is (no default).

WINS/NBT Node Type

Select the method used to resolve computer names to IP addresses. Four name resolution methods are available:

• B-node: broadcast
• P-node: point-to-point
• M-node: mixed/modified
• H-node: hybrid

Values are none/b-node/p-node/m-node/h-node.

The Static IP Addresses (for DHCP Server) feature allows MAC binding to allow connected devices to automatically obtain a specific IP address. For configuration of the LAN DHCP Service see Network > LAN > (Edit) > LAN DHCP.

Static Addresses

Displays the MAC Binding table that is configured in the MICROHARD PMDDL2350 device.

Active DHCP Leases

Displays the active DHCP leases for any IP Addresses that have been assigned. This includes the IP address, the MAC, Device Name as well as the lease expiry.

It may be desirable to have devices on different subnets to be able to talk to one another. This can be accomplished by specifying a static route, telling the MICROHARD PMDDL2350 where to send data.

Name

Routes can be named for easy reference, or to describe the route being added. Value is (no default).

Destination

Enter the network IP address for the destination. Value is (IP Address) (192.168.168.0).

Gateway

Specify the Gateway used to reach the network specified above. Value is (IP Address) 192.168.168.1.

Netmask

Enter the Netmask for the destination network. Value is (IP Address) 255.255.255.0.

Metric

In some cases there may be multiple routes to reach a destination. The Metric can be set to give certain routes priority, the lower the metric is, the better the route. The more hops it takes to get to a destination, the higher the metric. Value is 0 (Integer).

Interface

Define the exit interface. Is the destination a device on the LAN, LAN1 (If physical WAN port is bridged as an independent LAN), or the WAN? Values are LAN / LAN1 / WAN / USB / None.

The Network > Ports menu can be used to determine the characteristics of the physical Ethernet interfaces on the MICROHARD PMDDL2350. The Mode (Auto/Manual), Auto-Negotiation, Speed (10/100Mbit/s) and the Duplex (Full/Half) can all be configured on the MICROHARD PMDDL2350.

Mode

If set to Auto, the MICROHARD PMDDL2350 will negotiate and determine the best connection speed and mode. Values are Auto / Manual.

Auto-Negotiation

Enable or disable auto-negotiation. Values are On / Off.

Speed

If the mode and auto negotiation are set you manual the connection speed can be specified. Values are 100Mbit/s / 10 Mbit/s.

Duplex

Selection between full or half duplex for the direction of data. Values are Full / Half.

The Network > Device List shows the current ARP table for the local network adapter. The MAC address and IP address are shown, however not only DHCP assigned devices are listed in the device list, any devices, even those statically assigned, that are connected through the local network interface (s) are displayed, including those connected through a hub or switch.

Devices can also be filtered by the network that they are attached to. Devices with a MAC and no IP and vise versa can also be filtered.

The RF Configuration allows for the configuration of the radio module. You can turn the radio on or off, adjust the TX power, select the channel bandwidth and frequency, as well as the operating mode of the radio.

Radio On/Off

This option is used to turn the radio module on or off. If turned off Wireless connections can not be made. The default is On. Values are On / Off.

Channel Bandwidth

Select the channel bandwidth from the list. Generally a larger channel has greater throughput, at the cost of sensitivity, while a smaller channel tends to be more robust, but at the cost of throughput. Values are 8 / 4 MHz.

Channel-Frequency

Set the Channel-Frequency. This must be the same on each unit in a network. The frequency shown is the center frequency and is available in 1 MHz increments, values shown will vary with the Channel Bandwidth selected above. The noise floor of the specified channel will dramatically affect the quality of the link, it is essential to select the cleanest channel for superior performance. Values are pMDDL2350: 2304 – 2390 MHz.

TX Power

This setting establishes the transmit power level which will be presented to the antenna connector(s) of the MICROHARD PMDDL2350. Unless required, the Tx Power should be set not for maximum, but rather for the minimum value required to maintain an adequate system fade margin. TX Power reflects the Total RF power for the MICROHARD PMDDL2350. In MIMO mode this means that the total RF power is split between antenna interfaces. When MIMO is disabled a total of 30 dBM can be presented to the ANT 1 Antenna. Values (in dBm) are 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30.

Wireless Distance

The Wireless Distance parameter allows a user to set the expected distance the wireless signal needs to travel. The MICROHARD PMDDL2350 sets various internal timeouts to account for this travel time. Longer distances will require a higher setting, and shorter distances may perform better if the setting is reduced. Value is 3000 (meters).

TX Antenna Chains / RX Antenna Chains

The MICROHARD PMDDL2350 can be configured to operate in MIMO Mode (TX and RX chains both use ANT1 + ANT2). You can also disable the MIMO functionality and TX on only ANT1. Valid Combinations are: TX Chains 1 + 2 / RX Chains 1 + 2 OR TX Chains 1 / RX Chains 1 + 2 OR TX Chains 1 / RX Chains 1. Values are 1 + 2 / 1.

EM Interference

The EM Interference parameter is used to control the maximum transmission length in order to mitigate surrounding EM interference (EMI). Values are Normal / High.

Operating Mode

Select the operating mode of the MICROHARD PMDDL2350. Options are Master, Slave, Repeater (Future), Mesh. Values are Master/Slave/Repeater/Mesh.

TX Rate

This setting determines the modulation type and in turn the rate at which the data is to be wirelessly transferred. The default and recommended setting is ‘Auto’. Values are Auto (recommended) / 64-QAM 5/6 FEC / 64-QAM 3/4 FEC / 64-QAM 2/3 FEC / 16-QAM 3/4 FEC / 16-QAM 1/2 FEC / QPSK FEC 3/4 / QPSK FEC 1/2 / BPSK FEC 1/2.

Ceiling Rate

The Ceiling Rate parameter is visible when the TX Rate is set to AUTO. The Ceiling rate limits the maximum Tx rate of the link. Values are 64-QAM 5/6 FEC / 64-QAM 3/4 FEC / 64-QAM 2/3 FEC / 16-QAM 3/4 FEC / 16-QAM 1/2 FEC / QPSK FEC 3/4 / QPSK FEC 1/2 / BPSK FEC 1/2.

Network ID / Mesh ID

Each network of MICROHARD PMDDL2350 modules must an a unique Network ID. This Network ID must be set in each unit on the network. When configured to operate as a Mesh Network, this becomes the Mesh ID and must be specified on every unit to participate. Value is pMDDL.

Degree of Mesh Path Agility

That parameter controls the stability of the mesh path. The recommended setting is “Medium”. Values are High/Medium/Low.

Encryption Type

The encryption types defines the type of security used for the Wireless Interface, to join a network a device must know the correct Encryption Key. Values are Disabled / AES-128.

Encryption Key

This is the password, or preshared key that is required by any device to connect to the wireless interface of the MICROHARD PMDDL2350. It is strongly recommended to always have a password defined, and changed from the factory default. Value is 1234567890 (string).

Extended Addressing

Enable or disable extended addressing. For multicast traffic sending from the Master to multiple receivers, it is recommended to configure the system with “Extended Addressing” disabled and also select a proper multicast rate defined by the link budget. Values are On / Off.

Comport Tx Rate

When using Ethernet and Serial data. If the volume of serial data is high, leave at the default (Normal Rate), if the volume of Ethernet data is high set com data to High Rate (Compressed). Values are Normal / High.

Occasional firmware updates may be released by Microhard Systems which may include fixes and/or new features. The firmware can be updated wirelessly using the WebUI under System > Maintenance > Firmware Upgrade.

Erase Current Configuration

Choose to keep or erase the current configuration. Erasing the configuration of the MICROHARD PMDDL2350 unit during the upgrade process will upgrade, and return the unit to factory defaults, including the default IP Address and password. Values are Keep ALL Configuration (check box) / Erase Configuration (check box).

Firmware Image

Use the Browse button to find the firmware file supplied by Microhard Systems. Select “Upgrade Firmware” to start the upgrade process. This can take several minutes. Value is (no default) (file).

Reset to Default Configurations

The MICROHARD PMDDL2350 may be set back to factory defaults by using the Reset to Default option under System > Maintenance > Reset to Default. **Caution** – All configuration settings will be lost!!!

Additionally you can select the “Wipeout data and logs” check box to delete all data including historical logs and any other data from the device. **Caution** – All configuration settings & data/logs will be lost!!!

The configuration of the MICROHARD PMDDL2350 can be backed up to a file at any time using the Backup Configuration feature. The file can then be restored using the Restore Configuration feature. It is always a good idea to backup any configurations in case of unit replacement.

The configuration files cannot be edited offline, they are used strictly to backup and restore units. A password can be added to the Backup and Restore files. If the password is lost, files that have been backed up with a password can not be restored.

Configuration File Name / Backup

Use this field to name the configuration file. The .config extension will automatically be added to the configuration file.

Select Configuration file / Check Configuration File / Restore

Use the ‘Browse’ button to find the backup file that needs to be restored to the unit. Use the ‘Check Restore File’ button to verify that the file is valid, and then the option to restore the configuration is displayed.

If the selected file is password protected the password must be set before restoring the file using the “Set Password” field under “Security for Configurations”.

The MICROHARD PMDDL2350 can be remotely rebooted using the System > Reboot menu. A button ‘Reboot Now’ is provided. Once pressed, the unit immediately reboots and starts its boot up procedure. An automatic Scheduled Reboot (up to 3) can also be configured to force the MICROHARD PMDDL2350 to reboot daily, weekly or monthly.

Status

Enable or disable the Scheduled Reboot. Values are Enable / Disable.

Type

Set the reboot schedule to reboot the modem once a day, week or month at a time and date specified below. Values are Reboot Daily / Reboot Weekly / Reboot Monthly.

Days / Time

When set to Weekly, set the day (1 is Sunday, 7 is Saturday) in which to reboot the modem. In a monthly configuration it is simply the date of the month (1 to 31). Once the day or date has been selected, specify the time (24hr clock) in which to initiate the scheduled reboot. Values are (varies).

Certain services in the MICROHARD PMDDL2350 can be disabled or enabled for either security considerations or resource/power considerations. The Enable/Disable options are applied after a reboot and will take affect after each start up.

FTP

The FTP service is used for firmware recovery operations. Values are Enable / Disable.

Telnet

Using the Telnet Service Enable/Disable function, you can disable the Telnet service from running on the MICROHARD PMDDL2350. The port used by the Telnet service can also be modified. The default is 23. Value is 23 (port).

SSH

Using the SSH Service Enable/Disable function, you can disable the SSH service (Port 22) from running on the MICROHARD PMDDL2350. The port used by the SSH service can also be modified. The default is 22. Value is 22 (port).

Web UI

The default web server port for the web based configuration tools used in the modem is port 80 (http) and port 443 (HTTPS). Values are HTTP/HTTPS, HTTP, HTTPS (selection).

The WAN configuration refers to the wired WAN connection on the MICROHARD PMDDL2350. The WAN port can be used to connect the MICROHARD PMDDL2350 to other networks, the internet and/or other network resources.

Working Mode

Use this to set the function of the physical WAN port. If set to independent WAN, the physical WAN port will operate as a standard WAN port. Alternatively it can be configured to be bridged to the LAN, and operate as a second LAN port, or even as an independent LAN. Values are Independent WAN / Bridged with LAN Port / Independent LAN.

Connection Type

This selection determines if the MICROHARD PMDDL2350 will obtain an WAN IP address from a DHCP server, or if a static IP address will be entered. If a Static IP Address is chosen, the fields that follow must also be populated. Values are DHCP / Static.

IP Address

If ‘Static’ Connection Type is selected, a valid IPv4 Address for the network being used must be entered in the field. If ‘DHCP’ is chosen this field will not appear and it will be populated automatically from the DHCP server. Default is (no default).

Netmask

If ‘Static’ Connection Type is selected, the Network Mask must be entered for the Network. If ‘DHCP’ is chosen this field will not appear and it will be populated automatically from the DHCP server. Default is (no default).

Default Gateway

If the MICROHARD PMDDL2350 is integrated into a network which has a defined gateway, then, as with other hosts on the network, this gateway’s IP address will be entered into this field. If there is a DHCP server on the network, and the Connection Type is selected to be DHCP, the DHCP server will populate this field with the appropriate gateway address. Default is (no default).

Default Route

The Default Route parameter allows you to set this interface as the default route in the routing table. This is result in all data being sent to the WAN interface if there the destination network is not directly connected (LAN, Wireless etc), and no other route has been specified. In cases where the WAN is the primary connection this would be set to Yes. Values are No / Yes.

DNS Servers – Mode

Select between Manual or Auto for DNS server(s) for the WAN interface. If set to Auto the MICROHARD PMDDL2350 will try to automatically detect the DNS servers to use, which is normally the case when the WAN is DHCP. Manual required the DNS addresses to be known and entered below. Values are Manual / Auto.

Primary DNS

DNS (Domain Name Service) Servers are used to resolve domain names into IP addresses. If set to auto and the Connection Type is set for DHCP the DHCP server will populate this field and the value set can be viewed on the Network > Status page. To add additional static servers, enter them here. Default is (no default).

Secondary DNS

DNS (Domain Name Service) Servers are used to resolve domain names into IP addresses. If set to auto and the Connection Type is set for DHCP the DHCP server will populate this field and the value set can be viewed on the Network > Status page. To add additional static servers, enter them here. Default is (no default).

Normally, the MICROHARD PMDDL2350 module is bootstrapped to USB host mode that allows select generic devices to be used to extend Ethernet and serial functions (USB to Ethernet Adapters, USB to Serial Converters).

Alternatively, the MICROHARD PMDDL2350 can be set to Device mode by pulling PIN 14 (on OEM module) low through an 1k resistor to switch the USB mode. Older development boards will not support this and will either need to be modified or new boards will need to be acquired. In USB device mode, there are two functions supported, RNDIS/CDC Ethernet and CDC Serial port, when connected a host machine (PC etc).

RDNIS Ethernet and CDC Serial composite drivers are available from Microhard Systems.

Working Mode

The RNDIS Ethernet USB port can be configured to operate as an additional LEN Ethernet Port with the current LAN (Bridged) or it can be configured to operate as a independent LAN (Subnet). Values are Independent LAN / Bridge with LAN Port.

LAN Configuration

When bridged with LAN the network parameters are set from the Network > LAN menu. When set to Independent the port can be configured as Statis or DHCP. Again refere to the LAN configuration for help with the displayed fields and definitions.

DHCP Server

When in Independent mode the MICROHARD PMDDL2350 can run a DHCP service on the USB port to assign IP addresses and lease information. Refer to Network > LAN > DHCP for help with parameters and definitions.

The General Firewall settings allow users to enable or disable the firewall, and to decide which areas of the modem to protect. The Firewall can also be reset to factory defaults from this area of the WebUI.

WAN Remote Management

Allow remote management of the MICROHARD PMDDL2350 on the WAN side using the WebUI on port 80(HTTP), and 443 (HTTPS). If disabled, the configuration can only be accessed from the LAN. Values are Enable / Disable.

WAN Request

When Blocked the MICROHARD PMDDL2350 will block all requests from devices on the WAN unless specified otherwise in the Access Rules, MAC List, IP List configurations. Access to ports 80 (HTTP) and 443 (HTTPS-if enabled), is still available unless disabled in the WAN Remote Management option. Values are Block / Allow.

LAN to WAN Access Control

Allows or Blocks traffic from the LAN accessing the WAN unless specified otherwise using the Access Rules, MAC, and IP List configuration. Values are Block / Allow.

Anti-Spoof

The Anti-Spoof protection is to create some firewall rules assigned to the external interface (WAN) of the firewall that examines the source address of all packets crossing that interface coming from outside. If the address belongs to the internal network or the firewall itself, the packet is dropped. Values are Enable / Disable.

Packet Normalization

Packet Normalization is the normalization of packets so there are no ambiguities in interpretation by the ultimate destination of the packet. The scrub directive also reassembled fragmented packets, protecting some operating systems from some forms of attack, and drops TCP packets that have invalid flag combinations. Values are Enable / Disable.

The MICROHARD PMDDL2350 can be used to provide remote access to connected devices. If all incoming traffic is intended for a specific connected device, DMZ could be used to simplify the process, as all incoming traffic can be directed towards a specific IP address.

In the case where there is multiple devices, or only specific ports need to be passed, Port forwarding is used to forward traffic coming in from the WAN to specific IP Addresses and Ports on the LAN. Port forwarding can be used in combination with other firewall features, but the Firewall must be enabled for Port forwarding to be in effect. If the WAN Request is blocked on the General Tab, additional rules and/or IP Lists must be set up to allow the port forwarding traffic to pass through the firewall.

DMZ Mode

Enable or disable DMZ Mode. DMZ can be used to forward all traffic to the DMZ Server IP listed below. Values are Disable / Enable.

DMZ Server IP

Enter the IP address of the device on the LAN side of the MICROHARD PMDDL2350 where all the traffic will be forwarded to. Value is (IP Address) 192.168.100.100.

Exception Port

Enter a exception port number that will NOT be forwarded to the DMZ server IP. Usually a configuration or remote management port that is excluded to retain external control of the MICROHARD PMDDL2350. Up to 15 ports can be specified using list (port1, port2, etc) or by port range (start: stop). Value is 0 (Port #).

Firewall Port Forwarding Configuration:

Name

This is simply a field where a convenient reference or description is added to the rule. Each Forward must have a unique rule name and can use up to 10 characters. Value is Forward (10 chars).

Source

Select the source for the traffic, if applicable. Value is (none) (selection).

Internal Server IP

Enter the IP address of the intended internal (i.e. on LAN side of the MICROHARD PMDDL2350) server. This is the IP address of the device you are forwarding traffic to. Value is (IP Address) 192.168.2.1.

Internal Port

Target port number of the internal server on the LAN IP entered above. Single port or port ranged can be specified (start: stop). Value is 3000 (Port #).

Protocol

Select the type of transport protocol used. For example Telnet uses TCP, SNMP uses UDP, etc. Values are TCP / UDP / Both (selection).

External Port

Port number of the incoming request (from WAN-side). Single port or port ranged can be specified (start: stop). Value is 2000 (Port #).

MAC List configuration can be used to control which physical LAN devices can access the ports on the MICROHARD PMDDL2350, by restricting or allowing connections based on the MAC address. IP List configuration can be used to define who or what can access the MICROHARD PMDDL2350, by restricting or allowing connections based on the IP Address/Subnet.

MAC-IP List can be used alone or in combination with LAN to WAN Access Control to provide secure access to the physical ports of the MICROHARD PMDDL2350.

Firewall MAC List Configuration:

Rule Name

The Rule Name field is required to give the rule a convenient name for reference. Each rule must have a unique name, up to 10 characters in length. Value is MAC_List (10 chars).

MAC Address

Specify the MAC Address to be added to the list. Must be entered in the correct format as seen above. Not case sensitive. Value is 00:00:00:00:00:00 (MAC Address).

Action

The Action is used to define how the rule handles the connection request. ACCEPT will allow a connection, while REJECT (error) and DROP (quietly dropped), will refuse connections. Values are ACCEPT / DROP / REJECT (selection).

Firewall IP List Configuration:

Rule Name

The Rule Name field is required to give the rule a convenient name for reference. Each rule must have a unique name, up to 10 characters in length. Value is IP_List (10 chars).

Action

The Action is used to define how the rule handles the connection request. ACCEPT will allow a connection, while REJECT (error) and DROP (quietly dropped), will refuse connections. Values are ACCEPT / DROP / REJECT (selection).

Source

Enter the specific zone that the IP List will apply to, LAN, WAN or None (both). Values are LAN/LAN1/WAN/USB / NONE (Selection).

Source IP Address

Match incoming traffic from the specified source IP range. Boxes accept single IP Addresses without network masks, example: 192.168.1.0 to 192.168.1.255 represents all IP Addresses in the 192.168.1.0/24 network. (Put same IP in both boxes for a single IP match.) Value is 192.168.0.0 (IP Address).

Destination Address

Match incoming traffic from the specified destination IP range. Boxes accept single IP Addresses without network masks, example: 192.168.1.0 to 192.168.1.255 represents all IP Addresses in the 192.168.1.0/24 network. (Put same IP in both boxes for a single IP match.) Value is 192.168.0.0 (IP Address).

The Rules configuration can be used to define specific rules on how local and remote devices access different ports and services. MAC List and IP List are used for general access, and are applied before rules are processed.

It is highly recommended to block as much traffic as possible from the modem, especially when using a public IP address. The best security would to be to allow traffic only from trusted IP addresses, and only the specific ports being used, and block everything else. Not configuring the firewall and the firewall rules correctly could result in unpredictable data charges from your provider.

Rule Name

The rule name is used to identify the created rule. Each rule must have a unique name and up to 10 characters can be used. Value is characters (10 Chars).

Action

The Action is used to define how the rule handles the connection request. ACCEPT will allow a connection, while REJECT (error) and DROP (quietly dropped), will refuse connections. This is configured based on how the WAN Request and LAN to WAN Access Control are configured in the previous menus. Values are ACCEPT / DROP / REJECT (selection).

Source

Select the zone which is to be the source of the data traffic. The LAN/WAN refers to local connections on the MICROHARD PMDDL2350. Values are LAN/WAN/Independent LAN/None (selection).

Source IPs

Match incoming traffic from the specified source IP range. Boxes accept single IP Addresses without network masks, example: 192.168.1.0 to 192.168.1.255 represents all IP Addresses in the 192.168.1.0/24 network. (Put same IP in both boxes for a single IP match.) Value is 192.168.0.0 to 192.168.0.0 (IP Address).

Destination

Select the zone which is the intended destination of the data traffic. The selections shown will reflect any network interfaces configured. Values are LAN/WAN/None (selection).

Destination IPs

Match incoming traffic from the specified destination IP range. Boxes accept single IP Addresses without network masks, example: 192.168.1.0 to 192.168.1.255 represents all IP Addresses in the 192.168.1.0/24 network. (Put same IP in both boxes for a single IP match.) Value is 192.168.0.0 to 192.168.0.0 (IP Address).

Destination Port

Match incoming traffic directed at the given destination port or port range. (To specify a port range use a From:To (100:200) format). Value is 0 (port).

Protocol

The protocol field defines the transport protocol type controlled by the rule. Values are TCP / UDP / Both / ICMP.

The firewall can be returned to default setting without requiring the entire modem to be reset to defaults. It is recommended to restart the modem once changes to the firewall or a reset is performed. This option is available under Firewall > Default in the WebUI.

The Serial > Summary window gives a summary of the on board serial data port. A second serial port can be added to the MICROHARD PMDDL2350 OEM by interfacing a FTDI USB to Basic UART IC. If the MICROHARD PMDDL2350 has been set to USB Device mode (Pin 14 connected to GND through a 1K resistor), the GS0 tab will appear and the USB port can be used to connect to a USB host that has the Microhard Composite Drivers installed. The USB port will appear as a serial device on the host system.

The Summary window shows a number of status items that aid in viewing the operation, statistics, and troubleshooting of the RS232 & USB Serial Ports.

General Status

• Port Status – Shows if the RS232 has been enabled in the configuration.
• Baud Rate – The current baud rate used to interface with the connected device.
• Connect As – The type of IP Protocol Config is displayed here (TCP, UDP, SMTP, PPP, etc)
• Connect Status – Shows if there are any current connections / if the port is active.

This menu option is used to configure the serial device server for the serial communications port. Serial device data may be brought into the IP network through TCP, UDP, or multicast; it may also exit the MICROHARD PMDDL2350 network on another MICROHARD PMDDL2350 serial port. The fully-featured RS232 interface supports hardware handshaking.

Port Status

Select operational status of the Serial Port. The port is in console mode by default. Values are Data / Console.

Port Mode

Select the port mode of the data port. When using supported motherboards or on the enclosed models, this will allow setting the port to RS485 modes. Values are RS232 / RS485 Full Duplex / RS485 Half Duplex.

Escape Sequence

Enabling the escape sequence allows users to temporarily exit data mode and enter console mode for the serial port. Values are Enabled / Disabled.

Escape Guard Interval

Appears only when the Escape Sequence is enabled. Enter the time interval in which the escape sequence must be entered fully. Value is 1 (seconds).

Escape Sequence String

Only shown when the escape sequence is enabled. Enter the characters to be used for the escape sequence. Value is +++ (characters).

Data Baud Rate

The serial baud rate is the rate at which the modem is to communicate with the attached local asynchronous device. Values (bps) include: 921600, 460800, 230400, 115200, 57600, 38400, 28800, 19200, 14400, 9600, 7200, 4800, 3600, 2400, 1200, 600, 300.

Data Format

This setting determines the format of the data on the serial port. The default is 8 data bits, No parity, and 1 Stop bit. Values are 8N1 / 8E1 / 8O1.

Data Mode

This setting defines the serial output data framing. In Transparent mode (default), the received data will be output promptly from the MICROHARD PMDDL2350. Values are Seamless / Transparent.

Character Timeout

In Seamless mode, this setting determines when the serial server will consider the recently received incoming data as being ready to transmit. Value is 24 (characters).

Maximum Packet Size

Defines the buffer size that the serial server will use to receive data from the serial port. Value is 256 (bytes).

No-Connection Data

When enabled the data will continue to buffer received on the serial data port when the radio loses synchronization. When disabled the MICROHARD PMDDL2350 will disregard any data received on the serial data port when radio synchronization is lost. Values are Disable / Enable.

MODBUS TCP Status

This option will enable or disable the MODBUS decoding and encoding features. Values are Disable / Enable.

This setting determines which protocol the serial server will use to transmit serial port data over the MICROHARD PMDDL2350 network. The protocol selected will determine which configuration options appear in the remainder of the RS232 Configuration Menu.

Values are: TCP Client / TCP Server / TCP Client/Server / UDP Point-to-Point / UDP Point to Multipoint (P) / UDP Point to Multipoint (MP) / PPP (Not supported on USB).

TCP Client: When TCP Client is selected and data is received on its serial port, the MICROHARD PMDDL2350 takes the initiative to find and connect to a remote TCP server. The TCP session is terminated by this same unit when the data exchange session is completed and the connection timeout has expired. If a TCP connection cannot be established, the serial port data is discarded.

• Remote Server Address: IP address of a TCP server. Default: 0.0.0.0.
• Remote Server Port: A TCP port which the remote server listens to. Default: 20001.
• Outgoing Connection Timeout: Determines when the MICROHARD PMDDL2350 will terminate the TCP connection if the connection is in an idle state. Default: 60 (seconds).
• Fast Recovery: Sets the TCP session parameters and buffers to be set such that TCP sessions recover faster in environments where the wireless link is weak/unstable. Default: Disable.

TCP Server: In this mode, the MICROHARD PMDDL2350 will wait for a Client to request a session of it. If a session is established, data will flow from the Client to the Server, and, if present, from the Server to the Client. If a session is not established, both Client-side serial data, and Server-side serial data, if present, will be discarded.

• Local Listening Port: The TCP port which the Server listens to. Default: 20001.
• Incoming Connection Timeout: Established when the TCP Server will terminate the TCP connection is the connection is in an idle state. Default: 300 (seconds).
• Fast Recovery: Sets the TCP session parameters and buffers to be set such that TCP sessions recover faster in environments where the wireless link is weak/unstable. Default: Disable.

TCP Client/Server: In this mode, the MICROHARD PMDDL2350 will be a combined TCP Client and Server, meaning that it can both initiate and serve TCP connection (session) requests. Refer to the TCP Client and TCP Server descriptions and settings described previously as all information, combined, is applicable to this mode.

UDP Point-to-Point: In this configuration the MICROHARD PMDDL2350 will send serial data to a specifically-defined point, using UDP packets. This same MICROHARD PMDDL2350 will accept UDP packets from that same point.

• Remote IP Address: IP address of distant device to which UDP packets are sent when data received at serial port. Default: 0.0.0.0.
• Remote Port: UDP port of distant device mentioned above. Default: 20001.
• Listening Port: UDP port which the MICROHARD PMDDL2350 listens to (monitors). Default: 20001.
• UDP Timeout(s): UDP Timeout in seconds. Default: 10.

UDP Point-to-Multipoint (P): This mode is configured on an Bullet which is to send multicast UDP packets.

• Multicast IP Address: A valid multicast address this unit uses to send multicast UDP packets upon receiving data from the serial port. Default: 224.1.1.2.
• Multicast Port: A UDP port that this Nano IP will send UDP packets to. Default: 20002.
• Listening Port: The UDP port that this unit receives incoming data on from multiple remote units. Default: 20012.
• Time to Live: Time to live for the multicast packets. Default: 1 (hop).
• Multicast Interface: Select, if applicable, which interface to send/listen for Multicast packets. Default: default.

UDP Point-to-Multipoint (MP): This protocol is selected on the units which are to receive multicast UDP packets. See the previous description of UDP Point-to-Multipoint (P).

• Remote IP Address: The IP address of a distant device (IP Series or, for example, a PC) to which the unit sends UDP packets of data received on the serial port. Most often this is the IP address of the Master IP Series. Default: 0.0.0.0.
• Remote Port: The UDP port associated with the Remote IP Address (above). Default: 20012.

PPP: The serial port can be configured as a PPP server for a serial connection with a PC or other device. The attached PC could then use a dedicated serial (WindowsXP – dialup/modem) type PPP connection to access the network resources of the MICROHARD PMDDL2350.

• PPP Mode: Can be set for Active or Passive. Default: Passive.
• Expected String: The handshaking string that is expected in order to allow a connection. Default: CLIENT.
• Response String: This is the handshaking string that will be sent by the modem once the expected string is received. Default: CLIENTSERVER.
• PPP LCP Echo Failure Number: The PPP server will presume the peer to be dead if the LCP echo-requests are sent without receiving a valid LCP echo-reply. Default: 0.
• PPP LCP Echo Interval: The PPP server will send an LCP echo-request frame to the peer every ‘n’ seconds. Default: 0.
• PPP Local IP: Enter the local PPP IP Address, the IP Address of the MICROHARD PMDDL2350 COM Port. Default: 192.168.0.1.
• PPP Host IP: Enter the PPP Host IP here. This is the IP of the PC or attached device. Default: 192.168.0.99.
• PPP Idle Timeout(s): It is the timeout for tearing down the ppp connection when there is no data traffic within the time interval. Default: 30.

This tab only appears if the MICROHARD PMDDL2350 has been set to operate as a USB Device (Pin 14 connected to GND through a 1k resisitor). Microhard USB Serial Composite Drivers are available which allow the MICROHARD PMDDL2350 to appear as a serial device to a USB Host (PC etc.).

The USB port can be set to “Idle” or to operate as a Data port.

The USB port configuration is identical to the Serial Port > Settings parameters. For help or definitions of each field, refer to the previous section of this manual which describes the available settings.

The Network Tools Ping feature provides a tool to test network connectivity from within the MICROHARD PMDDL2350 unit. A user can use the Ping command by entering the IP address or host name of a destination device in the Ping Host Name field, use Count for the number of ping messages to send, and the Packet Size to modify the size of the packets sent.

The Traceroute command can be used to provide connectivity data by providing information about the number of hops, routers and the path taken to reach a particular destination on the MICROHARD PMDDL2350.

The MICROHARD PMDDL2350 features an integrated Iperf server/client to use to measure and analyze throughput of TCP/UDP packets to and/or from the MICROHARD PMDDL2350. Iperf is a 3rd party utility that can be loaded on any PC to measure network performance.

The MICROHARD PMDDL2350 can be configured to operate as a Server, listening for an incoming connection from another device (with Iperf), or PC running an Iperf client. If set to Iperf client, the MICROHARD PMDDL2350 will connect to or send packets to a specified Iperf server.

Iperf Mode

Select between an Iperf Server (listens for incoming connections) and client (initiates a connection with a server). Values are Server / Client.

Server Status

If the Iperf mode to set to Server, this Server Status allows a user to Enable or Disable the server. Values are Enable / Disable.

Protocol

Select the type of packets to be sent to test the throughput. TCP packets are connection oriented and require additional overhead for the handshaking that occurs, while UDP is a connectionless, best effort oriented protocol. Values are TCP / UDP.

The MICROHARD PMDDL2350 can be Tethered to certain Android Mobile Devices to view a video stream from a remote video encoder. This is a preliminary feature that has limited support at this time.

USB Tethering Mode

Enable USB Tethering. Enabling USB Tethering with open all WAN requests on the firewall to allow for proper operation. Values are ON/OFF.

Forward Video

If enabled the MICROHARD PMDDL2350 will allow video to be viewed from an attached android device from an remote video source. Values are Enable / Disable.

Encoder’s Address

Enter the IP address of the external encoder of which the video source Is located. Value is (IP Address) (no default).

Encoder’s Port

Enter the port number for the video encoder’s. Value is 554 (IP Address).

The Password Change menu allows the password of the user ‘admin’ to be changed. The ‘admin’ username cannot be deleted, but additional users can be defined and deleted as required. After the modem has been reset to factory defaults, it is mandatory to change the default password for admin, the modem will prompt a user to do so upon the first login.

New Password

Enter a new password for the ‘admin’ user. It must be at least 5 characters in length. The default password for ‘admin’ is ‘admin’. Value is admin (characters).

Confirm Password

The exact password must be entered to confirm the password change, if there is a mistake all changes will be discarded. Value is admin (characters).

Different users can be set up with customized access to the WebUI. Each menu or tab of the WebUI can be disabled on a per user basis.

Username

Enter the desired username. Minimum or 5 character and maximum of 32 character. Changes will not take effect until the system has been restarted. Value is (no default) (characters).

Password / Confirm Password

Passwords must be a minimum of 5 characters. The Password must be re-entered exactly in the Confirm Password box as well. Value is (no default) min 5 characters (characters).

The MICROHARD PMDDL2350 may be configured to operate as a Simple Network Management Protocol (SNMP) agent. Objects specific to the MICROHARD PMDDL2350 are hosted under private enterprise number 21703.

SNMP Agent Status

If disabled, an SNMP service is not provided from the device. Enabled, the device – now an SNMP agent – can support SNMPv1, v2, & v3. Values are Disable / Enable.

Read Only Community Name

Effectively a plain-text password mechanism used to weakly authenticate SNMP queries. This community name has only READ priority. Value is public (string).

Read Write Community Name

Also a plain-text password mechanism used to weakly authenticate SNMP queries. This community name has only READ/WRITE priority. Value is private (string).

Listening Port

Enter the UDP port on which the MICROHARD PMDDL2350 listens for incoming SNMP get/set messages. The default is port 161. Value is 161 (UDP Port).

SNMP Version

Select the SNMP version used. Only SNMP version 1 & 2 support SNMP traps (See MIB). Values are Version 1 / Version 2 / Version 3 (selection).

SNMP V3 User Name

Defines the user name for SNMPv3. Value is V3user (string).

V3 User Read Write Limit

Defines accessibility of SNMPv3; If Read Only is selected, the SNMPv3 user may only read information; if Read Write is selected, the SNMPv3 user may read and write (set) variables. Values are Read Only / Read Write (selection).

V3 User Authentication Level

Defines SNMPv3 user’s authentication level:

• NoAuthNoPriv: No authentication, no encryption.
• AuthNoPriv: Authentication, no encryption.
• AuthPriv: Authentication, encryption.

Values are NoAuthNoPriv / AuthNoPriv / AuthPriv (selection).

V3 User Authentication Password

SNMPv3 user’s authentication password. Only valid when V3 User Authentication Level set to AuthNoPriv or AuthPriv. Value is 00000000 (string).

V3 User Privacy Password

SNMPv3 user’s encryption password. Only valid when V3 User Authentication Level set to AuthPriv (see above). Value is 00000000 (string).

Auth Failure Traps

If enabled, an authentication failure trap will be generated upon authentication failure. (SNMP v1 & v2 only). Values are Disable / Enable (selection).

Trap Community Name

The community name which may receive traps. (SNMP v1 & v2 only). Value is TrapUser (string).

Trap Manage Host IP

Defines a host IP address where traps will be sent to (e.g. SNMP management system PC IP address). (SNMP v1 & v2 only). Value is 0.0.0.0 (IP Address).

SNMP Trap Status

Enable or disable autonomous SNMP traps from the device. Values are Disable / Enable (selection).

Trap Community Name

Effectively a plain-text password mechanism used to weakly authenticate SNMP queries. Being part of the community allows the SNMP agent to process SNMP traps. Value is TrapUser (string).

Trap Manage Host IP

Enter the IP address of the SNMP host to which SNMP traps are sent from the device. Value is 0.0.0.0 (IP Address).

Auth Failure Traps

Enable or Disable authentication requirements for outgoing configured SNMP event traps. Values are Disable / Enable (selection).

RSSI

Enable or Disable RSSI traps. The threshold in which that traps are triggered can also be configured, as well as the frequency at which the traps are sent when the threshold has been crossed. Values are Disable / Enable (selection) for status, 90 (30-120) in -dBm for RSSI threshold, and 90 (0 – 65535 seconds, 0=disabled.) for Resend Interval.

WAN IP

Enable or Disable WAN IP Traps. Device will send a trap any time the WAN IP has been changed. Generally used with dynamic IP addresses. Values are Disable / Enable (selection).

Microhard Radios employ a discovery service that can be used to detect other Microhard devices on a network. This can be done using a stand alone utility from Microhard System’s called ‘IP Discovery’ or from the Tools > Discovery menu. The discovery service will report the MAC Address, IP Address, Description, Product Name, Firmware Version, Operating Mode, and the Network ID.

Discovery Service Status

Use this option to disable or enable the discovery service. Values are Disable / Enable (selection).

Server Port Settings

Specify the port running the discovery service on the MICROHARD PMDDL2350 unit. Value is 20097 (Port #).

Network Discovery

The Network discovery tool allows the MICROHARD PMDDL2350 to send a broadcast to all Microhard devices on the same network. Other units on the network will respond to the broadcast and report their MAC address, IP address (With a hyperlink to that units WebUI page), description, firmware version.

The discovery service can be a useful troubleshooting tool and can be used to quickly find and indentify other units on the network.

The following types of coaxial cable are recommended and suitable for most applications (followed by loss at 2.4GHz, in dB, per 100 feet):

• LMR 195 (10.7)
• LMR 400 (3.9)
• LMR 600 (2.5)

For a typical application, LMR 400 may be suitable. Where a long cable run is required – and in particular within networks where there is not a lot of margin available – a cable with lower loss should be considered.

When installing cable, care must be taken to not physically damage it (be particularly careful with respect to not kinking it at any time) and to secure it properly. Care must also be taken to affix the connectors properly – using the proper crimping tools – and to weatherproof them.

The most effective protection against lightning-induced damage is to install two lightning surge arrestors: one at the antenna, the other at the interface with the equipment. The surge arrestor grounding system should be fully interconnected with the transmission tower and power grounding systems to form a single, fully integrated ground circuit. Typically, both ports on surge arrestors are N-type female.

The two most common types of antenna are the omnidirectional (’omni’) and directional (Yagi).

An omni typically has 3-6dBi gain and spreads its energy in all directions (hence the name ’omnidirectional’). The ’pattern’ of the energy field is in the shape of a donut, with the antenna mounted vertically at the centre. This vertical-mounted antenna produces a signal which is vertically ’polarized’.

A Yagi has a more focused antenna pattern, which results in greater gain: commonly, 6-12dBi. The pattern of a Yagi is in the shape of a large raindrop in the direction in which the antenna is pointed. If the elements of the Yagi are perpendicular to the ground (most common orientation) the radiated signal will be vertically polarized; if parallel to the ground, the polarization is horizontal.

A multipath environment is where the signal from origin to destination may not have a direct path.

In a multipath rich conditions is it recommended that each MICROHARD PMDDL2350 end have a pair (2) of omni directional antennas that have at least half-wavelength distance between them. A set of (4) Omni directional antennas is good for a pair of MICROHARD PMDDL2350 radios.

The wavelength is determined by the specific frequency being used by the MICROHARD PMDDL2350. For example the length of a wavelength @ 2.450 MHz is 122 mm, therefore the half wavelength is 61 mm. This would mean that the pair of antennas on each MICROHARD PMDDL2350 system would have to be spaced at least 61 mm apart.

In good LOS applications, where the main LOS signal is much stronger than other components, orthogonally polarized antennas on both radios will out perform other types of antennas in terms of spatial separation. With these types of antenna systems it is recommended to space each pair of antennas at least one or more wavelengths apart on each end of the system to achieve as much spatial diversity as possible.

• Circular polarized antennas (Left Hand Circular Polarization (LHCP) and Right Hand Circular Polarization (RHCP)) will work with circular polarized antennas (LHCP and RHCP) for best match.
• Circular polarized antennas (LHCP and RHCP) will work with linear orthogonal antennas (V-POL and H-POL) at about 3 db loss. This combination results in preferable performance for UAV applications as circular polarized antennas at GCS acquire adequate signal no matter what the UAV antennas’ orientation change to.
• Linear polarized antennas (V-POL and H-POL) will work with linear orthogonal antennas (V-POL and H-POL) for best match.
• OMNI directional antennas work with OMNI directional antennas due to dimension & weight limitation, two antennas are one or more wavelengths apart.

Assuming adequate antenna heights, a basic formula to determine if an adequate radio signal path exists (i.e. there is a reasonable fade margin to ensure reliability) is:

Fade Margin = System Gain – Path Loss

where all values are expressed in dB.

System gain is calculated as follows:

System Gain = Transmitter Power + (Transmitter Antenna Gain – Transmitter Cable and Connector Losses) + (Receiver Antenna Gain – Receiver Cable and Connector Losses) + | Receiver Sensitivity |.

where all values are expressed in dB, dBi, or dBm, as applicable.

For example, if Tx power = 30dBm, Tx antenna gain = 6dBi, Tx cable/connector loss = 2dB, Rx antenna gain = 3dBi, Rx cable/connector loss = 2dB, and Rx sensitivity = -108dBm, then:

System Gain = [30+(6-2)+(3-2)+108]dB

System Gain = [30+4+1+108]dB

System Gain = 143dB.

Assuming a path loss of 113dB for this example, the fade margin = 143-113 = 30dB. 30dB exceeds the desired fade margin of 20dB, therefore this radio communications link would be very reliable and robust.