MSAT-IP Remote Handset

From TCBWiki
Jump to: navigation, search

Other MSAT-IP info.

Setting up VoIP Links for Remote Handset

The MSAT-IP can be used in several ways. A common application is "remoting the handset" over an Ethernet network. To accomplish this, a MSAT-IP is connected to the G2 sat radio and other MSAT-IP is connected to the MSAT handset. Both MSAT-IPs are connected to an Ethernet network and set up to communicate with each other, sending the audio using VoIP and passing information for the MSAT handset's LCD screen and about any keypresses over the network. The result is that the handset can be used exactly as if it was connected to the G2 radio. (A second handset can be connected to the MSAT-IP that is connected to the G2 radio - then either or both handsets can be used).

Updating the MSAT-IP and RCI Software

The virtual handset feature works best with V5.21 or later software (RCI and the firmware on the MSAT-IP itself). See MSAT-IP Firmware Updates. When using V5.21 (and after restoring the default settings), any number of MSAT-IP units on a LAN will automatically find each other (using multicast IP) and connect up. A G2 radio connected to one MSAT-IP can be used by any number of handsets connected to other MSAT-IPs (as well as one handset connected to the MSAT-IP that is connected to the G2 radio). If you need to connect virtual handsets that are not on the same LAN, see the "Network Setup" section below.

WARNING: do not connect two G2 radios each to a MSAT-IP on a LAN without following the directions below! They will activate each other, causing problems on the MSAT network (the MSAT system operators may disable them if this happens). If you need to run more than one G2 radio connected to an MSAT-IP on the same LAN, do the following:

  • Connect only one MSAT-IP with a connected MSAT-G2 radio to the LAN.
  • Use RCI to connect to the MSAT-IP.
  • In RCI, along the right hand side of the screen (just to the left of the gear icons), find one of the green text displays that is lit up and click on it.
  • In the route selection form that pops up, right click on 990 (then repeat for 991). Change the IP address from to (or for a third MSAT-IP with a connected G2 radio, Any MSAT-IPs connected to handsets that are intended to work with this G2 radio will need the same change.

Network Setup

The following instructions describe how to set up the network connection between the MSAT-IPs. Note that if using V5.21 or later firmware (recommended, see above), it defaults to using multicast and works automatically (on a LAN) without needing any of this setup.

There are two ways to handle the network addressing: unicast or multicast, each with some advantages:

  • Multicast can be set up without knowing the IP address of each MSAT-IP
  • Unicast minimizes the network traffic
  • Multicast supports using more than one remote handset with a single G2 radio
  • Unicast can be sent over the Internet; multicast generally cannot

The factory settings for V5.21 have multicast preconfigured. Just connecting two MSAT-IPs to the same LAN is all that is necessary to make the remote handset work. If they are not on the same LAN (such as if they are in different locations connected via the Internet), it will be necessary to manually set them up using the unicast method.

If using unicast, the address of each MSAT-IP must be known and must not change (or the network connection will quit working). That can be done by configuring each MSAT-IP to use a "static" IP address (from RCI's MSAT-IP Settings menu > Network Settings > Setup Network) or to use DHCP but "lock" the MAC address to a specific IP address in the DHCP server (which is usually a feature of the network's router).

Then to set up the VoIP link between MSAT-IPs:

  • Use RCI (included Windows(tm) configuration software) to configure each MSAT-IP. It is easiest to use a serial cable rather than network connection if setting up network addresses. The configuration is virtually identical on each unit, so repeat the following for each one.
  • From RCI's View menu, make sure that ports 1, 2 and 6 are visible.
  • Open the Advanced Radio Properties form by clicking on the gear to the right of port 6 on the screen (or right-click on the name of port 6, typically "VoIP RTP"). Select the Personalities tab and make sure the Route Control Type is set for "VoIP (RTP with Data)" (the "with Data" part is essential). Click "Done" to close that form.
  • Next to the gear for port 6, find and click on the green route selection box; that will open a "Route Selection" form. Right click anywhere in that form to open the "Edit Route" form. Select route 2 (or some other unused route), set the Route Type to "VoIP (RTP)" and the description to anything you want (maybe "MSAT VoIP").
    • If using multicast, set the Remote Connection IP address to and the RTP port to 50000 (change the address to,, etc if using more than one G2 radio on the same network).
    • If using unicast, set the Remote Connection IP address to the IP address of the other MSAT-IP. Set the port number to 21012.
  • In the center of the screen, find the three vertical columns of green dots. The first of these columns is "group one". Click on the dots to put ports 1, 2 and 6 into group 1.
  • From RCI's File menu, select Save Settings (on MSAT-IP).

Once the above settings have been entered on both MSAT-IPs and they are connected to the Ethernet network, the MSAT handset should begin displaying the same information as if it was connected to the G2 radio.

Note that if multiple G2 radios are connected to a network as described above, they MUST NOT be set to communicate directly between them. If using multicast, they must be on different multicast addresses. If using unicast, they must not be set to link to each other. In other words, don't try to patch two MSAT talk groups to each other.

Personal tools