Internet and RoIP Links to the SMLRS

The SMLRS is a unique system.  Its robustness and system reliability stem from high quality system components and true RF links.  However, the system designers realize that today there is also a need for linking into the system via the Internet and RoIP protocols.

The first protocol is for listen only via the Internet.  By visiting, you can monitor online.  When you arrive at this page, scroll down to the link titled “Southwest Missouri Linked Repeater System”.  Select from the dropdown menu the media player you wish to use.  Options such as web player, java web player, windows media player, iTunes, Real player and Winamp are available options.  Then, click on the speaker icon in the “listen online” column and the chosen player will open and you will be able to monitor SMLRS traffic for as long as you want or need.

The second protocal is an EchoLink node for area amateurs via node # 113667 under callsign K0NXA/R. The EchoLink node operates on a “white list” basis only meaning only amateur operators that have requested access from the SMLRS administrators will be able to utilize the node. If you live within the SMLRS coverage area or routinely travel through the area, your request for access will be granted. If a problem is determined to be coming from your connection, it is subject to removal until corrections can be made. The SMLRS does not allow other repeaters to link into the SMLRS via EchoLink unless prior permission is approved OR during an emergency situation.

The third RoIP mode begins our move into the public service realm.  It is not a device that amateur operators use for IP communications.  All radio traffic from any SMLRS repeater is transmitted out onto the system NXU-2A.  The 147.015 repeater is equipped with the system JPS NXU-2A.  These devices allow for a 1 to 1 connection unless otherwise programmed.  An emergency communications center or mobile command center equipped with a dynamic or static IP and an NXU-2A will be able to connect to the SMLRS system with the proper IP information.  There is also a PC client version, called PC NXU that can be obtained from JPS.  This software allows a person with a laptop PC and a microphone to connect to the NXU-2A at the 147.015 site and connect to the system as if they were using a radio or another NXU-2A.   More information about the NXU-2A can be found at  If your agency would like to establish a connection via this method, please contact one of our system administrators.

Lastly, the SMLRS is connected to the MoSWIN statewide radio system at the Granby KM0HP 145.390 repeater site via an RoIP connection.  Any dispatch console on the system can have the icon placed on their radio dispatch console.  Troop D HQ in Springfield is currently equipped to monitor and access the system as needed.  Only licensed amateurs are allowed to transmit on this icon, but anyone may listen.  This allows dispatchers or radio operators that are licensed amateurs to participate in nets, SkyWarn, or other emergency nets in which amateurs are providing emergency communications with equipment they are familiar with and not a radio that they may have never used.  This also allows amateurs to go to a served agency and send and receive data from the SMLRS from local ARES, RACES, etc. groups without that agency having amateur gear installed at their facility.

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