The Radio Gateway 7700 is a flexible unit that can be used in multiple configurations where it is necessary to connect an analogue radio to an IP based Voice Communication System (VCS), or an IP based radio to an analogue VCS. Two units can also be used back to back in a configuration where both systems are analogue, and the transport medium between is an IP network. When used as a gateway from an ED-137 compliant VCS or a Remote Radio Control device, the Radio Gateway 7700 supports SIP connections using the ED-137 protocol, either as one TRX connection or using separate connections for TX and RX.
The Radio Gateway 7700 supports separate connections from up to 4(7) independent Voice Control or Remote Radio Control Systems. The Radio Gateway 7700 supports both simplex and duplex operation, transferring audio and signalling in both directions simultaneously. When used as a gateway from an analogue VCS or Remote Control, the Radio Gateway 7700 is set up to use static Real Time Protocol (RTP) connections that streams voice and signalling to and from the radio or the other Radio Gateway 7700 that it controls.