The EM2-VR combines a bi-directional 2-wire or 4-wire voice signal with a full duplex RS232 data channel, and transmits it over a 64 kbps synchronous E0 or DS0 channel with a V.35 interface.
At the remote end which may be another EM2-VR or an EM200-VR, these combined data/voice signals are separated, and output on their respective connectors. Note that when using a DS0 channel in a T1 carrier, there must be no “robbed bits”.
The voice channel supports E&M signaling and a high quality voice which is compressed to 40 kbps.
The RS232 channel is data format and speed transparent to rates of 19.2, 9.6, 4.8, 2.4, and1.2 Kbps and less.
We're very happy with the multiplexers that you supplied. The nature of the customer’s installation means that we won’t hear general feedback unless things go wrong – we’ve not received any complaints so assume that there have not been any problems. We found the equipment straight forward to set up using the supplied documentation.