TDM Multiplexer integrating Voice DataThe DV-MUX3 is an adaptive TDM multiplexer integrating one or two voice/fax channels and one synchronous data channel onto a dial-up modem or a digital link at rates from 9.6 kbps to 256 kbps. When operating in adaptive mode, the bandwidth is dynamically allocated to the voice and data channels. The data channel can operate at rates up to 252.8 kbps. The DV-MUX3 supports interfaces for both the link and data channel for V.24/RS-232, V.35, V.36/RS-449, RS-530 and X.21. The voice channels provide high quality voice compression using the ITU G.723.1 voice digitizing algorithm, at selectable rates of 4.8, 6.4, 7.2, 9.6 or 12.8 kbps. Near toll quality voice production (comparable to ADPCM 32 kbps) is guaranteed when using rates of 6.4 kbps or higher. The voice moduleThe voice module is equipped with an echo canceller and forward error correction, and is available with either a 2-wire FXS interface, 2-wire FXO interface or a 2-wire/4-wire E&M interface. In-band fax support for Group III fax machines complies with T.4 and T.30. Ensuring Minimal BandwidthFor applications requiring low delay, such as IBM SNA sessions, the DV-MUX3 ensures that the minimal bandwidth required by the application is always available. Diagnostics include remote loopback for each channel, BER test for data and tone injection for the voice channel. The dial-up mechanism for PSTN applications activates the DTR signal to the modem only if the voice channel is "off-hook" or if DTR of the data channel is active. Two DV-MUX3 units can fit side-by-side in a 19" 1U rack. 
Voice and LAN traffic over high speed WAN link
Voice, fax and data session over leased line
Voice and data traffic over a dial-up line
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