Technical data

TraverseEdge 2020 Applications and Engineering Guide, Chapter 3: System Applications
Release 5.0.x Turin Networks Page 3-47
3.9.1 DS3 TMUX Network Level Applications
Figure 3-42 illustrates a physical TMUX mode application. A TE-2020 DS1 PLM or TE-206 can be used
to map both DS1 Frame Relay and Voice services into VT1.5s for transport to the CO. At the CO a TMUX
equipped TE-2020 provides channelized DS3 interfaces to the Frame Relay switch for data services and to
the voice switch for DS1 PBX trunks.
Figure 3-42 DS3 TMUX Application
The DS1s aggregated within a single channelized DS3 port may originate from any node on the ring, any
subtended ring, or any VT1.5 connected via the TE-2020.
The application shown in Figure 3-43 uses the DS3 TMUX module's portless mode. A Local Exchange
Carrier provides an IXC with DS1 tails for the termination of inter-LATA circuits. The hand off between
carriers is aggregated into DS3s. The IXC hands off three DS3 pipes mapped within a single OC-3 for ease
of interfacing.
Figure 3-43 Portless DS3 TMUX Application
At the CO the TMUX module terminates the channelized DS3s within the OC-3 and maps the DS1s onto
the SONET ring as individual VT1.5s. The VT1.5s are cross-connected via the VT matrix to the appropri-
ate STS on the ring. The VT1.5s are transported around the ring to the remote locations where they termi-
nate on DS1 ports.