TelcoBridges Tmedia TMG800, Installation Manual

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Installing the Equipment
25
2.5.4 Connecting to the PSTN in a Tmedia 1+1 System
A Tmedia 1+1 system with an RJ TDM interface featuring 8 RJ48C type ports enables the connection to
T1/E1 lines. The termination impedance is set at 100 ohms for T1 lines and 120 ohms for E1 lines. It is
possible to connect an external balun in order to convert to 75 ohms. If you are making your own
cables, refer to page 92 in Appendix A in Appendix A for crossover or straight cable wiring connections.
Note
All ports may not be active. T1/E1 ports are activated by software license; the number of
active ports depends on the licenses purchased.
Note
Patch panels use straight connections. In other words, they do not cross the RX and TX
signals. Connections between the patch panels and a Tmedia 1+1 system require
straight cables. The supplied T1/E1 cables are straight cables. Cables used to connect
the network to the 1+1 patch panel must do the cross connection.
To connect both the TMG800-RJ and TMG800-RJ-1+1 (RJ48C type) to the PSTN:
1. Connect T1/E1 lines 0-7 of the network section of the patch panel to the remote equipment. See
figure 2.12 on page 26.
2. Connect T1/E1 lines 0-7 from the RJ48C connectors of the TMG800-RJ section of the patch panel
to the TMG800-RJ.
3. Connect T1/E1 lines 0-7 from the RJ48C connectors of the TMG800-RJ-1+1 section of the patch
panel to the TMG800-RJ-1+1.
Note:
To connect eight more lines to the TMG800-RJ and the TMG800-RJ-1+1, install another
patch panel and connect the additional eight lines to ports 8-15 on each unit.
1+1