TelcoBridges 800 1+1 series, Installation Manual

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25
Installing the Equipment
2.5.4 Connecting to the PSTN in an 800 Series 1+1 System
Note
This section only applies to the TMG800 and TSG800 systems.
An 800 series 1+1 system has a TDM interface featuring 16 RJ48C type ports enabling 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 51 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.
Patch panels use straight connections. In other words, they do not cross the RX and TX
signals. Connections between the patch panels and an 800 series 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 to the PSTN:
1. Connect T1/E1 lines 0-7 of the Network section of the patch panel to the remote equipment. See
figure 2.11 on page 26.
2. Connect T1/E1 lines 0-7 from the 'Gateway' section of the patch panel to the RJ48C connectors of
the 800 series unit.
3. Connect T1/E1 lines 0-7 from the 'Gateway 1+1' section of the patch panel to the RJ48C
connectors of the 800 1 unit.
4. Repeat step 1 - 3 for lines 8-15, connecting them to a second patch panel.