TelcoBridges TSBC3000, Руководство по установке

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Installing the Equipment
2.5.4 Connecting to the PSTN in a TSBC3000 Series 1+1 System
(Optional TDM fall-back feature)
Note
This section only applies to the TSBC3000-680. In addition, TDM fall-back connection to
the PSTN is an optional feature.
A TSBC3000 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 53 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 a TSBC3000 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 28.
2. Connect T1/E1 lines 0-7 from the 'gateway' section of the patch panel to the RJ48C connectors of
the TSBC3000 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 TSBC3000 1 unit.
4. Repeat step 1 - 3 for lines 8-15, connecting them to a second patch panel.