Installing the Equipment
15
2.4.3
Connecting to the PSTN
A TMG800 with 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 the line impedance to 75 ohms.
If you are making your own cables, refer to page 92 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.
To connect the TMG800-RJ (RJ48C type) to the PSTN:
1. Start with port 0 located at the top and leftmost position. Connect one cable between this port and
the T1/E1 line. See figure 2.5 on page 15.
2. Repeat step 1, using the next available port.
Figure 2.5
8-Port Interface to the PSTN
Standalone
Summary of Contents for Tmedia TMG800
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