Equipment Connections
13
2.5.2
RJ48 Type Interface (T1/E1/J1)
A TMG3200 with 16 RJ48 type ports enables the connection to T1/E1/J1 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. See figure 2.4 on page 13. If you are making your own
cables, refer to figure 2.5 on page 14 for crossover or straight cable wiring connections.
Note
All ports may not be active. T1/E1/J1 ports are activated by software license; the number
of active ports depends on the licenses purchased.
To connect the
TMG3200
(RJ48 type) to the PSTN:
1. Start with port 1 located at the top and left-most position. Connect one cable between this port and
the T1/E1/J1 line (figure 2.4 on page 13).
2. Repeat step 1, using the next available port.
Figure 2.4
16-Port Interface to the PSTN
ETH
VoIP
TMS
1
2
1
1
2
2
1
9
8
16
15
14
13
12
11
10
7
6
5
4
3
2
