800 Series Standalone and 800 Series 1+1 System Installation Guide
16
2.4.3
Connecting to the PSTN
Note
This section only applies to the TMG800 and TSG800 systems.
A TMG800 or TSG800 with 16 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 to convert the line impedance to 75 ohms.
If you are making your own cables, refer to
A.1 “RJ48C Wiring Diagram: Crossover and Straight
51 for crossover or straight cable wiring connections.
Note
All of the 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 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
2.
Repeat step 1, using the next available port.
Figure
2.4
16-Port Interface to the PSTN
15
14
13
12
10 11
8
9
3
2
0
7
6
5
4
1
MGMT0
MGMT1
ETH0
ETH1
VOIP0
VOIP1
Summary of Contents for 800 1+1 series
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