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Ethernet Base Module and Interface Modules Passport 4400 Hardware Installation Manual
5-5
T1 CSU/DSU Interface Module
The T1 CSU/DSU interface module provides a direct T1 or fractional T1
connection to Passport T1 FP or any other compatible device. The T1 connection
provides a larger communication bandwidth than the serial connection.
The T1 CSU/DSU module may only be used in the Port 2 (MPANL port) slot. Do
not place this module in Port 3.
Figure 5-7. Front and Back View of T1 CSU/DSU Interface Module
Note: A T1 Access Voice module interface is also available for use in
Passport 4400 units. Refer to chapter 9 of this manual for
information about the T1 Access Voice module.
An 8-pin RJ48C jack is provided to interface with the T1 network.
Figure 5-8. T1 CSU/DSU Connector
Rear View
Pin 1
RJ48
RJ48 Pin Assignments
1
2
4
5
6
7
8
3
Receive Data from Network
Receive Data from Network
Transmit Data to Network
Transmit Data to Network
Pins 3, 6, 7, 8 Not Connected