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Connecting the Expansion Modules Passport 4400 Hardware Installation Manual
4-5
T1 Voice Module (TVM)
Note: Before you can connect this module, the T1 Voice Module
location switch must be set for slot B. If your Passport 4400 unit
has been factory assembled, the switch has already been set for
slot B. Refer to section 6, “Installing Expansion (Data and Voice)
Modules,” for further information.
Figure 4-5. Rear View of the T1 Voice Module
Procedure 7: Attaching cables to the T1 Voice Module
Note: The connections made in this procedure will depend on the specific site
requirements. If you are not sure of the exact connections required for the
Passport 4400 unit, consult your system administrator.
1. Use an RJ48C cable (typically a modular crossover cable) to connect the
DSX-1 port to your local equipment, typically a digital PBX.
For further information about cables and pin assignments, or if you need to
construct special cables to match specific T1 requirements for your site, see
Appendix A, “Cable Diagram Pin Assignments.”
Test
DSX-1
Interface
RJ48 Interface
Pin 1
Transmit Pair to T1
(Monitor Only)
Transmit Pair from T1
(Monitor Only)
Reserved for future use
1
2
3
4
5
6
7
8
Ring (R)
Tip (T)
Ring 1 (R1)
Tip 1 (T1)
Pins 3,6, 7, 8Not Connected
RJ48