Nortel Passport 4400 Series Hardware Installation Manual page 97

T1/E1 and Digital Voice Modules
Connectors
DSX-1
Interface
Test
RJ48 Interface
Pin 1
RJ48
1 Ring (R)
2 Tip (T)
3
4 Ring 1 (R1)
5 Tip 1 (T1)
6
7
Pins 3, 6, 7, 8 Not Connected
8
Line 1 (DSC-1)
E1 Interface
Connectors
Receive Transmit
Pair Pair
Ω
For 75 Interface
Reserved for future use
Transmit Pair to T1
(Monitor Only)
Figure 9-4. Pin Assignments for T1 Voice Module
Reserved for Future use
DB9 Connector
Ω
For 120 Balanced
pair Interface
Tx Tip
1
2
Rx Tip
3
4
5
Tx Ring
6
7
Rx Ring
8
Pins 2, 4, 5, 7 Not Connected
Figure 9-5. Pin Assignments for E1 Voice Module
Passport 4400 Hardware Installation Manual
Transmit Pair from T1
(Monitor Only)
9-3