AT&T 3551 Switch User Manual


 
COMSPHERE 3550 Series Data Service Units
D-2 February 1995 3550-A2-GB20-10
Table D-1
Model 3550 – Digital (DDS) Network 8-Pin Cable Connector Pin Assignments
Pin Circuit Function
1 R1 Transmit data to local loop
2 T1 Transmit data to local loop
7 T Received data from local loop
8 R Received data from local loop
Table D-2
Model 3550 – Dial (Analog) Network 6-Pin Cable Connector Pin Assignments
Pin Circuit Function
3 T Tip – V.32 DBM
4 R Ring – V.32 DBM
Figure D-2. 3600 Hubbing Device (3600-F3-300)