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Cable Specifications
Synchronous Serial Cable Assemblies and Pinouts
ISDN BRI Port and Cable Pinouts
Table A-13 lists the ISDN BRI port pinouts. The straight-through RJ-45-to-RJ-45
cable, used to connect to the ISDN BRI port, is not included.
Table A-13. BRI Port (RJ-45) Pinout
a. Pins 1, 2, 7, and 8 are not used.
b. TE refers to terminal terminating layer 1 aspects of TE1, TA, and NT2 functional
c. NT refers to network terminating layer 1 aspects of NT1 and NT2 functional groups.
A-20
b
RJ-45
TE
a
8 Pin
3
Transmit
4
Receive
5
Receive
6
Transmit
groups.
c
NT
Polarity
Receive
+
Transmit
+
Transmit
–
Receive
–
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