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Connector Pinouts
25-Pair Telco Connectors
Circuit connections are made at the 25-pair telco connectors. A standard 25-pair
telephone cable with RJ-21X wiring and a male D-type connector at the Compact T1
end is required.
Slot/Pair Designation
The following designations apply whether a Dual, Quad or Octal ISDN BRI Card
is placed in Slot 1 through 6. However, a Dual would only use the first 2 of the 8
pair, a Quad the first 4, and an Octal all 8. The following is the breakdown of
designated pairs to each Compact T1 slot.
SLOT
#1
#2
#3
#4
#5
#6
NOTE:
the Adit, see 25-Pair Telco Connectors, on page 3-9
Compact T1 - Release 6.1
25-Pair Telco Connector
#1 - 8 (first 8 pairs) on J1
# 9 - 16 (next 8 pairs) on J1
# 17 - 24 (next 8 pairs) on J1
#1 - 8 (first 8 pairs) on J2
# 9 - 16 (next 8 pairs) on J2
# 17 - 24 (next 8 pairs) on J2
For the location of the 25-Pair Telco Connectors, on the back of
ISDN BRI Card
Connector Pinouts
9-9
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