SDM-9220/9230 - Comtech EF Data

5.9.7 T1/E1 and ISDN-BRI S/T Interface Cards
Product Description
Use an RJ-48 cable for T1/E1 (E1-120) and ISDN-BRI S/T connections. This cable is a
standard unshielded twisted pair (UTP) male-male cable with RJ-48 connectors.
NOTE: One RJ-48 to RJ-48 cable is provided for each physical digital port on the T1/
E1 and ISDN-BRI S/T interface cards.
TE Mode NT Mode
Pin No. Signal Pin No. Signal
1 Receive (+) 1 Transmit
2 Receive (-) 2 Transmit
3 (not used) 3 (not used)
4 Transmit (+) 4 Receive
5 Transmit (-) 5 Receive
6 (not used) 6 (not used)
7 (not used) 7 (not used)
8 (not used) 8 (not used)
Table 5-10: RJ-48 pinout for single/dual port T1/E1 interface cards
Pin No. Description
1 Power (+)
2 Power (-)
3 Transmit (+) Output
4 Receive (+) Input
5 Receive (-) Input
6 Transmit (-) Output
7 Power (-)
8 Power (+)
Table 5-11: RJ-48 pinout for ISDN-BRI S/T interface card
Memotec Inc. 5-29