Nortel Networks 2750 User Manual

  Appendix A  Technical specifications

NN46110-318 02.01

 provides the pinouts for the ADSL Annex B cable.

The ISDN BRI S/T and ISDN BRI U interface cards have a single RJ-45 
connector that provides the signals needed to interface to ISDN equipment. (To 
connect the ISDN S/T interface to the ISDN network, you must attach an external 
NT-1 device to the RJ-45 connector.)

 shows the ISDN BRI S/T interface card or the ISDN BRI U interface 

card. The two look identical.

ISDN BRI S/T or IDSDN BRI U

The connector on the ISDN BRI S/T and ISDN BRI U interface cards 
accommodates an 8-pin RJ-45 modular patch cord. These cables are sold as 
Category 5, or Ethernet, cables.

ADSL Annex B cable pinouts

N/C

1

6

N/C

Tip

2

5

Tip

Ring

3

4

Ring

N/C

4

3

N/C

Note: Nortel does not supply a cable with the ISDN BRI interface cards.