Nortel Networks 2750 Isdn BRI interface card, Provides the pinouts for the Adsl Annex B cable

92 Appendix A Technical specifications

Table 27 provides the pinouts for the ADSL Annex B cable.

Table 27 ADSL Annex B cable pinouts

RJ-11 termination		RJ-45 termination
Signal	Pin # to Pin #		Signal
N/C	1	6	N/C
Tip	2	5	Tip
Ring	3	4	Ring
N/C	4	3	N/C

ISDN BRI interface card

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.)

Figure 38 shows the ISDN BRI S/T interface card or the ISDN BRI U interface card. The two look identical.

Figure 38 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.

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

NN46110-318 02.01