Nortel Networks 1750 manual ISDN BRI interface card

Appendix A Technical specifications 85

The following table provides the pinouts for the ADSL Annex B cable.

Table 26 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 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.)

The following figure shows the ISDN BRI S/T interface card or the ISDN BRI U interface card. The two cards look identical.

Figure 28 ISDN BRI S/T interface card or ISDN BRI U interface card

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.

Nortel VPN Router Installation — VPN Router 1750