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Appendix A Technical specifications 85
Nortel VPN Router Installation — VPN Router 1750
The following table provides the pinouts for the ADSL Annex B cable.
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.
Table 26 ADSL Annex B cable pinouts
RJ-11 termination RJ-45 termination
Signal Pin # to Pin # Signal
N/C 16N/C
Tip 25Tip
Ring 3 4 Ring
N/C 43N/C
Note: Nortel does not supply a cable with the ISDN BRI interface cards.