Nortel Networks 1750 Manual Do Utilizador

Appendix A Technical specifications 85

Nortel VPN Router Installation — VPN Router 1750 

The following table 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 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

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.