Table 20 Isdn Bri S/T Cable Pinouts; Table 21 Isdn Bri U Cable Pinouts - Nortel Contivity 1740 Installing

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 commonly
sold as Category 5, or Ethernet, cables.
Note: Nortel Networks does not supply a cable with the ISDN BRI
interface cards.
Table 20 provides the ISDN BRI S/T cable pinouts.

Table 20 ISDN BRI S/T cable pinouts

Pin Function
1 N/C
2 N/C
3 Receive +
4 Transmit +
5 Transmit -
6 Receive -
7 N/C
8 N/C
Table 21 provides the ISDN BRI U cable pinouts.

Table 21 ISDN BRI U cable pinouts

Pin Function
1 N/C
2 N/C
3 N/C
4 U interface network connection (tip)
5 U interface network connection (ring)
6 N/C
7 N/C
8 N/C
Appendix A Technical specifications 79
Installing the Contivity 1740