Nortel Networks AN/DC manual Synchronous Interfaces

Installing and Operating AN/DC and ANH-8/DC Systems

Synchronous Interfaces

The AN/DC and ANH-8/DC support two synchronous interfaces, labeled COM1 and COM2. Systems with a Third Synchronous Interface or ISDN BRI upgrade module support a third synchronous port.

The synchronous interfaces provide multiprotocol WAN connection through DB-44 receptacle connectors. Each synchronous interface can operate independently with RS-232, RS-422, V.35, and X.21 electrical interfaces at transmission rates from 1200 b/s to 2.048 Mb/s. When used with standard keyed cables, the ports automatically configure to the desired electrical interface.

You can use the following cables, described in the Cable Guide for Routers and BNX Platforms:

•V.35 connections -- Order No. 7220

•X.21 connections -- Order No. 7224

•RS-422 connections -- Order No. 7318

•RS-232 connections -- Order No. 7826

Table C-5 shows the signal and pin assignments for these connectors.

C-8 312410-A Rev 00