Nortel Networks 114200-E manual Isdn BRI S/T Interface

Installing and Operating Passport ARN Routers

ISDN BRI S/T Interface

The ARN supports the BRI standard for ISDN using an optional ISDN/BRI adapter module. The integrated ISDN BRI functionality allows you to connect to the ISDN network over a terminal adapter through an S/T interface.

The BRI implementation supports two dial service applications: dial-on-demand and dial backup. Configuring Dial Services describes these services and how to configure them for connection to an ISDN network.

Table C-9 lists the ISDN interface pin assignments.

Table C-9. ISDN BRI S/T Interface Pin Assignments

Pin Assignment	Pin No.	Signal
	1	Not used
1 2 3 4 5 6 7 8	2	Not used
	3	Tx+ (Transmit to wire)
	4	Rx+ (Receive from wire)
	5	Rx- (Receive from wire)
	6	Tx- (Transmit to wire)
	7	Not used
	8	Not used

C-12 114200-E Rev 00