User manual

Installing and Operating BayStack ARN Routers
C-10 114200 Rev. A
ISDN BRI U 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
directly to the ISDN network, through a U interface, as opposed to connecting
over a terminal adapter. This solution reduces equipment costs and simplifies
connection to an ISDN switch.
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.
T
able C-8 lists the ISDN interface pin assignments.
Table C-8. ISDN BRI U Interface Pin Assignments
Pin Assignment Pin No. Signal
1 Not used
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
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