Nortel Passport 4460, Hardware Reference Manual

Page: 49 / 152

Chapter 2 WAN Adapter Modules 49
Reference for Passport 4460 Hardware
ISDN BRI (S/T Interface) Adapter Module
The Single-Port BRI Expansion Module (S/T) cannot be directly connected to the
network and requires connection to an NT1 (Network Terminating unit, type 1),
an external device provided by the phone company. The NT1 accepts a 2-wire
signal and converts it to a 4-wire signal that sends and receives to and from
devices within the home or a business.
The ISDN BRI S/T WAN Module has a single indicator light. The indicator stays
on when the unit is using the D-channel (control and signal information).
Caution: The single-port BRI Expansion Module (S/T) cannot be
directly connected to the network.
Note:
This module is designed to accept an RJ-48 connector; however, it
is compatible with an RJ-45 cable connector.
Note: During diagnostic testing, the indicator blinks on and off.
However, it does not indicate data transfer until you have configured and
enabled software services.
Transmit Data to Network (TX+)
Receive Data from Network (Rx+)
Receive Data from Network (RX-)
Transmit Data to Network (TX-)
Pins 1, 2, 7, 8 Not Connected
1
2
3
4
5
6
7
8
RJ-48 Pin Assignments
ISDN BRI
Pin 1
S/T
Complies with Part 68, FCC Rules
FCC Reg. Number SCNUSA-32845-XD-N
Indicator