ATLAS 550 System Manual Section 4, User Interface Guide
61200305L1-1F © 2002 ADTRAN, Inc. 149
S/T Option Module.
MODULES (ST-BRI-4) > CONFIGURATION > LINE TERMINATION
Write security: 3; Read security: 5
Termination resistors in both the transmit and receive paths (100 Ω) are required (per CCITT I.430, ETSI
ETS 300012, and ANSI T1.605) for all Basic Rate ISDN (BRI) S/T interfaces operating in NT mode (User
Term) and TE mode (Network Term) in point-to-point applications. ANSI T1.605 provides examples of
S/T interfaces configured in a multi-point NT1 star operation. The NT1 star mode allows a single NT
device to support multiple T interfaces (TE devices). Custom cables are required for this type of
application, and are not available for purchase (from ADTRAN) for the ATLAS 550.
MODULES (ST-BRI-4) > CONFIGURATION > PS1 LINE POWER
Write security: 3; Read security: 5
The ATLAS 550 is capable of providing 1W (at 40 V) power on each Basic Rate ISDN (BRI) S/T interface
to provide line power (phantom power) to TE equipment. Set this parameter to ON only if the TE
equipment connected to the S/T interface requires line power.
MODULES (ST-BRI-4) > TEST
Write security: 5; Read security: 5
These options initiate different types of tests and display test results.
MODULES (ST-BRI-4) > TEST > PRT
Write security: 5; Read security: 5
Identifies the port number. There are 4 available interfaces on the Quad BRI-S/T Option Module.
This parameter should be left in the default state for most applications.
Do not enable line power on a BRI S/T interface configured for TE mode (Network
Term). Setting this parameter to ON in a TE configuration (Network Term) may result
in damage to the module.