Section 4, User Interface Guide ATLAS 550 System Manual
128 © 2002 ADTRAN, Inc. 61200305L1-1F
MODULES (T1/PRI-2/4) > CONFIGURATION > LB ACCEPT
Write security: 3; Read security: 5
Sets unit to accept or reject the in-band loop up and loop down codes as defined in ANSI T1.403. This is a
line loopback. Choose either ACCEPT or IGNORE.
MODULES (T1/PRI-2/4) > CONFIGURATION > PULSE DENSITY
Write security: 3; Read security: 5
Choose either ON or OFF. When ON, Pulse Density Enforcer causes the ATLAS 550 to monitor for ones
(1s) density violations and insert a one (1) when needed to maintain ones at 12.5%. This data insertion will
cause data errors.
MODULES (T1/PRI-2/4) > CONFIGURATION > ADLP OVER FDL
Write security: ADTRAN Use Only; Read security: 5
The ADTRAN Data Link Protocol (ADLP) provides a communications link between ADTRAN
equipment over point-to-point or multidrop connections that can be used for configuring and monitoring
remote ADTRAN devices. Choose ENABLE to activate the ADLP over the FDL for the DS1 interface.
MODULES (T1/PRI-2/4) > TEST
Write security: 5; Read security: 5
These options initiate different types of tests and display test results.
MODULES (T1/PRI-2/4) > TEST > PRT
Read security: 5
Displays the port number.
MODULES (T1/PRI-2/4) > TEST > LOC LB
Write security: 4; Read security: 5
Initiates a loopback on near-end (local) port (see Figure 9). The following options are available:
Figure 11. T1/PRI Loopback Test Diagram
LINE Metallic loopback
PAYLD Payload loopback - framing and clocking are regenerated
T1/PRI
DS1
NI CSU
Payload Loopback
Line Loopback