Lbk-A" Or "Lbk-B" Is Lit; Ais/Yel" On T1-A Or T1-B Is Lit - ADTRAN TRACER User Manual

P 42
AGE
S 4
ECTION
If problems persist after you have followed the Recommended
Actions, contact ADTRAN Technical Support at (800) 726-8663.
"LBK-A"
This alarm will activate when a software or manual T1 loopback
has been established.
P
OSSIBLE
• A loopback has been commanded from the
VT-100 user interface. .................................................................... 1,2
• The "LBK-A" or "LBK-B" button has been pressed. ....................... 1,2
R
ECOMMENDED
1. Through the VT-100 user interface, deactivate the loopback in the
Loopback Menu.
Press the "LBK-A" or "LBK-B" button to deactivate the loopback.
2.
"AIS/YEL"
The AIS/YEL light will flash for AIS when the DS1/DSX-1 input
receives a "blue code" (a string of 2316 1s with no more than one
zero). The indicator will remain on (solid) if a YEL signal is present
on the T1.
P
OSSIBLE
• For AIS, the DS1/DSX-1 equipment is sending
a "blue code" (all 1s) to the T1 input. ........................................... 1,2
• For YEL, the received T1 is receiving a yellow
signal from the far-end T1, indicating the far-
end T1 is RED. ................................................................................ 3-5
R
ECOMMENDED
Reset the T1 equipment and verify normal operation.
1.
2. Verify the presence of a DS1/DSX-1 signal at the T1 monitor jack
using a T1 test set.
Check the far-end equipment for alarms or a red condition.
3.
Check the T1 connections at the far-end equipment.
4.
5. Reset the far-end equipment.
I M P O R T A N T
"LBK-B"
OR IS LIT
C
AUSE
A :
CTIONS
T1-A T1-B
ON OR
C
AUSE
A :
CTIONS
IS LIT
61280.003L1-1B
R A
ECOMMENDED CTION
(
SEE LIST BELOW
R A
ECOMMENDED CTION
(
SEE LIST BELOW
4/12/99
)
)