Harris Intraplex ACS-160 Series - Diagnostic Functions; T1 Loopback Use (LPBK Group)

6-Testing & Troubleshooting ACS-160 Series & STL-160 Series T1 Mux Installation & Operation
Version 2.11, August 2011
Harris Corporation 6-3
Intraplex Products
Figure 6-3. Y-Series Power Supply, Front View
Table 6-1. Status Indicator Light Summary
Light
Category/
Location Label/Color Description/Indication
T1 Status
(CM-5RB
module)
TX OUT (green) Transmit output is present.
RX IN (green) Receive input is present. Blinks when the receive input signal is all ones, a
yellow alarm, or has excess jitter. Might blink erratically if there is noise on
the line.
ERR (yellow) Errors are detected.
BPV (yellow) Bipolar violations are detected.
FRM (red) T1 signal is out of frame or no signal is being received.
YEL (yellow) Receiving a yellow alarm.
AIS (yellow) Alarm indication signal (all ones).
Timing
(CM-5RB
module)
LOOP (green) Loop timing is active (through timing on a drop & insert multiplexer).
INT (green) Internal timing is active.
EXT (green) External timing is active.
System
status
(CM-5RB
module)
LPBK (yellow) Any internal loopback is active.
CPU (red) The CM-5RB module’s central processing unit has failed.
System
status
(power
supply)
POWER (green) The multiplexer is powered.
NORMAL (green) No alert or alarm is present.
ALERT (yellow) An alert condition exists (Section 6.6.5.1).
ALARM (red) An alarm condition exists (Section 6.6.5.2).
6.3 Diagnostic Functions
The ACS-160 system provides several internal functions that assist in testing and troubleshooting,
which the next sections describe.
6.3.1 T1 Loopback Use (LPBK Group)
The LPBK group activates and deactivates these three T1 loopbacks which the CM-5RB module
provides: