Harris Intraplex STL-160 Series - Table 2-1. CM-5 RB Indicator Lights

ACS-160 Series & STL-160 Series T1 Multiplexer Installation & Operation 2 – Functional Description
Version 2.11, August 2011
2-8 Harris Corporation
Intraplex Products
Table 2-1. CM-5RB Indicator Lights
Light Description
TX OUT
(green
Transmit output
ON The transmission signal is normal. It can be a data signal or, if idle, an all-ones signal.
OFF No signal is being transmitted, indicating a hardware failure.
RX IN
(green)
Receive input
ON A data signal is detected at the CM-5RB T1 receiver input.
OFF No signal is detected at the receiver input.
BLINK One of these signals or conditions is detected (seen on the BLNK group display):
Rx11 - A framed or unframed all-ones signal, produced by an idle condition at the far end (an
unframed all ones is a T1 alarm indication signal (AIS))
RxYL - A yellow alarm, indicating a loss of the receive signal at the far end (if the equipment
at the far end is set up to generate a yellow alarm)
XsJt - Excess jitter, indicating the jitter buffer depth has been exceeded. This light might
flash if there is noise on the line.
ERR
(yellow)
Errors
FLASH Light flashes each time a CRC-6 error is detected.
YEL
(yellow)
Yellow alarm
ON An “upstream” failure. Loss of signal detected from an upstream source.
BPV
(yellow)
Bipolar violations
FLASH A light flashes each time a bipolar violation is detected.
ON The random bit error ratio exceeds 10
-5
.
AIS
(yellow)
Alarm Indication Signal
ON An upstream failure has been detected.
FRM
(red)
Out of frame
ON CM-5RB T1 receiver is not in frame synchronization, which might be caused by a high bit
error ratio, the absence of a T1 receive signal, or improper CM-5RB module configuration.
LOOP
(green)
Loop or through timing
On ACS-163 terminal multiplexer
ON The T1 transmitter is loop timed.
BLINK The loop is selected for primary timing, but the module is currently using fallback timing.
On ACS-165 drop and insert multiplexer
ON The T1 transmitter is through timed.
BLINK Through is selected for primary timing, but the module is currently using fallback timing.
INT
(green)
Internal timing
ON The CM-5RB transmitter is using its internal 1.544 MHz clock.
EXT
(green)
External timing
ON The CM-5RB transmitter is using timing provided by an external clock.
BLINK External is selected for primary timing, but the module is currently using fallback timing.
LPBK
(yellow)
Loopback
ON One or more of three internal CM-5RB loopbacks (line, equipment, or payload) is active.