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LED Indicator
Sys
Stat
Off
Off
No power
Green - 1Hz
Normal
Green - 5Hz
Normal
Green - ON
Green - ON
Normal
Amber - 5Hz
Normal
Green - 1Hz
Local fiber loopback
Amber - ON
Green - 5Hz
Local fiber loopback
Green - ON
Local fiber loopback
Green - 1Hz
Remote fiber loopback initiated
Green - 5Hz
Remote fiber loopback initiated
Amber - 1Hz
Green - ON
Remote fiber loopback initiated
Amber - ON
Remote fiber loopback initiated
Responding to remote fiber
Green - ON
loopback
Amber - 5Hz
Responding to remote fiber
Amber - ON
loopback
Green - 5Hz
Circuit Test (test head) initiated
Alternating
Green & Amber
Green - ON
Circuit Test (test head) initiated
1Hz
Amber - ON
Circuit Test (test head) initiated
Responding to Circuit Test
Green - ON
Alternating
(comparator)
Green & Amber
Responding to Circuit Test
5Hz
Amber - ON
(comparator)
Figure 18: Sys and Stat LED Indicators
Function
Local
Remote
N/A
Not peered with remote (searching)
Peering started with remote, but not complete
Peered with remote
Remote MUX T1/E1 operation mismatch
(one set to T1 and the other MUX set for E1)
Not peered with remote MUX (searching)
Peering started, not completed with remote
Peered with remote MUX
Not peered with remote MUX (searching);
loopback failed
Peering started, but not completed with
remote MUX; loopback failed
Peered with remote MUX; loopback okay
Peered with remote MUX; loopback failed
Peered with remote MUX; loopback okay
Peered with remote MUX; loopback refused
[possible if Copper Loopback is active]
Peering started, but not completed with
remote MUX; circuit test failed
Peered with remote MUX; circuit test okay
Peered with remote MUX; circuit test failed.
LED will turn GREEN when the link is fixed.
Peered with remote Mux; circuit test okay
Peered with remote Mux; circuit test failed.
LED will turn GREEN when the link is fixed.
Page 11
TM3 Transport Module
Verify the LEDs per the table below. LED numbers in parenthesis (#), correspond to the numbers
displayed on the management interface.
LED Function
"Legend"
Power
"PWR" (1)
P1 Link Activity
"100" (2)
P1 Link Activity
"1000" (3)
P1 Link Activity
"100" and "1000" (2 & 3)
Test/Alarm
"Tst/Alm" (6)
Management Mode
"Msr/Slv" (7)
P2 Link Activity
"100" (8)
P2 Link Activity
"1000" (9)
P2 Link Activity
"100" and "1000" (8 & 9)
Figure 19: LED Indicators
Color
Description
OFF: No power applied
Green
ON: Module has power
OFF: Port not linked
ON: Port linked at 100M
Green
Blinking: Data activity
OFF: Port not linked
Green
ON: Port linked at 1000M
Blinking: Data activity
OFF: Port not linked
Green
ON: Port linked at 10M
Blinking: Data activity
Green
Reserved
OFF: Slave mode
Green
ON: Master (normal)
Blinking: Secure Slave
OFF: Port not linked
Green
ON: Port linked at 100M
Blinking: Data activity
OFF: Port not linked
Green
ON: Port linked at 1000M
Blinking: Data activity
OFF: Port not linked
Green
ON: Port linked at 10M
Blinking: Data activity
Page 12
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