Ultra-Wan Csu/Dsu Leds; T3/Hssi Serial Leds - 3Com 3C8S5007 - SuperStack II PathBuilder S500 Switch User Manual

Ultra-WAN CSU/DSU
LEDs
Carrier
Alarm
Lpbk
4D
Normal operation

T3/HSSI Serial LEDs

Link
Active
Fault
Normal operation
The following figure describes the Ultra-WAN CSU/DSU LEDs.
Carrier
Alarm
Lpbk
The following figure describes the T3/HSSI serial LEDs.
Lights green when the path is up.
Link
Lights green when there is a physical connection to a serial
Active
device such as a CSU/DSU or modem.
Unlit in normal operation. Lights amber if an error in the
Fault
frames is detected.
Lights green when frame synchronization to an E1 or
T1 frame structure is achieved.
Lights amber if an AIS, RAI, or FEBE condition exists.
Lights amber if a connector-level loopback is in
progress.
Normal LED Meanings 117