Black Box COMPACT T1 - Manual (Page 40)

36 Compact T1 - Release 6.1
Quick Start
Service Cards
Quad T1 Card
Each channel on the Quad T1 card has two LEDs. The description of the top LED is
shown below, the bottom LED is not used with this application.
V.35/V.54 Card
Each V.35 port has its own LED, as shown in the table below.
State Description
Off Off line
Green Normal
Red Loss of Signal (LOS)
Yellow Bipolar Violation (BPV)
Flashing Green Loopback active
Flashing Yellow Yellow Alarm
(Remote Alarm Indication)
Flashing Red (Slow) Loss of Frame (LOF) or Alarm Indication Signal (AIS)
Flashing Red (Fast) Self-test Failure
State Description
Off No T1 Assignment
Green Normal (CD/RTS) Active
Red CD inactive (T1-side failure)
Yellow RTS inactive (equipment-side failure)
Flashing Yellow Loopback toward T1 or equipment loop test
Flashing Green Loopback toward equipment or network loop test