Black Box COMPACT T1 MT850A - Manual (Page 505)

Compact T1 - Release 6.1 15-7
V.35/V.54 Cards
LEDs
LEDs
Each V.35 port has its own LED, as shown in the table below.
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