ZyXEL Communications IP PBX X6004 - Manual (Page 47)

Chapter 1 Introduction
X6004 User’s Guide
47
RAI
(Remote
Alarm
Indication) Yellow On The remote device receives the ISDN physical layer
alarm from the X6004 and responds with this alarm.
Off The ISDN physical layer is operating properly without
any remote alarms.
AIS (Alarm
Indication
Signal) Yellow On The X6004 detects an ISDN physical layer issue and
sends this local alarm.
Off The ISDN physical layer is operating properly without
any local alarms.
L2 (Layer 2) Green On The link is connected and able to receive signals.
Off The link is down.
Blinking The system is booting up or at least one voice
connection is active.
All 4 LED Blinking System fails.
Off There is a system configuration error.
Table 1 LEDs (continued)
LED
COLO
R
STATUS DESCRIPTION