ZyXEL Communications IP PBX X6004 User 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