8
Appendix A. LED Status Summary
LED / Control
Blinking State
ESBC 8528-4B/9528-4B State
PWR
Steady Green
Device power is on
Off
Device power is off
T1/E1
Steady Green
Indicates synchronized link
Blinking Green
Indicates unit is training
Steady Red
Indicates link is down due to LOS, LFA or RAI
Blinking Red
Indicates T1/E1 cable is unplugged
UPS
Steady Orange
Battery Fully Charged
Blinking Orange
Battery is charging (AC power on)
Steady Green
Battery is in use (AC power off)
Blinking Red
Battery Low (AC power off)
Steady Red
Failed or Bad battery (AC power off)
Off
Battery discharged (AC power off)
BATT-INT
Steady Orange
Battery Fully Charged
Blinking Orange
Battery is charging (AC power on)
Steady Green
Battery is in use (AC power off)
Blinking Red
Battery Low (AC power off)
Steady Red
Failed or Bad battery (AC power off)
Off
Battery discharged (AC power off)
LAN 1-4
Blinking Amber
WhenDataispassedwhilePCisconnectedtoLANEthernet
port
Off
No PC connected to USB or LAN Ethernet ports
PHONE 1-4
Blinking Amber
Theconnectedtelephonehandsetisonthehook(notinuse)
and there are new voice mail messages
Steady Amber
The connected telephone handset is off the hook
Off
Theconnectedtelephonehandsetisonthehook(notinuse)
and there are no new voice mail messages