User's Manual
Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
110 www.polycom.com
Indicator Lamps on the PRI Network Interface Module
The PRI network interface module uses lamps on both the network 
side and the peripheral side to provide status indications. 
Note
The PRI network interface module is not available with the 
ViewStation EX.
Table 6-1. PRI indicator lamps - Network side
Lamp behavior Meaning
Amber LED on Software update starting: Data is being 
transferred to the PRI network module 
(approximately 90 seconds)
Amber LED and 
green LED on
Software update in progress: The module is being 
updated (a few seconds)
Red LED on 
momentarily.
Software update finishing
T1 only: Yellow LED 
on momentarily.
Software update finishing
Green LED on Software update complete, system synchronized 
with network and fully operational
Red LED blinking No power on the line: network cable is 
unconnected, or upstream switch or PBX port is 
deactivated
Red LED on Network cable is connected and power on the 
line, but no clock syn
Yellow LED blinking E1: Receiving Remote Alarm Indication (RAI) 
from network with Cyclic Redundancy Check 
(CRC) errors
Yellow LED on T1: Waiting for a timer to elapse
E1: Receiving RAI from network with no CRC 
errors










