Appendix D PRI Technical Notes
ViewStation FX/VS 4000 User’s Guide 188 www.polycom.com
T1 PRI Network Interface Module
The various LEDs indicate the following:
E1 PRI Network Interface Module
The various LEDs indicate the following:
T1 PRI Network Interface Module
Blinking red LED
Either the network cable is not
connected, or the upstream
switch or PBX port is
deactivated, that is, there is no
energy on the line.
Solid red LED
The network cable is connected
and has energy on the line.
However, there is no clock sync.
Solid yellow LED
The PRI network interface
module is receiving clock and
frame sync and waiting for a
timer to elapse. If the clock and
frame sync is lost before the
timer elapses, the yellow LED
goes out and a solid red LED is
displayed.
Solid green LED
The ViewStation FX or VS4000
is fully synchronized with the
network and is ready to use.
E1 PRI Network Interface Module
Blinking red LED
Either the network cable is not
connected, or the upstream
switch or PBX port is
deactivated, that is, there is no
energy on the line.
Solid red LED
The network cable is connected
and has energy on the line.
However, there is no clock sync.
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