External Power Supply; Network Side Leds - Polycom ViewStation FX User Manual

Appendix D

External Power Supply

Network Side LEDs

© Polycom, Inc.
The PRI network interface module gets its power from the
ViewStation FX or VS4000 over the P-LINK cable. The FX or
VS4000 must be powered on and booted in order to provide power
to the module. If the FX or VS4000 displays a Softupdate screen, the
FX or VS4000 is not supplying power over the P-LINK cable. You
can connect an external DC power supply to the PRI network
interface module via a connector on the P-LINK side. The external
power supply ensures that the PRI network interface module is
powered even if the P-LINK cable is disconnected, or the FX or
VS4000 is powered off or in boot mode.
For any T1 or E1 PRI network interface modules that are directly
connected to a telephone company switch, it is strongly
recommended that you keep the external DC power supply plugged
in at all times. Another recommendation is that you plug the DC
power supply into the building's electrical power grid via a UPS. This
can prevent the network line from losing signal and going out of sync
with telephone company switch because of a power outage, FX or
VS4000 failure, or a disconnect of the P-LINK cable.
If you use the internal CSU functionality of the T1 PRI network
interface module, you must connect the external power supply.
The NETWORK side of the PRI network interface module has three
vertical LEDs. From the top, the LEDs are red, yellow, and green.
187 ViewStation FX/VS 4000 User's Guide
PRI Technical Notes