Polycom ViewStation EX4000 - Manual (Page 32)

Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
22 www.polycom.com
Quad BRI Network Interface Module
The following paragraphs provide technical information about the
Quad BRI network interface module available with the
ViewStation EX, ViewStation FX, and VS4000 systems.
If you do not connect the system to an internal telephone system
(PBX), you must use a network termination (NT-1) device between
the Quad BRI and the ISDN connection at the wall outlet.
Note
Outside the United States or Canada, service providers or public
telephone utilities generally provide the NT-1 device.
Indicators on the Quad BRI Network Interface Module
Table 2-13 shows the indicator lamp (LED) activity on the Quad BRI
network interface module.
Note
The indicators do not show whether the SPIDs, switch type, and
ISDN numbers have been correctly entered into the endpoint
equipment.
Table 2-13. Quad BRI Indicator Lamps
Indication Meaning
Green LED Off = no connection to the switch, or no clock.
On = clock is synchronized with the switch.
Yellow LED Off = in reset mode, booting
On = active
Both LEDs on Normal operation