Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
66 www.polycom.com

Figure 3-2. Network Configuration (No PBX)

Figure 3-3. Network Configuration (Behind PBX)

For ISDN BRI lines to be used from a PBX to a videoconferencing

system, you must do these things in addition to meeting the other

requirements.

❑Determine the interface type of the ISDN BRI network module

in the PBX (U-loop or S/T-loop). This will determine whether or

ISDN BRI
U-loop
Peripheral Link
ISDN BRI
S/T-loop
Quad NT1
(May not be needed)
Quad BRI
ISDN
ISDN BR I
U-loop
Peripheral Link
ISDN BR I
S/T-loop
Quad NT1
(May not be needed)
PBX
ISDN PR I or
Multiple BRI
Quad BRI
ISDN