Polycom ViewStation EX4000 - Manual (Page 76)

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
ISD N BR I
U -loop
Peripheral Link
ISD N BR I
S/T-loop
Quad N T1
(May not be needed)
PBX
ISD N PR I or
Multiple BR I
Quad BR I
ISD N