ADTRAN Express 3000 SP Informations techniques Page 76

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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 NT 1
(May not be needed)
Quad BRI
ISDN
ISDN BRI
U-loop
Peripheral Link
ISD N BRI
S/T-loop
Quad NT1
(May not be needed)
PBX
ISDN PRI or
Multiple BRI
Quad BRI
ISDN
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