Polycom ViewStation EX User Manual page 120

ViewStation EX User Guide
118
Area Code—This is the area code or STD code used in the area
where the system is located.
Number A—This is the primary ISDN number assigned to the
system.
Number B—This is the secondary ISDN number assigned to the
system.
ISDN Switch Protocol—Select the appropriate ISDN switch
protocols. Contact the ISDN provider to determine the ISDN
switch protocol.
ISDN Number Prefix—This prefix is used to access an outside
line if the system is behind a PBX.
www.polycom.com