User guide

Polycom RMX 1500/2000/4000 Getting Started Guide
2-5
ISDN/PSTN Services
The ISDN/PSTN Network Service is used to define the properties of the
ISDN/PSTN switch and the ISDN lines running from the ISDN/PSTN
switch to the ISDN card installed in the RMX.
Before configuring the ISDN/PSTN Network Service, obtain the
following information from your ISDN/PSTN Service Provider:
•Switch Type
• Line Coding and Framing
•Numbering Plan
•Numbering Type
• Dial-in number range
If the RMX is connected to the public ISDN Network, an external CSU or similar
equipment is needed.