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RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 248
● ISDN Network Service is configured in both MCUs. For more details, Modifying an ISDN/PSTN
Network Service.
● Configuring a Gateway Profile and assigning dial-in ISDN/PSTN numbers. For details, see Defining
the Gateway Profile.
● Configure the Entry Queue or conference (for direct dial-in) as enabled for ISDN connection and a
dial-in number is assigned (for example 54145106).
● Defining the dial-in ISDN participant in MCU B and Dial-out ISDN participant in MCU A (for
MCU-to-MCU cascading conferences).
A dial out ISDN participant is defined (added) to conference A. The participant’s dial out number is
the dial-in number of the Entry Queue or conference running on MCU B (for example 54145106).