Polycom 1500 Administrator's Manual page 1049

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator's Guide
6 In the Target Regular Expression field enter ^ and the MCU prefix as defined in the gatekeeper. This
prefix is also defined in the Collaboration Server IP Network Service.
For example, if 11 is the Collaboration Server prefix defined in gatekeeper, enter ^11. The circumflex
expression "^11" causes this route to be applied to all numbers starting with "11".
If you have not defined such a prefix in the IP Network Service in the Collaboration Server
configuration, you can add it later, using value entered here.
7 In the Gateways - Addresses box, click the Add button.
Polycom®, Inc. 1017