Polycom (RMX) 1500 User Manual

Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide 

Polycom, Inc.

The calling endpoints can dial to one, two or several endpoints (up to ten) in one dialing 

string. The dialing string includes the following components:
[MCU Prefix in SIP Proxy] - The prefix with which the RMX is registered to the SIP 

Proxy. This component is optional and is not required in most cases.
[GW Profile ID] - The ID of the Gateway Profile to be used for routing the call to the 

destination endpoint or DMA, as defined in the RMX Gateway Profiles. It includes the 

parameters of the call to the destination.
* - indicates H.323, SIP or ISDN connection protocol to the destination endpoint (followed 

by the appropriate destination number). Placing this delimiter before the destination 

number causes the system to try to connect the endpoint using H.323 first, then SIP and 

lastly ISDN according to the selected protocols.
** - indicates a PSTN connection to the destination endpoint (followed by the appropriate 

destination number).
[Destination number] - the destination number as alias, IPv4 address or ISDN/PSTN 

number. 
[@domain name] - the RMX domain name as registered to the SIP Proxy
The dialing string:
[GW Profile ID]*[Destination Number, first participant]*[Destination 
Number, second participant]**[destination 
number]......*[Destination Number, tenth participant]@domain name
Optional:
[GW Profile ID]*[Destination Number, first participant]*[Destination 
Number, second participant]**[destination 
number]......*[Destination Number, tenth participant]@IP address of 
the RMX signaling host