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Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
19-4 Polycom, Inc.
Dialing from SIP Endpoints
Figure 19-2Dialing String and Call Flow from SIP Endpoint to One, Two or Three Endpoints
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