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RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
5-8 Polycom, Inc.
SIP Participants connecting to another IP participant via a Gateway to Gateway call over an
ISDN link enter a dial string using the format:
<Gateway Profile_ID on GW A>@<Central Signaling IP GW
A>*<Destination ISDN Dial-in number assigned to the Gateway Session
Profile GW B>*<Destination Number, participant>
For example:
If Central Signaling IP address of Gateway A is 172.22.177.89, SIP participant dials: 9999@
172.22.177.89* 4444103 and when prompted for the Destination number enters 3456
followed by the pound key (#) using DTMF codes.
Gateway to MCU Calls via ISDN Cascading Link
When H.323 participants connects to a conference/Meeting Room via a Gateway to MCU call
over an ISDN link, the dialing string includes the following components:
The dialing string includes the following components:
[GW A prefix in GK] - the prefix with which Gateway A is registered to the gatekeeper.
[GW Profile ID on GW A] - The ID of the Gateway Profile on GW A to be used for
routing the call to the Meeting Room/conference running on MCU B.
[Conference/Meeting Room/Entry Queue ISDN/PSTN number] - the dial-in
number assigned to the Entry Queue/Meeting Room/Conference defined on MCU B,
including the required country and area codes.
Information required that is not part of the dialing string:
[Destination Conference ID] - Only if using the Entry Queue on MCU B for routing
calls or creating new ad hoc conferences. The ID of the destination conference on MCU B.
The dialing string format:
<GW A Prefix in GK><Gateway Profile_ID on GW A>*<ISDN Number
assigned to the Meeting Room/Conference/Entry Queue>
For Example:
GW A prefix in Gatekeeper - (not used with SIP) 22
Gateway Profile ID in GW A 9999
ISDN Dial-in Number assigned to the
Entry Queue/MR/conference 4444100
H.323 participant dials: 229999*4444100.
SIP participant dials (if Central Signaling IP address of Gateway A is 172.22.177.89): 9999@
172.22.177.89 IP* 4444100.
If dialing an Entry Queue, when prompted for the Destination number enters 3456 followed
by the pound key (#) using DTMF codes to create a new conference or join an ongoing
conference with that ID.
MCU to MCU Calls via ISDN Cascading Link
A dial out ISDN participant is defined (added) to conference A running on MCU 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).
MCU A dials out to an Entry Queue or conference B running on MCU B using the Entry
Queue number (for example 54145106) or the conference number.