RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 611
[MCU prefix in GK] - the prefix with which the Collaboration Server is registered to the gatekeeper.
[GW Profile ID] - The ID of the Gateway Profile to be used for the gateway call and the IVR message.
The dialing string format is:
[MCU prefix in GK][GW Profile ID]
For example, if the MCU Prefix in the GK is 91 and the GW Profile ID is 2000 enter: 912000.
Once the participant is connected to the Gateway Profile and hears the IVR message requesting the
destination number, using the DTMF input keypad, the participant enters the number of the destination
endpoint followed by the # key. PSTN numbers are identified by an * before the number.
For example, enter 3456# for IP endpoint, or 9253456# for ISDN, or *9253456# for PSTN phone.
To enter an IP address as the destination number, replace the periods (.) with asterisks (*) in the format
n*n*n*n followed by the # key. For example, if the IP address is 172.22.188.22, enter 172*22*188*22#.

Dialing from SIP Endpoints

[MCU prefix in SIP Proxy] - the prefix with which the Collaboration Server is registered to the
gatekeeper. [Optional.]
[GW Profile ID] - The ID of the Gateway Profile to be used for the gateway call and the IVR message.
[@domain name] - the Collaboration Server domain name as registered to the SIP Proxy.
The dialing string:
[GW Profile ID]@domain name
Optional:
[GW Profile ID]@IP address of the Collaboration Server signaling host
Optional:
[MCU prefix in SIP proxy][GW Profile ID]@domain name
Once the participant is connected to the Gateway Profile and hears the IVR message requesting the
destination number, using the DTMF input keypad, the participant enters the number of the destination
endpoint followed by the # key. PSTN numbers are identified by an * before the number.
For example, enter 3456# for IP endpoint, or 9253456# for ISDN, or *9253456# for PSTN phone.
To enter an IP address as the destination number, replace the periods (.) with asterisks (*) in the format
n*n*n*n followed by the # key. For example, if the IP address is 172.22.188.22, enter 172*22*188*22#.
Direct Dialing Using IP Addresses
For Collaboration Servers registered to a gatekeeper, the Collaboration Server can be configured to dial and
receive calls to and from H.323 endpoints using the IP address in the event that the Gatekeeper is not
functioning.

Dial-out Calls

For Dial-out calls, direct IP dialing is enabled or disabled by the GK_MANDATORY_FOR_CALLS_OUT
system flag.