RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 613
When the flag is set to NO (default), if the Gatekeeper is not functioning, calls from endpoints will be
connected directly to the Entry Queue, Conference or Meeting Room that was dialed.
The method by which dial-in calls are accepted or rejected is dependant on the flag value and the availability
of the Gatekeeper as summarized in the following table.

Enabling or Disabling Direct IP Dialing

The direct IP dialing is enabled by default. To disable it, manually add the flags
GK_MANDATORY_FOR_CALLS_OUT and GK_MANDATORY_FOR_CALLS_IN to the System
Configuration - MCMS_PARAMETERS dialog box and for each flag enter the required value (YES or NO).
For more information on flag definition, see Modifying System Flags.
Calling a SIP Endpoint in a Remote Domain
The Gateway functionality allows the connection of H.323 and SIP endpoints residing in a domain, to SIP
endpoints residing in a remote domain.
This functionality can be enabled when:
The calling endpoint may be H.323 or SIP.
The destination endpoint must be SIP.
The dial string from the calling endpoint to the Collaboration Server includes the gateway dial-out
number of the SIP endpoint that is located in the remote domain.
By definition, a dial-in string cannot contain two domains and it is therefore necessary that the dial string be
of the following format:
mcu-meeting-room*dest%40dest-domain@mcu-domain
Where:
The domain of the gateway call is mcu-domain
The remote destination domain is dest%40dest-domain.
The “%40” is replaced with an “@” when the gateway call is dialed to the remote SIP destination.
GK_MANDATORY_FOR_CALLS_IN - System Flag
Flag Value Gatekeeper Available Results
NO NO Dial-in call is connected bypassing the Gatekeeper.
NO YES Dial-in call is connected using the Gatekeeper.
YES NO Dial-in call is rejected.
YES YES Dial-in call is connected using the Gatekeeper.
For flag changes (including deletion) to take effect, reset the Collaboration Server. For more
information see Resetting the Collaboration Server.