Cisco TelePresence Administrator's Manual page 433

Reference material
Command reference — xConfiguration
H323 Gatekeeper CallSignaling PortRange Start: <1024..65534>
Specifies the lower port in the range to be used by calls once they are established. Default: 15000.
Example: xConfiguration H323 Gatekeeper CallSignaling PortRange Start: 15000
H323 Gatekeeper CallSignaling TCP Port: <1024..65534>
Specifies the port that listens for H.323 call signaling. Default: 1720.
Example: xConfiguration H323 Gatekeeper CallSignaling TCP Port: 1720
H323 Gatekeeper CallTimeToLive: <60..65534>
Specifies the interval (in seconds) at which the VCS polls the endpoints in a call to verify that they are still in the call. Default: 120.
Example: xConfiguration H323 Gatekeeper CallTimeToLive: 120
H323 Gatekeeper Registration ConflictMode: <Reject/Overwrite>
How the system behaves if an endpoint attempts to register an alias currently registered from another IP address. Default: Reject.
Reject: denies the registration.
Overwrite: deletes the original registration and replaces it with the new registration.
Example: xConfiguration H323 Gatekeeper Registration ConflictMode: Reject
H323 Gatekeeper Registration UDP Port: <1024..65534>
Specifies the port to be used for H.323 UDP registrations. Default: 1719.
Example: xConfiguration H323 Gatekeeper Registration UDP Port: 1719
H323 Gatekeeper TimeToLive: <60..65534>
The interval (in seconds) at which an H.323 endpoint must re-register with the VCS to confirm that it is still functioning. Default: 1800.
Example: xConfiguration H323 Gatekeeper TimeToLive: 1800
H323 Gateway CallerId: <IncludePrefix/ExcludePrefix>
Specifies whether the prefix of the ISDN gateway is inserted into the caller's E.164 number presented on the destination endpoint.
Including the prefix allows the recipient to directly return the call. Default: ExcludePrefix.
IncludePrefix: inserts the ISDN gateway's prefix into the source E.164 number.
ExcludePrefix: only displays the source E.164 number.
Example: xConfiguration H323 Gateway CallerId: ExcludePrefix
H323 Mode: <On/Off>
Determines whether or not the VCS will provide H.323 gatekeeper functionality. Default: On.
Example: xConfiguration H323 Mode: On
Interworking BFCP Compatibility Mode: <Auto/TAA/Draft>
Controls the compatibility settings of the SIP to H.323 interworking BFCP component. Default: Auto.
Example: xConfiguration Interworking BFCP Compatibility Mode: Auto
Interworking Encryption Mode: <Auto/Off>
Determines whether or not the VCS will allow encrypted calls between SIP and H.323 endpoints. Default: Auto.
Off: interworked calls will never be encrypted.
Auto: interworked calls will be encrypted if the endpoints request it.
Example: xConfiguration Interworking Encryption Mode: Auto
Cisco VCS Administrator Guide (X8.1.1) Page 433 of 507