Cisco TelePresence Video Communication Server Administrator's Manual page 317

Reference material
SIP Domains Domain [1..20] Name: <S: 0,128>
Specifies a domain for which this VCS is authoritative. The VCS will act as a SIP registrar and Presence Server
for this domain, and will accept registration requests for any SIP endpoints attempting to register with an alias
that includes this domain. The domain name can comprise multiple levels. Each level's name can only contain
letters, digits and hyphens, with each level separated by a period (dot). A level name cannot start or end with a
hyphen, and the final level name must start with a letter. An example valid domain name is "100.example-
name.com".
Example: xConfiguration SIP Domains Domain 1 Name: "100.example-name.com"
SIP Mode: <On/Off>
Determines whether or not the VCS will provide SIP registrar and SIP proxy functionality. This mode must be
enabled in order to use either the Presence Server or the Presence User Agent.
Default: On
Example: xConfiguration SIP Mode: On
SIP Registration Call Remove: <Yes/No>
Specifies whether associated calls are dropped when a SIP registration expires or is removed.
Default: No
Example: xConfiguration SIP Registration Call Remove: No
SIP Registration ExpireDelta: <30..7200>
Specifies the period (in seconds) within which a SIP endpoint must re-register with the VCS to prevent its
registration expiring.
Default: 60
Example: xConfiguration SIP Registration ExpireDelta: 60
SIP Registration Proxy Mode: <Off/ProxyToKnownOnly/ProxyToAny>
Specifies how proxied registrations should be handled.
Off: registration requests will not be proxied.
ProxyToKnownOnly: registration requests will be proxied to neighbors only.
ProxyToAny: registration requests will be proxied in accordance with the VCS's existing call processing rules.
Default: Off
Example: xConfiguration SIP Registration Proxy Mode: Off
SIP Require Duo Video Mode: <On/Off>
Controls whether the VCS will require the use of the com.tandberg.sdp.duo.enable extension for endpoints that
support it.
Default: On
Example: xConfiguration SIP Require Duo Video Mode: On
Cisco VCS Administrator Guide (X6.1) Page 317 of 401