Cisco TelePresence Administrator's Manual page 444

Reference material
Command reference — xConfiguration
SIP Authentication Digest Nonce Maximum Use Count: <1..1024>
Maximum number of times that a nonce generated by the VCS may be used by a client. Default: 128.
Example: xConfiguration SIP Authentication Digest Nonce Maximum Use Count: 128
SIP Authentication NTLM Mode: <On/Off/Auto>
Controls when the VCS will challenge endpoints using the NTLM protocol. Default: Auto.
Off: the VCS will never send a challenge containing the NTLM protocol.
On: the VCS will always include NTLM in its challenges.
Auto: the VCS will decide based on endpoint type whether to challenge with NTLM.
Example: xConfiguration SIP Authentication NTLM Mode: Auto
SIP Authentication NTLM SA Lifetime: <30..43200>
Specifies the lifetime of NTLM security associations in seconds. Default: 28800.
Example: xConfiguration SIP Authentication NTLM SA Lifetime: 28800
SIP Authentication NTLM SA Limit: <1..65535>
Maximum number of NTLM security associations to store. Default: 10000.
Example: xConfiguration SIP Authentication NTLM SA Limit: 10000
SIP Authentication Retry Limit: <1..16>
The number of times a SIP UA will be challenged due to authentication failure before receiving a 403 Forbidden response. Note that
this applies only to SIP Digest challenges (not NTLM challenges). Default: 3.
Example: xConfiguration SIP Authentication Retry Limit: 3
SIP Domain [1..200] Authzone: <S: 0,128>
The traversal zone to use when delegating credential checks for SIP messages for this domain.
Example: xConfiguration SIP Domain 1 Authzone: "traversalzone"
SIP Domain [1..200] Edge: <On/Off>
Whether remote and mobile collaboration features are enabled. Default Off.
Example: xConfiguration SIP Domain 1 Edge: On
SIP Domain [1..200] Name: <S: 0,128>
Specifies a domain for which this VCS is authoritative. 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 Domain 1 Name: "100.example-name.com"
SIP Domain [1..200] Sip: <On/Off>
Specifies whether 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. Default On.
Example: xConfiguration SIP Domain 1 Sip: On
SIP GRUU Mode: <On/Off>
Controls whether GRUU (RFC5627) support is active. Default: On.
Example: xConfiguration SIP GRUU Mode: On
SIP MediaRouting ICE Mode: <On/Off>
Controls whether the VCS takes the media for an ICE to non-ICE call where the ICE participant is thought to be behind a NAT device.
Default: Off.
Example: xConfiguration SIP MediaRouting ICE Mode: Off
Cisco VCS Administrator Guide (X8.1.1) Page 444 of 507