Cisco TelePresence Administrator's Manual page 406

Reference material
Registration RestrictionPolicy Service TLS Verify Mode: <On/Off>
Controls X.509 certificate checking and mutual authentication between this VCS and the policy service. When
enabled, the server's FQDN or IP address, as specified in the address field, must be contained within the server's
X.509 certificate (in either the Subject Common Name or the Subject Alternative Name attributes).
Default: On
Example: xConfiguration Registration RestrictionPolicy Service TLS Verify Mode: On
Registration RestrictionPolicy Service UserName: <S: 0,30>
Specifies the user name used by the VCS to log in and query the remote service.
Example: xConfiguration Registration RestrictionPolicy Service UserName: "user123"
ResourceUsage Warning Activation Level: <0..100>
Controls if and when the VCS will warn that it is approaching its maximum licensed capacity for calls or
registrations. The number represents the percentage of the maximum that, when reached, will trigger a warning.
0: Warnings will never appear.
Default: 90
Example: xConfiguration ResourceUsage Warning Activation Level: 90
SIP Authentication Digest Nonce ExpireDelta: <30..3600>
Specifies the maximum time (in seconds) that a nonce may be re-used for.
Default: 300
Example: xConfiguration SIP Authentication Digest Nonce ExpireDelta: 300
SIP Authentication Digest Nonce Length: <32..512>
Length of nonce or cnonce to generate for use in SIP Digest authentication.
Default: 60
Example: xConfiguration SIP Authentication Digest Nonce Length: 60
SIP Authentication Digest Nonce Limit: <1..65535>
Maximum limit on the number of nonces to store.
Default: 10000
Example: xConfiguration SIP Authentication Digest Nonce Limit: 10000
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.
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.
Default: Auto
Example: xConfiguration SIP Authentication NTLM Mode: Auto
Cisco VCS Administrator Guide (X7.1) Page 406 of 479