Cisco TelePresence Administrator's Manual page 430

Reference material
SIP TLS Certificate Revocation Checking Mode: <On/Off>
Controls whether revocation checking is performed for certificates exchanged during SIP TLS connection
establishment.
Default: Off
Example: xConfiguration SIP TLS Certificate Revocation Checking Mode: Off
SIP TLS Certificate Revocation Checking OCSP Mode: <On/Off>
Controls whether the Online Certificate Status Protocol (OCSP) may be used to perform certificate revocation
checking. To use OCSP, the X.509 certificate to be checked must contain an OCSP responder URI.
Default: On
Example: xConfiguration SIP TLS Certificate Revocation Checking OCSP Mode: On
SIP TLS Certificate Revocation Checking Source Inaccessibility Behavior: <Ignore/Fail>
Controls the revocation checking behavior if the revocation source cannot be contacted.
Fail: treat the certificate as revoked (and thus do not allow the TLS connection).
Ignore: treat the certificate as not revoked.
Default: Fail
Example: xConfiguration SIP TLS Certificate Revocation Checking Source Inaccessibility
Behavior: Fail
SIP TLS Mode: <On/Off>
Determines whether incoming and outgoing SIP calls using the TLS protocol will be allowed.
Default: On
Example: xConfiguration SIP TLS Mode: On
SIP TLS Port: <1024..65534>
Specifies the listening port for incoming SIP TLS calls.
Default: 5061
Example: xConfiguration SIP TLS Port: 5061
SIP UDP Mode: <On/Off>
Determines whether incoming and outgoing SIP calls using the UDP protocol will be allowed.
Default: Off
Example: xConfiguration SIP UDP Mode: On
SIP UDP Port: <1024..65534>
Specifies the listening port for incoming SIP UDP calls.
Default: 5060
Example: xConfiguration SIP UDP Port: 5060
SystemUnit Maintenance Mode: <On/Off>
Sets the VCS into maintenance mode. New calls and registrations are disallowed and existing registrations are
allowed to expire.
Default: Off
Example: xConfiguration SystemUnit Maintenance Mode: Off
Cisco VCS Administrator Guide (X7.2) Page 430 of 498