Cisco TelePresence Administrator's Manual page 429

Reference material
SIP Session Refresh Minimum: <90..7200>
The minimum value the VCS will negotiate for the session refresh interval for SIP calls. For further information
refer to the definition of Min-SE header in RFC 4028.
Default: 500
Example: xConfiguration SIP Session Refresh Minimum: 500
SIP Session Refresh Value: <90..7200>
The maximum time allowed between session refresh requests for SIP calls. For further information refer to the
definition of Session-Expires in RFC 4028.
Default: 1800
Example: xConfiguration SIP Session Refresh Value: 1800
SIP TCP Mode: <On/Off>
Determines whether incoming and outgoing SIP calls using the TCP protocol will be allowed.
Default: On
Example: xConfiguration SIP TCP Mode: On
SIP TCP Outbound Port End: <1024..65534>
Specifies the upper port in the range to be used by outbound TCP/TLS SIP connections.
Default: 29999
Example: xConfiguration SIP TCP Outbound Port End: 29999
SIP TCP Outbound Port Start: <1024..65534>
Specifies the lower port in the range to be used by outbound TCP/TLS SIP connections.
Default: 25000
Example: xConfiguration SIP TCP Outbound Port Start: 25000
SIP TCP Port: <1024..65534>
Specifies the listening port for incoming SIP TCP calls.
Default: 5060
Example: xConfiguration SIP TCP Port: 5060
SIP TLS Certificate Revocation Checking CRL Mode: <On/Off>
Controls whether Certificate Revocation Lists (CRLs) are used to perform certificate revocation checking. CRLs
can be loaded manually onto the VCS, downloaded automatically from pre-configured URIs, or downloaded
automatically from a CRL distribution point (CDP) URI contained in the X.509 certificate.
Default: On
Example: xConfiguration SIP TLS Certificate Revocation Checking CRL Mode: On
SIP TLS Certificate Revocation Checking CRL Network Fetch Mode: <On/Off>
Controls whether the download of CRLs from the CDP URIs contained in X.509 certificates is allowed.
Default: On
Example: xConfiguration SIP TLS Certificate Revocation Checking CRL Network Fetch Mode:
On
Cisco VCS Administrator Guide (X7.2) Page 429 of 498