Cisco ASA 5506-X Configuration Manual page 229

Chapter 8 Inspection for Voice and Video Protocols
History for Voice and Video Protocol Inspection
Feature Name
SIP, SCCP, and TLS Proxy support for IPv6
SIP support for Trust Verification Services,
NAT66, CUCM 10.5, and model 8831 phones.
Releases Feature Information
9.3(1) You can now inspect IPv6 traffic when using SIP, SCCP, and
TLS Proxy (using SIP or SCCP).
We did not modify any commands.
9.3(2) You can now configure Trust Verification Services servers
in SIP inspection. You can also use NAT66. SIP inspection
has been tested with CUCM 10.5.
We added the trust-verification-server parameter
command.
Cisco ASA Series Firewall CLI Configuration Guide
History for Voice and Video Protocol Inspection
8-37