TLS, and ports that are not universal · Visual
A firewall request arrives
Which
Is this VCC voice or
Studio?
Ask
Floor
TLS 1.2 is the floor.
TLS
Drop
TLS 1.1 is removed.
TLS
Studio
Studio ports are copied
only for Studio.
Ports
Trunk
The trunk uses its own
guide.
Ports
Label
The rule is labeled so
the next person does not
Admin
Studio media is not every VCC trunk.
Sources and go deeper
Technical requirements PDF
.
vendor
. last checked 2026-10. Fetched for this lab in October 2026. Re-read before you buy hardware or open a firewall.
SIP trunk options chapter
.
vendor
. last checked 2026-10.
IANA service names and port numbers
.
ports
. last checked 2026-10.
RFC 3261, SIP: Session Initiation Protocol
.
rfc
. last checked 2026-10.
RFC 3550, RTP
.
rfc
. last checked 2026-10.
RFC 3551, RTP profile for audio and video
.
rfc
. last checked 2026-10.
ITU-T G.711
.
standard
. last checked 2026-10.
RFC 8446, TLS 1.3
.
rfc
. last checked 2026-10.
RFC 9293, Transmission Control Protocol
.
rfc
. last checked 2026-10.
RFC 768, User Datagram Protocol
.
rfc
. last checked 2026-10.
confirm
. Studio TCP 5061 is described as beta in the PDF read for this lab. Confirm before you depend on it. last checked 2026-10.