Headsets, and the call that only fails one way · Visual
A silent agent
Power
Efficiency Mode is
checked on Windows 11.
PC
Medium
The link is not cellular
or satellite.
Path
TLS
The offer is TLS 1.2 or
better.
Path
USB
The headset is USB, not
analog.
Headset
Wireless
A large floor is not all
on wireless.
Headset
Model
The topology toggle is
used as a picture, not
Admin
Leave the dialer mode alone until the path is honest.
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.
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 1918, private internet addresses
.
rfc
. last checked 2026-10.
RFC 4787, NAT behavior for UDP
.
rfc
. last checked 2026-10.