Yealink SIP-T54S Administrator's Manual page 427

Example of anonymous SIP header:
Via: SIP/2.0/UDP 10.3.20.14:5060;branch=z9hG4bK3074920774
From: "Anonymous" <sip:anonymous@anonymous.invalid>;tag=131654239
To: <sip:1006@10.2.1.48:5060>
Call-ID: 0_288363101@10.3.20.14
CSeq: 1 INVITE
Contact: <sip:1009@10.3.20.14:5060>
Content-Type: application/sdp
Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH,
UPDATE, MESSAGE
Max-Forwards: 70
User-Agent: Yealink SIP-T46G 28.81.0.25
Allow-Events: talk,hold,conference,refer,check-sync
P-Preferred-Identity: <sip:1009@10.2.1.48>
Privacy: id
Content-Length: 302
The anonymous call on code and anonymous call off code configured on IP phones are used to
activate/deactivate the server-side anonymous call feature. They may vary on different servers.
Send Anonymous Code feature allows IP phones to send anonymous on/off code to the server.
Procedure
Anonymous call can be configured using the following methods.
Central Provisioning
(Configuration File)
Web User Interface
Phone User Interface
<MAC>.cfg
Configuring Basic Features
Configure anonymous call.
Parameters:
account.X.anonymous_call
account.X.send_anonymous_code
account.X.anonymous_call_oncode
account.X.anonymous_call_offcode
Configure anonymous call.
Navigate to:
http://<phoneIPAddress>/servlet?p=acc
ount-basic&q=load&acc=0
Configure anonymous call.
401