Matrix SPARSH VP110 User Guide 185
Anonymous Call
You can use anonymous call to block the identity and phone number from showing up to the called party when you
call someone. For example, you want to call to consult some of the services, but don’t want to be harassed. You
can also configure the phone to send anonymous on/off code to the server to activate/deactivate anonymous call
on the server side.
Anonymous call is not available on all servers. Contact your ITSP for the anonymous call on code and off
code.
For advanced users:
Anonymous call allows the caller to conceal the identity information displayed on the callee’s screen. The callee’s
phone LCD screen prompts an incoming call from anonymity.
Example of anonymous SIP header:
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 configuration files or locally.
Via:SIP/2.0/UDP10.2.8.183:5063;branch=z9hG4bK1535948896
From:"Anonymous"<sip:anonymous@anonymous.invalid>;tag=128043702
To:<sip:1011@1 0.2.1.199>
Call‐ID:1773251036@10.2.8.183
CSeq:1INVITE
Contact:<sip:1012@10.2.8.183:5063>
Content‐Type:application/sdp
Allow:INVITE,INFO,PRACK,ACK,BYE,CANCEL,OPTIONS,NOTIFY,REGISTER,SUBSCRIBE,
REFER,PUBLISH,UPDATE,MESSAGE
Max‐Forwards:70
User‐Agent:MatrixSPARSHVP1102.72.0.1
Privacy:id
Supported:replaces
Allow‐Ev
ents:talk,hold,conference,refer,check‐sync
P‐Preferred‐Identity:<sip:1012@10.2.1.199>
Content‐Length:302
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