Q. When sending calls through Commio, is it necessary for our system to include the P-Asserted-Identity or Remote-Party-ID fields in the header of the INVITE?
A. These fields are not required. If you do not pass one of these, we will automatically populate the appropriate header with your FROM header information depending on what the upstream carrier wants. However, if you wish to control privacy you would use either Remote-Party-ID or P-Asserted-Identity. We prefer you to send P-Asserted-Identity. See below for formatting.
Q. How can I block caller id?
A. To block caller ID you would add one of the following headers (change to match your originating ANI). The privacy header tells the far end to mask caller ID.
(E.164 format or 10 digits required, do NOT use 11 digits.)(We prefer P-Asserted-Identity and so do our carriers.) (PAI takes precedence over Remote-Party-ID.)
P-Asserted-Identity: "Sheldon Cooper" <sip:+12125551212@4.4.4.4>
Privacy: id
or
Remote-Party-ID: “Sheldon Cooper” <sip:+19195551212@4.4.4.4>;party=calling;screen=yes;privacy=full
You can NOT relay privacy by only sending a From header.
From: "Sheldon Cooper" <sip:+12125551212@4.4.4.4>
If you would like to review the RFC on this please visit this link:
http://www.ietf.org/rfc/rfc3325.txt
Additional INFO:
Some carriers WILL pass along the "UNKNOWN" field in a FROM/Remote-Party-Id/P-Asserted-Id header. Therefore, it is recommended that you NOT put UNKNOWN in any of these headers. Standard procedure is for the terminating carrier to dip the ANI and provide the correct name however, some carrier switches view the "UNKNOWN" as a privacy attempt and pass it along or do not terminate the call.
Example of what TO do:
From: "name" sip:+19198900000@72.15.219.140;user=phone
Remote-Party-Id: "name" sip:+19198900000@icr.commio.com;user=phone
P-Asserted-Identity: "name" sip:+19198900000@icr.commio.com;user=phone
Example of what NOT to do:
From: "Unknown" sip:+19198900000@72.15.219.140;user=phone
Remote-Party-Id: "Unknown" sip:+19198900000@icr.commio.com;user=phone
P-Asserted-Identity: "Unknown" sip:+19198900000@icr.commio.com;user=phone
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