SIP Headers

If you are using a SIP endpoint and you have configured your SIP phone to send some custom SIP headers starting with X-PH-, Plivo will send these SIP headers with the HTTP Request.

Outbound Calls

You can set custom SIP headers while :

Inbound Calls

You need a SIP phone allowing custom SIP headers. In this case, SIP headers starting with X-PH- will sent as HTTP Request.