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SIP headers

If you’re using a SIP endpoint and you’ve configured your SIP phone to send custom SIP headers starting with X-PH-, Plivo will send these SIP headers with the HTTP request.

Outbound calls

For outbound calls, you can set custom SIP headers while :

Inbound calls

For inbound calls, you need a SIP phone that allows custom SIP headers. If you have one, SIP headers that start with X-PH- will sent as HTTP requests.