# InitiateCallRequestSession
## Properties
Name | Type | Description | Notes
------------ | ------------- | ------------- | -------------
**sdp_type** | **SdpType** | offer for outbound connect; answer for pre_accept/accept (enum: offer, answer) |
**sdp** | **String** | Full SDP (RFC 8866). Replace placeholders with SDP from your WebRTC stack. Must negotiate ICE, DTLS-SRTP, and OPUS for WhatsApp media. |
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