Yealink SIP-T2 SERIES Administrator's Manual page 996

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Table of Contents

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones

The following SIP responses are supported:

In the following table, a ―Yes‖ in the Supported column means the header is sent and

properly parsed. The phone may not actually generate the response.

1xx Response—Information Responses

1xx Response

181 Call Is Being Forwarded

183 Session Progress

2xx Response—Successful Responses

2xx Response

202 Accepted

3xx Response—Redirection Responses

3xx Response

300 Multiple Choices

301 Moved Permanently

302 Moved Temporarily

4xx Response—Request Failure Responses

4xx Response

400 Bad Request

401 Unauthorized

402 Payment Required

403 Forbidden

In REFER transfer.