Update an Invite request

[Alt_]

If a call is initiated from a specific internal extension it's required to add one of the following headers to an Invite request:
- Alert-Info: Auto Answer
- Alert-Info: info = alert-autoanswer
- Alert-Info: answer-after = 0 (or Alert-Info: Answer-After = 0)
These headers were taken from Yealink support website.
Which way can I add one of these headers to an Invite request?

 

[Evolute IT]

If a call is initiated from a specific internal extension it's required to add one of the following headers to an Invite request:
- Alert-Info: Auto Answer
- Alert-Info: info = alert-autoanswer
- Alert-Info: answer-after = 0 (or Alert-Info: Answer-After = 0)
These headers were taken from Yealink support website.
Which way can I add one of these headers to an Invite request?

Use the Intercom/Paging feature for auto-answer. You cannot modify the INVITE SDP manually.

 

[JohnS_3CX]

If the goal is to call a destination and have it auto answer, then do like Frederick mentioned and use the Intercom feature of 3CX.

We do not allow modification of INVITEs on the SIP server.