[SIPForum-discussion] Require: timer in the INVITE

[Zuñiga, Guillermo]

Hi Fellows.

I am having a issue with some calls are negotiating to a fax call with t38 when I am getting the Re-Invite(t38)
I am seeing that invite have the following Header Requiere: timer. And my SBC is rejecting with 420 bad extension( I found the way to solve this in my SBC).
But really I would like to know if is correct that Carriers send me the Re-invite with this Header when we are negotiating the fax call?
What is used this header?
There is any relationship between Requiere Timer and the others Headers(Supported: timer, Session-Expires?) that are coming in the Re-Invite?

Thanks for help me understand better this headers.

Regards
Guillermo




Guillermo Zuniga
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Gerencia de Soporte Técnico

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