Hi,
Kamailio can send OPTIONS only as a probing method in order to determine remote gateways availability.
For example in Dispatcher module you can use OPTIONS requests "dispatcher.html#dispatcher.p.ds_ping_method"
Actually proxy servers never generate OPTIONS requests. 

Regards,


Arsen Semionov

On Fri, Oct 27, 2017 at 3:35 AM, 吴妙灵 <ada_sunshine1@163.com> wrote:
Hello,
  I don't know how to send OPTIONS message from kamailio server to user client,can you give me same advice?

Cheers,
Ada




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