It indicates you plan to have 2-way audio, so yes. Omitting it entirely should default to sendrecv.

Can you enlighten us on what the actual problem you're having is?

-Steve


On 4 April 2013 04:34, Thomas Lee <thomas.lee@octon.net> wrote:
Hi,

It's SIP re-INVITE problem.

Is it necessary for adding "a=sendrecv" on SDP field, when we're doing
re-INVITE procedure?

Thanks

Regards,
Thomas Lee






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