[SIPForum-discussion] Difference between One and Both way RTP Media

[Dave McBride]

Hi

The SIP 200 OK will be the answer to the initial INVITE. With the 200 OK
and the associated ACK the session has started i.e the call is answered,
and two parties will speak.

The ISUP Progress is sent before the call is answered to indicate that the
called device is ringing, or early media will be played, so one way voice -
from the called party to the calling party is appropriate. We don't care
about the callers voice until the call is answered. ISUP 'progress'
is analogous to SIP 180/183.

Thanks

Dave


On 21 January 2013 11:25, tapender kumar <tapender5002 at gmail.com> wrote:

> Hi All,
>
> Can you explain me abt diffence betwn 1 way and both rtp flow and one way
> and 2 way voice.
> in SIP Messages
>                 200 OK
> -------------------------------------------------------------->
>             Both way RTP Media
> <------------------------------------------------------------>
>
> IN ISUP and ISDN messages as :
>                   Progress
> <----------------------------------
>            one way voice
> <----------------------------------
>
>
>
> *With Regards,*
> *Tapender Kumar*
>
>
>
>
>
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