[SIPForum-discussion] Does anybody know the reason why the calling get connected while no ringing in a

[erol turac]

it depends on the your network topology.

configure the remote endpoint to send 183 session progress when it gets
analog alerting signal from FXO or ACM/CPG from C7 network or call
proceeding/alerting message from isdn network.

Rgrds,


On 9/3/07, 大 泥人 <qinglan_zeng at hotmail.com> wrote:
>
>  *Dear erol *
>
> *Can you tell me how to resolve this problem?*
> *Thanks*
> *With Best Regards*
> *Daniel Zeng*
>
>
>
>  ------------------------------
> From:  *"erol turac" <erolturac at gmail.com>*
> To:  *"大 泥人" <qinglan_zeng at hotmail.com>*
> CC:  *discussion at sipforum.org*
> Subject:  *Re: [SIPForum-discussion] Does anybody know the reason why the
> calling get connected while no ringing in a*
> Date:  *Mon, 3 Sep 2007 09:35:09 +0300*
>
>
>  The mandatory messages to establish a session are invite, 200 OK and ACK.
>
>  So, you will not hear any ringback tone unless local EP takes any
> provisional response, like 100 Trying-180 Ringing (can be generated by any
> hop) and 183 Session Progress(end to end).
>
>  Rgrds,
>
>
>  On 9/2/07, 澶?娉ヤ汉 <qinglan_zeng at hotmail.com> wrote:
>
> >   All,
> >
> > Does anybody know the reason why the calling get connected while no
> > ringing in advance?
> >
> >
> >
> > Thanks
> >
> > With Best Regards
> >
> > Daniel Zeng
> >
> >    ------------------------------
> >  From:  *<harini.dhanasekaran at wipro.com>*
> > To:  *<
> > vijaycec at yahoo.co.in>, <discussion at sipforum.org>*
> > Subject:  *Re: [SIPForum-discussion] Response messages & Protocol
> > *
> > Date:  *Sun, 2 Sep 2007 10:13:49 +0530*
> >
> >         Hi Vijay,
> >
> >   Here is the ans for ur first question: diff between 486 and 600
> > response...
> >
> >   Suppose if user A is trying to call user B, then 486 response
> > message is sent by user B in the following situation:
> >    If user B's end system was contacted successfully, but the user B is
> > currently not willing or busy or unable   to take additional calls at this
> > end system.
> >
> >   600 response message is sent by user B during the following situation:
> >      The user B could be available elsewhere, such as through a voice
> > mail service (if user B has registered for it). 600 (Busy
> > Everywhere) response message is sent if the client knows that no other end
> > system(such as voice mail service or call forward to another end system
> > service) will be able to accept this call.
> >
> >   otherwise 486 response message is sent...
> >
> >   in both the cases, user A would hear busy tone on his/her end
> > system...
> >
> >   for the call flows refer:  http://www.tech-invite.com/Ti-sip-service-8.html
> >
> >
> >
> >   Thank you,
> >   Regards,
> >   Harini Dhanasekaran.
> >
> >    ------------------------------
> >  *From:* discussion-bounces at sipforum.org on behalf of Vijay T
> >
> > *Sent:* Sat 9/1/2007 11:37 PM
> > *To:* discussion at sipforum.org
> > *Subject:* [SIPForum-discussion] Response messages & Protocol
> >
> >
> >     Dear ALL
> >      1.What is the difference between 486-Busy Here and 600-Busy
> > Everywhere Response messages....Please tell me some examples..
> >
> >      2.In SIP call flow when TCP come into picture and when it'll be
> > changed from UDP to TCP??explain me with some examples...
> >
> >
> > Thanks & Regards
> > Vijay
> >
> >
> >   ------------------------------
> >  Why delete messages? Unlimited storage is
> > just a click away.<http://in.rd.yahoo.com/tagline_mail_1/*http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/>
> >
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> >
> >
> >  ------------------------------
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> >
> >
>
>
> --
> Erol Tura莽
>
>
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-- 
Erol Turaç
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