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Hello!<br>
<br>
Thank You, Steve!<br>
<blockquote
cite="mid:BANLkTim4hoBnmSXjRDyqqU4z7YzQ7s1CnQ@mail.gmail.com"
type="cite">Yes, either that or 200 (you can skip ringing to go
straight to being answered).<br>
<br>
Generally with 183/180 you'll get ringback but not hear voice in
early media, you wouldn't normally hear voice until the 200 OK
answers the call.<br>
<br>
Media can't start up without SDP in the body of the 180/183/200.
SDP contains the IP/port used for media and the selected codec.
Media can't work without those details. Sometimes you'll see
180/183 without SDP there'll still be no early media containing
ringback, in that case the client'll usually generate its own
ringback but you'll always see SDP in the 200 OK.<br>
<br>
-Steve<br>
<br>
<br>
<br>
<br>
<div class="gmail_quote">On 30 June 2011 13:00, Boris Kovalenko <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:boris@tagnet.ru">boris@tagnet.ru</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div text="#000000" bgcolor="#ffffff"> Hello!<br>
<br>
But even reading this RFC, I found that 100 Trying
should be followed by one of 18x response to get media
channels connected, isn't? <br>
<div>
<div class="h5"> <br>
<blockquote type="cite">Btw, this is the latest SIP
spec, better than the draft spec for 183 you posted
before.<br>
<br>
<a moz-do-not-send="true"
href="http://www.ietf.org/rfc/rfc3261.txt"
target="_blank">http://www.ietf.org/rfc/rfc3261.txt</a><br>
<br>
-Steve<br>
<br>
<br>
<br>
<div class="gmail_quote"> On 30 June 2011 09:55, Boris
Kovalenko <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:boris@tagnet.ru" target="_blank">boris@tagnet.ru</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt
0pt 0pt 0.8ex; border-left: 1px solid rgb(204,
204, 204); padding-left: 1ex;">
<div text="#000000" bgcolor="#ffffff"> Hello!<br>
<br>
Yes, this is all. INVITE, 100 and RTP. No other
SIP messages. So my knowledge of SIP if right.
And customer lies to me or forgot to configure
something :)
<div>
<div><br>
<br>
<blockquote type="cite">Is that all the
signalling?<br>
<br>
100 Trying only acknowledges the INVITE.<br>
<br>
That *may* be followed by 183 or 180
which'll indicate ringing. The Cisco would
only be able to send early media if that
was a 183/SDP or 180/SDP.<br>
<br>
The voice will only start when it sends
200/SDP which is when the call is
answered.<br>
<br>
-Steve<br>
<br>
<br>
<div class="gmail_quote">On 30 June 2011
06:00, Boris Kovalenko <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:boris@tagnet.ru"
target="_blank">boris@tagnet.ru</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin: 0pt 0pt 0pt 0.8ex;
border-left: 1px solid rgb(204, 204,
204); padding-left: 1ex;">Hello!<br>
<br>
I have a customers with Cisco 2821
which want to use IVR on it. He<br>
has configured Cisco and told me there
is no voice when number is<br>
called. The configuration is:<br>
<br>
Cisco 2821 <-- FreeSwitch (full
proxy mode) --> PSTN<br>
<br>
I looked at tcpdump and the call flow
is:<br>
FS (INVITE) --> Cisco 2821<br>
Cisco 2821 (100 Trying) --> FS<br>
Cisco 2821 (RTP) --> FS<br>
<br>
I think the call flow is wrong in that
case and SIP100 can not go<br>
throught Freeswitch<br>
(<a moz-do-not-send="true"
href="http://jdrosen.net/papers/draft-donovan-mmusic-183-00.txt"
target="_blank">http://jdrosen.net/papers/draft-donovan-mmusic-183-00.txt</a>)
and there<br>
should be SIP180 to get it work. But
customers said this is OK and he<br>
has no troubles with same
configuration with other provider.
What may I<br>
do in this sutiation? Any specific
Freeswitch configuration?<br>
<br>
P.S. FreeSWITCH Version 1.0.head
(git-1c95ad9 2011-01-20 22-43-50
-0300)<br>
<br>
--<br>
Regards,<br>
Boris<br>
<br>
<br>
<br>
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<pre cols="72">--
С уважением,
Борис Коваленко
ЗАО "Тагнет"
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Regards,
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