[asterisk-users] Bad Echo between SIP calls

[Alex Crow]

Moj,

Does this mean that even out-of-band DTMF still gets sent
SIP-phone<-->SIP-phone without Asterisk hearing them? (eg RFCxxxx DTMF,
can't remember the number right now)

Forgive me for butting into this thread but this is interesting...

Cheers

Alex


On Tue, 2007-06-12 at 09:21 -0800, Mojo with Horan & Company, LLC wrote:
> theoretically, with canreinvite=yes, it's phone <-> phone.  with 
> canreinvite=no, it's phone <-> asterisk <-> phone.   BUT there are a few 
> reasons which canreinvite=yes will not be this way.  If for example you 
> have a T or a t in the Dial string, asterisk will _remain_ in the media 
> path so it can still detect the DTMF requests for transfer.
> 
> Moj
> 
> Deepak Naidu wrote:
> > Sounds crazy right? even was I, more over support guy logged in unloaded 
> > the zap modules to test them, still an echo.
> > 
> > Ya, I was clear saying that we have SIP--- SIP issue ie internal 
> > extension echo problem.  It seems the echo with SIP--SIP has many 
> > factors.  I am just curios to eliminate any possibility of Asterisk 
> > failing to cancel the echo.
> > 
> > OK, one question here howz the call flow when a SIP---SIP call is 
> > established ie.  is the connection between 2 phones when an Internal 
> > call is made or does the SIP call goes via Asterisk once the SIP--SIP 
> > call is establised.
> > 
> > --
> > Deepak
> > 
> > */Matthew Fredrickson <creslin at digium.com>/* wrote:
> > 
> > 
> >     On Jun 8, 2007, at 6:00 PM, Deepak Naidu wrote:
> > 
> >      > Hi,
> >      >           We have a PRI connection & when its was on test
> >     networks we
> >      > had echo problems withoutside line. 
> >      >
> >      > So I bought a TE212P card resolve the echo problem.  Which did to an
> >      > extent. Its using asterisk 1.2.18 & RHEL4-Update 4.
> >      >
> >      >
> >      > But now when we are live, there is a terrible echo between 2 SIP
> >      > calls. If I call the same extension from outside the voice is clear.
> >      >
> >      > I am not sure whats the problem.  Also there's slight echo when
> >      > calling Digium support.
> >      >
> >      > Totally lost Digium says we need to remove the echo module to
> >     resolve
> >      > SIP echo problems. Then ? the heck we pay for..
> > 
> >     Are you sure that they understood that you were having this problem
> >     between 2 SIP endpoints? That advice only makes sense to test if one
> >     side is Zap and the other side is SIP.
> > 
> > 
> >     ---
> >     Matthew Fredrickson
> >     Software Engineer
> >     Digium, Inc.
> > 
> >     _______________________________________________
> >     --Bandwidth and Colocation provided by Easynews.com --
> > 
> >     asterisk-users mailing list
> >     To UNSUBSCRIBE or update options visit:
> >     http://lists.digium.com/mailman/listinfo/asterisk-users
> > 
> > 
> > ------------------------------------------------------------------------
> > Yahoo! Answers - Get better answers from someone who knows. Try it now 
> > <http://uk.answers.yahoo.com/;_ylc=X3oDMTEydmViNG02BF9TAzIxMTQ3MTcxOTAEc2VjA21haWwEc2xrA3RhZ2xpbmU>. 
> > 
> > 
> > 
> > ------------------------------------------------------------------------
> > 
> > _______________________________________________
> > --Bandwidth and Colocation provided by Easynews.com --
> > 
> > asterisk-users mailing list
> > To UNSUBSCRIBE or update options visit:
> >    http://lists.digium.com/mailman/listinfo/asterisk-users
> _______________________________________________
> --Bandwidth and Colocation provided by Easynews.com --
> 
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
-- 
This message is intended only for the addressee and may contain 
confidential information.  Unless you are that person, you may not 
disclose its contents or use it in any way and are requested to delete 
the message along with any attachments and notify us immediately. 

"Transact" is operated by Integrated Financial Arrangements plc 
Domain House, 5-7 Singer Street, London  EC2A 4BQ 
Tel: (020) 7608 4900 Fax: (020) 7608 1200
(Registered office: as above; Registered in England and Wales under
number: 3727592) 
Authorised and regulated by the Financial Services Authority (entered on
the FSA Register; number: 190856)