[asterisk-users] call drops after a few seconds

Thu Aug 13 09:26:01 CDT 2009

I have googled everything i can on SDP and adding the codec. i can't find anything. do you think something went wrong with the install because this seems like a strange problem to have.

> From: sjones at ftdata.com
> To: asterisk-users at lists.digium.com
> Date: Wed, 12 Aug 2009 16:19:33 -0400
> Subject: Re: [asterisk-users] call drops after a few seconds
> 
> I think I'm missing the beginning of this thread, but I had this exact problem with a Call Manager going to two SIP providers, one of which was BW.COM..  I don't know if it will help, since presumably you're using asterisk, but with the call manager, the problem was that there was no transcoder/MTP available, and it made the call go out without the SDP  (Session Description Protocol) which you notice is missing...
> 
> Giving the call manager an appropriate media resource group list fixed it.  I'm not sure what the equivalent symptom would be caused by on Asterisk, but my guess would be that they're dropping the call because they don't know that it's UDP instead of TCP, and/or they don't know what codec is in use...
> 
> While it's connected, do you get audio path?  Both ways?
> 
> -Steve
> 
> 
> 
> 
> -------------------------------------
> 
> 
> well the good call is from bandwidth.com as example. we haven't had a good call form your office. they all fail. so i tried calling the same external number from each extension the a different external number from all three extension. they all fail. the guy at bandwidth.com just sent us that as a sample of what it should look like.
> ________________________________________
> From: danny at debsinc.com
> To: asterisk-users at lists.digium.com
> Date: Wed, 12 Aug 2009 11:42:07 -0500
> Subject: Re: [asterisk-users] call drops after a few seconds
> So a "good" call works on all 3 lines and a "bad" call fails on all 3?  Are there numbers that alternate between good and bad?
>  
> ________________________________________
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Ott Rose
> Sent: Wednesday, August 12, 2009 11:39 AM
> To: asterisk-users at lists.digium.com
> Subject: Re: [asterisk-users] call drops after a few seconds
>  
> yup just did all the same results
> ________________________________________
> From: danny at debsinc.com
> To: asterisk-users at lists.digium.com
> Date: Wed, 12 Aug 2009 11:14:43 -0500
> Subject: Re: [asterisk-users] call drops after a few seconds
> So you have executed this call scenario:  1-a, 2-a, 3-a, 1-b, 2-b, 3-b, 1-c, 2-c, 3-c and got failure on each of the 9 calls?  And then replicated on the "good" call (1-a,2-a...)?
>  
> ________________________________________
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Ott Rose
> Sent: Wednesday, August 12, 2009 11:08 AM
> To: asterisk-users at lists.digium.com
> Subject: Re: [asterisk-users] call drops after a few seconds
>  
> we have three phones hooked up right now. we have tried on all the different phones and have called several different external numbers. all with the same result.
> 
> > From: danny at debsinc.com
> > To: asterisk-users at lists.digium.com
> > Date: Wed, 12 Aug 2009 10:48:32 -0500
> > Subject: Re: [asterisk-users] call drops after a few seconds
> > 
> > Have you tried to "replicate" the problem (call from a to b 3-5 consecutive
> > times to see if same result)?
> > 
> > -----Original Message-----
> > From: asterisk-users-bounces at lists.digium.com
> > [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Ishfaq Malik
> > Sent: Wednesday, August 12, 2009 10:34 AM
> > To: Asterisk Users Mailing List - Non-Commercial Discussion
> > Subject: Re: [asterisk-users] call drops after a few seconds
> > 
> > I've encountered this issue a couple of times and we managed to resolve 
> > it by updating the sip phone and the router it was connected to both to 
> > use their latest firmware.
> > 
> > I know it's not a definitive answer but I've never truly got down to the 
> > heart of the issue as with us it would affect just one out of 100 or so 
> > extensions.
> > 
> > Ish
> > 
> > Ott Rose wrote:
> > > I have setup my asterisk box using freepbx. I can call extension and 
> > > make outbound calls. the outbound calls drop between 10-30sec. we are 
> > > using bandwidth.com and they have logged our call. below is your bad 
> > > followed by what they say is a good call. I can't figure out where the 
> > > problem is on your end. I know we are missing some stuff at the bottom 
> > > but I don't know where to start.
> > >
> > > **************BAD CALL************************
> > > Wed Aug 5 18:22:28 2009 64.191.130.78:5060 ---> 216.82.224.202:5060
> > >
> > > INVITE sip:+18599484787 at 216.82.224.202 SIP/2.0
> > > Via: SIP/2.0/UDP 64.191.130.78:5060;branch=z9hG4bK20dc2d74;rport
> > > From:"Justin's Face"<sip:200 at 64.191.130.78>;tag=as5d2a3b2a
> > > To:<sip:+18599484787 at 216.82.224.202>
> > > Contact:<sip:200 at 64.191.130.78>
> > > Call-ID: 3ffa6df00137d1923c69ca105bb3d091 at 10.0.0.8
> > > CSeq: 102 INVITE
> > > User-Agent: Asterisk PBX
> > > Max-Forwards: 70
> > > Date: Wed, 05 Aug 2009 18:22:28 GMT
> > > Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
> > > Supported: replaces
> > > Content-Type: application/sdp
> > > Content-Length: 230
> > >
> > >
> > >
> > > ***********GOOD CALL***************************
> > > INVITE sip:+19194393536 at 216.82.224.202:5060 SIP/2.0 
> > > Record-Route:<sip:4.79.212.229;lr;ftag=VPSF506071629460>
> > > Via: SIP/2.0/UDP 4.79.212.229;branch=z9hG4bK8ec1.70782da5.0
> > > Via: SIP/2.0/UDP 
> > > 4.68.250.148:5060;branch=z9hG4bK506071629460-1246361886000
> > > From:"HIX 
> > > INC"<sip:+18592192438 at 4.68.250.148;isup-oli=0>;tag=VPSF506071629460
> > > To:<sip:+19194393536 at 4.79.212.229:5060>
> > > Call-ID: ATLMGC0120090805185238005215 at 209.244.63.45
> > > CSeq: 1 INVITE
> > > Contact:<sip:+18592192438 at 4.68.250.148:5060;transport=udp>
> > > Max-Forwards: 68
> > > Content-Type: application/sdp
> > > Content-Length: 173
> > >
> > > v=0
> > > o=- 1249498358 1249498359 IN IP4 63.215.29.149
> > > s=-
> > > c=IN IP4 63.215.29.149
> > > t=0 0
> > > m=audio 61030 RTP/AVP 0 18 101
> > > a=rtpmap:101 telephone-event/8000
> > > a=fmtp:101 0-15
> > >
> > >
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> > -- 
> > Ishfaq Malik
> > Software Developer
> > PackNet Ltd
> > 
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