[Freeswitch-users] T38 unsuccessful: result (48) Disconnected after permitted retries

David Ponzone david.ponzone at gmail.com
Tue Jun 15 08:48:24 PDT 2010 

Just in case, do you know what device is on the other end ?

David Ponzone  Direction Technique
email: david.ponzone at ipeva.fr
tel:      01 74 03 18 97
gsm:   06 66 98 76 34

Service Client IPeva
tel:      0811 46 26 26
www.ipeva.fr  -   www.ipeva-studio.com

Ce message et toutes les pièces jointes sont confidentiels et établis  
à l'intention exclusive de ses destinataires. Toute utilisation ou  
diffusion non autorisée est interdite. Tout message électronique est  
susceptible d'altération. IPeva décline toute responsabilité au titre  
de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes  
pas destinataire de ce message, merci de le détruire immédiatement et  
d'avertir l'expéditeur.




Le 15/06/2010 à 17:41, samuel a écrit :

> I got a pcap file and after the T.38 renegotiation, wireshark  
> reports T.38 Malformed packet from the "originator" A.B.C.D. It  
> sends 3 of these packets and then stops. From freeswitch I just see  
> "Unknown RTP version 0" packets going to A.B.C.D
>
> I attach a png containing the wireshark malformed packet  
> "capture"..apologies in advanced but it's a few Kb and it's the  
> fastest way not to replace all "sensitive" information (IPs,  
> hostnames,etc...). Hope it passes the list filter..
>
>
> On 15 June 2010 17:12, Anthony Minessale  
> <anthony.minessale at gmail.com> wrote:
> did you watch it in a pcap?
> Maybe it's one way audio.
>
>
>
> On Tue, Jun 15, 2010 at 7:03 AM, samuel <samu60 at gmail.com> wrote:
> hi all,
>
> recently testing T.38 unsuccesfully with freeswitch head version  
> (FreeSWITCH Version 1.0.head (git-) ) on a testing server (2.6.26-2- 
> xen-amd64)
>
> remote SDP:
>
> v=0
> o=root 6039 6040 IN IP4 A.B.C.D
> s=session
> c=IN IP4 A.B.C.D
> t=0 0
> m=image 19423 udptl t38
> a=T38FaxVersion:0
> a=T38MaxBitRate:9600
> a=T38FaxFillBitRemoval:0
> a=T38FaxTranscodingMMR:0
> a=T38FaxTranscodingJBIG:0
> a=T38FaxRateManagement:transferredTCF
> a=T38FaxMaxBuffer:72
> a=T38FaxMaxDatagram:72
> a=T38FaxUdpEC:t38UDPRedundancy
>
> freeswitch answer:
> v=0
> o=FreeSWITCH 1276579579 1276579581 IN IP4 W.X.Y.Z
> s=FreeSWITCH
> c=IN IP4 W.X.Y.Z
> t=0 0
> m=image 22230 udptl t38
> a=T38FaxVersion:0
> a=T38MaxBitRate:14400
> a=T38FaxFillBitRemoval
> a=T38FaxRateManagement:transferredTCF
> a=T38FaxMaxBuffer:2000
> a=T38FaxMaxDatagram:400
> a=T38FaxUdpEC:t38UDPRedundancy
> a=T38VendorInfo:0 0 0
>
>
> some debug:
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> T4 expired in phase T30_PHASE_B_RX, state 17
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Too many retries. Giving up.
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Changing from phase T30_PHASE_B_RX to T30_PHASE_D_TX
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T  
> Set rx type 0
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T  
> Set tx type 4
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Changing from state 17 to 3
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Tx:  DCN with final frame tag
> 2010-06-15 13:37:13.234961 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Tx:  ff 13 fa
> 2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Send complete in phase T30_PHASE_D_TX, state 3
> 2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Send complete in phase T30_PHASE_D_TX, state 3
> 2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Disconnecting
> 2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Changing from phase T30_PHASE_D_TX to T30_PHASE_E
> 2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T  
> Set rx type 0
> 2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.38T  
> Set tx type 1
> 2010-06-15 13:37:14.406960 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Changing from state 3 to 2
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:271 FLOW T.30  
> Send complete in phase T30_PHASE_E, state 2
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:301  
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> ======================================================================
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:313 Fax  
> processing not successful - result (48) Disconnected after permitted  
> retries.
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:318 Remote  
> station id:
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:319 Local  
> station id:  SpanDSP Fax Ident
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:320 Pages  
> transferred: 0
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:322 Total fax  
> pages:   0
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:323 Image  
> resolution:  0x0
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:324 Transfer  
> Rate:     14400
> 2010-06-15 13:37:15.634931 [DEBUG] mod_spandsp_fax.c:326 ECM  
> status         off
>
> I've starting learning about T3X and freswitch so I would like  
> whether someone can point me to any doc or any configuration  
> parameter that can solve the issue or at least debug it.
>
> Thanks in advance,
>
> Samuel
>
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>
>
>
> -- 
> Anthony Minessale II
>
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>
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>
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