[Freeswitch-users] Help with rxfax debug "T4 expires in phaseT30_PHASE_B_RX"

Wed Apr 20 10:20:26 MSD 2011

Hi,

Once again I am stating my problem:
I am using freeswitch for sending and receiving faxes. Incoming and outgoing
faxes goes through seperate PSTN lines.
Whenever a call lands on freeswitch machine, I execute rxfax(). I get about
5000 fax calls every month, out of which about 800 transmissions fail due to
hangup cause 548 'Disconnected after permitted retries'

Logs of a failed attempt are posted here.
<http://pastebin.com/FTXjkFrP>(This log does not explicitly contain
the failed rxfax() execution. There
are other freeswitch operations happening simultaneously.)

Thanks in advance for your help.
Sadhika

On Tue, Apr 19, 2011 at 7:49 PM, Madovsky <infos at madovsky.org> wrote:

>  JIRA
>
> ----- Original Message -----
> *From:* Sadhika Sharma <sadhika at gmail.com>
> *To:* FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> *Sent:* Tuesday, April 19, 2011 10:13 AM
> *Subject:* Re: [Freeswitch-users] Help with rxfax debug "T4 expires in
> phaseT30_PHASE_B_RX"
>
> Is there a better way to attach logs? I am not sure if attaching them with
> email is good enough.
> Also how do i prefix uuid to mod_spandsp logs?
>
> On Tue, Apr 19, 2011 at 7:15 PM, Sadhika Sharma <sadhika at gmail.com> wrote:
>
>> Thanks Steve for replying,
>>
>> I will explain the problem in clearer terms. Whenever a call lands on
>> freeswitch machine, I exceute rxfax(). I get about 5000 fax calls every
>> month, out of which about 800 transmissions fail due to hangup cause 548
>> 'Disconnected after permitted retries' Complete log is attached.
>>
>>
>> On Tue, Apr 19, 2011 at 6:31 PM, Steve Underwood <steveu at coppice.org>wrote:
>>
>>> Sadhika,
>>>
>>> If you post only a fragment of a log, and describe only half of what
>>> happens, people will generally ignore what you post. I guess they don't
>>> like being treated like they are mind readers.
>>>
>>> The error seems pretty clear. You aren't getting anything from the far
>>> end. Since you give no clue as to what you are doing, beyond trying to
>>> receive FAX, that's about as detailed an analysis as you are going to
>>> get.
>>>
>>> Steve
>>>
>>>
>>> On 04/19/2011 05:43 PM, Sadhika Sharma wrote:
>>> > Anybody having any idea about this?
>>> >
>>> > On Fri, Apr 15, 2011 at 7:36 PM, Sadhika Sharma <sadhika at gmail.com
>>>  > <mailto:sadhika at gmail.com>> wrote:
>>> >
>>> >     Hi,
>>> >
>>> >     I need help in debugging hangup cause 548, 'Disconnected after
>>> >     permitted retries' while attempting rxfax().
>>> >
>>> >     Logs show that T4 expires in phase T30_PHASE_B_RX.
>>> >     T30 PHASE B concerns exchange of DIS/DCS messages. After sending
>>> >     DIS, mod spandsp keeps waiting for DCS and exhausts its retries.
>>> >
>>> >     Please guide me how to debug the root cause of loss of DCS
>>> >     message. Logs are mentioned below:
>>> >
>>> >     2011-03-07 15:53:48.675180 [DEBUG] switch_ivr.c:557
>>> >     OpenZAP/4:1/43851609 Command Execute
>>> >     rxfax(/srv/fax/in/fcf15a4c-48a4-11e0-919e-7bf53bcc3f81.tiff)
>>> >     2011-03-07 15:53:53.334614 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30
>>> >     Send complete in phase T30_PHASE_B_TX, state 17
>>> >     2011-03-07 15:53:53.335619 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30
>>> >     DIS:
>>> >     2011-03-07 15:53:53.335619 [DEBUG] mod_spandsp_fax.c:293 FLOW
>>> >     T.30   .... ...0= Store and forward Internet fax (T.37): Not set
>>> >     2011-03-07 15:53:53.335619 [DEBUG] mod_spandsp_fax.c:293 FLOW
>>> >     T.30   .... .0..= Real-time Internet fax (T.38): Not set
>>> >     :
>>> >     :
>>> >     2011-03-07 15:53:53.875238 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30
>>> >     Start T4
>>> >     2011-03-07 15:53:53.895315 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30
>>> >     HDLC signal status is Carrier up (-2) in state 17
>>> >     2011-03-07 15:53:53.915402 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30
>>> >     HDLC signal status is Carrier down (-1) in state 17
>>> >     2011-03-07 15:53:57.335032 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30
>>> >     T4 expired in phase T30_PHASE_B_RX, state 17
>>> >     2011-03-07 15:53:57.335032 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30
>>> >     Retry number 1
>>> >
>>> >
>>> >     Please guide me how to debug the root cause of loss of DCS message.
>>> >     Thanks,
>>> >     Sadhika
>>> >
>>> >
>>> >
>>> >
>>> > --
>>> > Sadhika
>>> >
>>> >
>>> > _______________________________________________
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>>>
>>>
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>>
>>
>>
>> --
>> Sadhika
>>
>
>
>
> --
> Sadhika
>
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-- 
Sadhika
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