[SIPForum-discussion] FAX Issue in VoIP

[kamalraj raj]

hi murali

please check with your operator weather they turn T.38 or G711A

error correction should be turn off  in case of T.38

set the baud rate to 9000

try to remove all high quality setup in your fax machine

in case of H248 you should off T.38

your

kamal

On Sat, Oct 23, 2010 at 11:05 PM, Sam <u2nsam at gmail.com> wrote:

> Hi Murali,
>
> Try using the lowest compatible baud rate
> and if there is buffering mechanism either on freeswitch or the endpoint ,
> increase the buffer.
> Use only g711 codec and remove all codecs from transmitting device, and
> there shouldnt any packet loss while transmitting.
>
> What type of signaling responce you have when the fax fails ?
>
> Regards
> Sam
>
>
>
> On Thu, Sep 9, 2010 at 8:58 AM, murali shankar <murali.elangovan at gmail.com
> > wrote:
>
>> Dear All,
>>
>>             Whenever am trying to send multiple pages in FAX over VoIP at
>> a single attempt the FAX is getting failed .Whereas for the same number the
>> FAX is going fine for single Paper.Can any one help me out?
>>
>> Voip Gateway: Free Switch PBX.
>> Protocol: T.38
>> Codec: G.729A & G.711U
>> Baud rate: 9000 to 14400
>>
>> Errors:
>> 1. Busy Signal Detected.
>> 2.No response to pps repeated 3 times.
>> 3.Failed to train remote modem at 2400 BPS or minimum speed.
>>
>>
>> Please suggest.
>>
>> Regards,
>> Murali
>>
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>
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