[Freeswitch-users] Question about faxing between FreeSwitch servers

[David Ponzone]

G711 is absolutely unreliable to transmit fax.
RTT has to be perfect, no jitter at all, so basically, LAN recommended.
T38 was invented for that reason.

I personally have more and more success with T38, with FS doing passthrough only:
-from Patton endpoint (SN4961 and others) to Dialogic SS7 gateway
-from Mediatrix endpoints (4102) to Dialogic SS7 gateway
-from Zoiper softphone to Dialogic SS7 gateway

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
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Le 21/05/2011 à 23:01, Meftah Tayeb a écrit :

> T.38 is good but is a pain.
> i strongly suggest you to pass it through PCMU (G.711U) codec, sunse you're willing to use E1 boards
> no transcoding required and less ressources
> thank you
> On 21/05/2011 21:17, Chris Cureau wrote:
>> 
>> Hi, everyone!
>> 
>> I am trying to implement a workable fax solution between two FreeSwitch servers.  This is what I had in mind so far:
>> 
>> T1 PRI <--> Sangoma A102 <--> FreeSwitch (host) <--> T.38 SIP (internet) <--> FreeSwitch (remote) <--> Sangoma B600D <--> FAX machine
>> 
>> I am assuming here that the T.38 protocol between FreeSwitch servers will ensure that the data transfers between the two sites successfully.  Would this actually be a two step process, where one server receives the fax (say, from the PRI) on one call, then sends to the second server, and the second server initiates a second call to the fax machine?
>> 
>> The object here is to successfully pass faxes using SIP.  Is there a better way to handle this?
>> 
>> Thanks in advance,
>> Chris 
>> 
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> 
> 
> -- 
> Meftah Tayeb
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