[asterisk-users] spandsp (foip)

[Zoa]

linksys spa3102 or 2100 are known to work.
Grandstream also should do it with recent firmware.
Don't be fooled by what is written on the box, lot of ata's out there 
claim t.38. (while the firmware doesnt contain anything related to t.38)

Zoa

Christopher Corn wrote:

> lee,
>  
> Thanks for the feedback.
>  
> in most diagrams explaining t38, it shows, the sending fax machine 
> connecting to a pots before connecting to a gateway,then the 
> internet.  but if i've read and understood correctly, the sending end 
> can use an ATA with t38 support instead of a pots. in that case, where 
> does the packetization of the t30 data happen? at the ATA? level i 
> presume?
>  
> http://www.answers.com/topic/t-30-protocol-figure-01-jpg
>  
> also, can you recommened a good asterisk compatible ATA adapter with 
> t38 support? i believe cisco has one.
>  
> Thanks in advance.
>  
>
>
> */Lee Howard <faxguy at howardsilvan.com>/* wrote:
>
>     Christopher Corn wrote:
>
>     > May I ask, from your own personal experience. is it not
>     necessaritly
>     > worth (the headaches) of investing mytime into setting up
>     SPANDSP into
>     > my asterisk system, but rather invest it into going to a
>     company, like
>     > packet8 that offers t38 conversion?
>
>
>     I am not really in a position to tell you what something will be
>     worth
>     to you - especially when I've not even used that something myself. I
>     know and use spandsp as a library, with IAXmodem and HylaFAX, but
>     I do
>     not have any experience with spandsp in txfax/rxfax applications
>     or in
>     its new T.38 gatewaying. I suspect that I'll eventually get into
>     spandsp's T.38 aspects, but without that I've only had a limited
>     amount
>     of hands-on exposure to T.38 applications in the form of t38modem and
>     Cisco gateways (which experience was somewhat disenchanting - mostly
>     because of the gateway T.30 processing).
>
>     If you have a T.38 fax machine or if you have a T.38-capable ATA
>     connected to a fax machine and you do not have your own PSTN lines
>     then
>     I would suspect that it would be worthwhile to use T.38
>     pass-through on
>     Asterisk 1.4 or OpenPBX in conjunction with a T.38-supporting FoIP
>     provider. (Because otherwise you don't have any straight-forward,
>     reliable means for faxing from your internal fax machines.)
>
>     > what does the future of faxing lean towards? before entering an era
>     > when all fax machines run the t38 protocol. will we see more t38
>     > termination services or faxing through g711?
>
>
>     T.38 is the end-all solution for faxing over IP networks. So I
>     suspect
>     that you will see the pervasiveness of T.38 implementations increase
>     along with the pervasiveness of VoIP in general. That said, VoIP has
>     its own fair share of problems that keeps it from being capable of
>     replacing PSTN circuits entirely, and so as long as those problems
>     are
>     not generally resolvable for your average business or service
>     provider
>     then you'll continue to also see more of the same, traditional,
>     modem-ing fax machines. So I strongly suspect that you'll see more of
>     T.38, but I don't think that the PSTN (and traditional fax
>     machines with
>     it) is going away any time soon.
>
>     > from what i've read, using a service that does t38 termination,
>     seems
>     > to be where i should go.
>
>
>     I would say that it entirely depends upon whether or not you have
>     PSTN
>     lines yourself. If you do, then I would take whatever efforts you can
>     to avoid the additional points of T.30 processing/relaying (therefore
>     avoiding T.38 gatewaying). But if you do not have PSTN lines, then
>     take
>     whatever efforts you can to properly implement T.38 to your FoIP
>     provider who will gateway for you.
>
>     Lee.
>
>     _______________________________________________
>     --Bandwidth and Colocation provided by Easynews.com --
>
>     asterisk-users mailing list
>     To UNSUBSCRIBE or update options visit:
>     http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
>------------------------------------------------------------------------
>
>_______________________________________________
>--Bandwidth and Colocation provided by Easynews.com --
>
>asterisk-users mailing list
>To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>  
>