<div>lee,</div> <div> </div> <div>Thanks for the feedback.</div> <div> </div> <div>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?</div> <div> </div> <div><A href="http://www.answers.com/topic/t-30-protocol-figure-01-jpg">http://www.answers.com/topic/t-30-protocol-figure-01-jpg</A></div> <div> </div> <div>also, can you recommened a good asterisk compatible ATA adapter with t38 support? i believe cisco has one.</div> <div> </div> <div>Thanks in advance.</div> <div> </div> <div><BR><BR><B><I>Lee Howard <faxguy@howardsilvan.com></I></B> wrote:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#1010ff 2px solid">Christopher Corn wrote:<BR><BR>> May I ask, from your own personal experience. is it not necessaritly <BR>> worth (the headaches) of investing mytime into setting up SPANDSP into <BR>> my asterisk system, but rather invest it into going to a company, like <BR>> packet8 that offers t38 conversion?<BR><BR><BR>I am not really in a position to tell you what something will be worth <BR>to you - especially when I've not even used that something myself. I <BR>know and use spandsp as a library, with IAXmodem and HylaFAX, but I do <BR>not have any experience with spandsp in txfax/rxfax applications or in <BR>its new T.38 gatewaying. I suspect that I'll eventually get into <BR>spandsp's T.38 aspects, but without that I've only had a limited amount <BR>of hands-on exposure to T.38 applications in the form of t38modem and <BR>Cisco gateways (which experience was somewhat disenchanting - mostly <BR>because of the gateway T.30 processing).<BR><BR>If you
have a T.38 fax machine or if you have a T.38-capable ATA <BR>connected to a fax machine and you do not have your own PSTN lines then <BR>I would suspect that it would be worthwhile to use T.38 pass-through on <BR>Asterisk 1.4 or OpenPBX in conjunction with a T.38-supporting FoIP <BR>provider. (Because otherwise you don't have any straight-forward, <BR>reliable means for faxing from your internal fax machines.)<BR><BR>> what does the future of faxing lean towards? before entering an era <BR>> when all fax machines run the t38 protocol. will we see more t38 <BR>> termination services or faxing through g711?<BR><BR><BR>T.38 is the end-all solution for faxing over IP networks. So I suspect <BR>that you will see the pervasiveness of T.38 implementations increase <BR>along with the pervasiveness of VoIP in general. That said, VoIP has <BR>its own fair share of problems that keeps it from being capable of <BR>replacing PSTN circuits entirely, and so as long as those
problems are <BR>not generally resolvable for your average business or service provider <BR>then you'll continue to also see more of the same, traditional, <BR>modem-ing fax machines. So I strongly suspect that you'll see more of <BR>T.38, but I don't think that the PSTN (and traditional fax machines with <BR>it) is going away any time soon.<BR><BR>> from what i've read, using a service that does t38 termination, seems <BR>> to be where i should go.<BR><BR><BR>I would say that it entirely depends upon whether or not you have PSTN <BR>lines yourself. If you do, then I would take whatever efforts you can <BR>to avoid the additional points of T.30 processing/relaying (therefore <BR>avoiding T.38 gatewaying). But if you do not have PSTN lines, then take <BR>whatever efforts you can to properly implement T.38 to your FoIP <BR>provider who will gateway for you.<BR><BR>Lee.<BR><BR>_______________________________________________<BR>--Bandwidth and Colocation provided by
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