On Mon, Jun 20, 2011 at 2:43 PM, Bryant Zimmerman <brya...@zktech.com>wrote:
> I concur we use the "h" extension to log inbound faxes to a database and > then we process them outside the asterisk platform. Our biggest issue with > ReceiveFAX is about a 20% t.38 negotiation fail ratio. We then force fall > back to t.30 for the next call from that number. We would like to see better > success with t.38. Today our primary server has had 910 faxes of which 707 > negotiated t.38, 44 have failed darn robo dialers, The rest failed the first > attempt and came in T.30 on the second call > I'm not sure how much of this is the fault of FFA versus the fault of shoddy t.38 implementations out in the wild. I've had a ton of headaches trying to get t.38 solutions implemented with various ITSP's and FFA. I've heard that the free SpanDSP version has better negotiation rates, however, I have not personally tested them. In the end, for mission critical fax applications (yes, these still exist, especially in the financial sector), I tend to go with a dedicated line and DID used in conjunction with an FXO device or T1 device, an IAXModem connection over a local, low-latency LAN, and setup a dialplan pass-through to a hylafax server. -- Thanks, --Warren Selby, dCAP http://www.SelbyTech.com <http://www.selbytech.com>
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