---------------------------------------- From: "Jeff LaCoursiere" <[email protected]> Sent: Tuesday, September 25, 2012 11:40 AM To: [email protected] Subject: Re: [asterisk-users] T.38 gateway ATA
On 09/25/2012 10:34 AM, Sylvain Rochet wrote: > Hi Jeff, > > > On Tue, Sep 25, 2012 at 10:11:27AM -0500, Jeff LaCoursiere wrote: >> Aha! That is what I am looking for. What firmware rev are you >> using on the 3102? > 5.1.12 on SPA8000, 5.1.10(GW) on SPA3102, there is probably new releases > from Cisco, at the time I builded the T.38 network those were the latest > releases. > > Here is my SPA3102 configuration that I changed or are relevant to FAX/T.38: > > Network Jitter Level: very high > Jitter Buffer Adjustment: disable > Call Waiting Serv: no > Three Way Conf Serv: no > Echo Canc Enable: no > Echo Canc Adapt Enable: no > Echo Supp Enable: no > FAX CED Detect Enable: yes > FAX CNG Detect Enable: yes > FAX Passthru Codec: G711a > FAX Codec Symmetric: yes > FAX Passthru Method: NSE > DTMF Tx Mode: Normal > FAX Process NSE: yes > FAX Disable ECAN: yes > FAX Enable T38: yes > FAX Tone Detect Mode: caller or callee > > Note that my Asterisk is also configured to do Fax Tone Detect and ask > my ATA to switch to T.38 before my ATA ask Asterisk to do so, thereforce > I don't know if ATA Fax Tone Detection work correctly. > > >> So if I am parsing you correctly, the asterisk server the ATA is >> registered to is *also* a T.38 gateway, as you have directly connected >> ISDN? > Yes, this is also a T.38 gateway, my goal was to use T.38 from my ATA to > Asterisk over my non-isochronous IP network. T.38 gateway is supported > since Asterisk >= 10 and you don't need it since you are doing T.38 > passthru, but you need a device somewhere on the path able to detect the > FAX preamble and ask to switch the data channel from ulaw/alaw to T.38. > > > Sylvain > Thanks for the info Sylvain, that is just what I was looking for. Hoping to find that a lower model has the same feature set (don't really need the FXO port)... I am playing with an SPA122 right now, which seems to have the same options available you mention above. I'll load the latest firmware and report my experiences for posterity. Cheers, j Jeff The Grandstream HT-701 (Single Port FXS ATA) is less than $30.00 from dstro. Working well right now. Bryant
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