FAX Send & Receive using OBi110 with Localphone

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bluechip:
Using OBi110 with low-cost Localphone VoIP, on my Windows PC, FAX Send & Receive now work reliably.

The trick is, in Windows lower the "Maximum Port Speed" and reduce the number of "Receive Buffers" & "Transmit Buffers" until FAX transmissions become reliable. The optimum settings are hardware and VoIP dependent.

Reference:
http://yourbusiness.azcentral.com/change-fax-transmission-speed-windows-xp-21403.html

Hope this helps someone else.

bluechip:
This method also works for me with Callcentric. My PC just transmitted a 12 page FAX using Callcentric; it went through, without any errors, on the first try.

 :)

Ostracus:
Be nice if carriers supported T.37 and a capability to connect two T.38 aware endpoints (no ATA).

Some light reading.

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