On Sun, Feb 27, 2005 at 04:14:46PM +0800, Steve Underwood wrote: > Questions keep comming up about this, so I started writing something at > http://www.soft-switch.org/foip.html . I think I covered the FAX over > VoIP issues fairly completely. T.37 is pretty simple to explain. There > is rather more to say about T.38, but at least this is a start. If > anyone wants to suggest corrections or additions, just blurt them out.
Hi, I read it and found it very enlightening. I do have one question regarding "Modems don't like relativity". It says modems need a constant delay; is there a limit to what it can handle. For example, would it be possible to configure a jitterbuffer right at the endpoint before the fax to put a constant delay of 1 second relative to the sender. This should be enough time to weed out any jitter. Basically, fix the jitterbuffer so the delay is constant. If a fax can handle a constant delay of up to a second you're home. Maybe also allow people to setup a jitterbuffer to do a special interpolation for fax, which might just amount to sending a special tone representing zeros. Is there a possiblity of creating a app allowing people to configure the jitterbuffer for a particular call? In any case, if it can't be done this way, could you explain why? -- Martijn van Oosterhout Ecomtel Pty Ltd _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
