Tried to use Net2phone over a dialup modem and the delay was very long
From what I've tried so far only Skype's quality did not come down significantly over dial-up, and that is not guranteed, either. A lot depends on the voice compression and the actual architecture you are using: client-to-server for Net2phone (and other "traditional" VoIP providers) and peer-to-peer for Skype.
I don't recall the actual bandwidth Net2Phone requires for their VoiceLine service, but it is higher than that of a 56K modem.
Babble also claimed it works on dial up, yes it will connect and NO you can't hold a conversation ! Regards, Martin
Set the modem to computer baud rate to 115.2K, 230.4K, or higher. Make sure your modem compression settings are turned on. Shut off any encryption. Shut off PPP (software compression) compression. (see networking/type of dialup connection settings).
(The last two items add significant variability to the dial up connection latency.)
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