IP and Softphone on Dialup?

[boodox]

Hi,

I've managed to get a 7960 IP and IP SoftPhone to work very well on Cable and ADSL VPN connections but I'm wondering whether it's possible to do the same on an ISDN or 56k dial-up connection.

I haven't tried it on a IP phone yet (if it's possible at all) but I have got a IP SoftPhone "sort of" running on a 56K dialup (by that I mean I have "one-way" audio where the party running the SoftPhone can be heard by the other but they can't hear the other caller themselves - as far as I can see, all the settings and requirements are correct and it is running G.729 compression which should be ample)

Does anyone have any ideas or suggestions on how to get either working? It would really be appreciated.

Many Thanks!

bdx

 

[VOIPeng]

The major problem with dialup is the delay is very high over the 100 msec needed for decent sounding Voice quality, not the actual pipe size. With G.729 the bandwidth is there, but delay makes VOIP over dialup impossible. I know Avaya has a dual connect IP Softphone, that allows you to do all call control via dialup connection and the actual talk path is via you analog or cell phone. This is the solution I recommend for people who want remote access via dialup. Thank you,
Frank Mirecki