[asterisk-users] What are the reasons for VoIP echo?

[Martin]

> You might like to know that a number of people have used the open source
> OSLEC canceller to replace the rather broken one Linksys put in their ATAs.

there's no way to cancel the sip device in Asterisk, is there ? other
than going through zap ...
I wrote once a virtual zaptel driver device that could be used for
this purpose ...

Martin