[Asterisk-Users] Help - is voip good for in-house calls?

[Holger Schurig]

> The other way is to hand off the call to the pstn as soon as you know
> that is where it is headed and just pass the digits to the pstn after
> that. This is called "overlap dialing" and is how most users are used
> to the pstn working. This works for at least the zap channels.

It works also for chan_capi when with the 'b' modifier for 
early-B3-connect.

However, in this case your CDR records only show "0" as the dialled number 
(assuming 0 is the prefix to get to the PSTN).

overlap/early-dial works also with zaphfc, AFAIK.

And it works with GS 101 phones, but, to my current knowledge, not with 
PA168 based phones. For the Sipura SPA-2000 I don't know if it works or 
not. Given the amount of things one can configure, I assume that it would 
work :-)