In message <(E-Mail Removed) .com>,
(E-Mail Removed) writes
>Intermediary to 2 independent phone line.
>
>Caller calls a number of line A, the connected device allows the
>caller to dial a number of line B.
>
www.vikingelectronics.com, their RAD-1device looks to do exactly what
you want (they seem to suggest you will need an amplifier RAD-AMP?)
Also seems to provide security.
If you want to try and rig something yourself take a look at
http://www.sandman.com
Their gadget WAL3A seems to do what you want, but on a single line with
US style 3 way calling. It may be that in their catalogue is what you
need.
I suspect what you are trying to do is frowned on by the average TELCO,
and certainly by the police etc, as it makes call tracing hard. However
if what you are really trying to do is put a VOIP system on one side of
this rig, I think Google will be your friend - try VOIP bridge.
Regards
--
Peter R Cook