> > That's roughly how it is in the UK at the moment. All devices 'directly
> > or indirectly connected' to the phone system have to be approved. This
> > includes acoustic couplers, BTW, which have to be unable to send certain
> > tones down the line.
> Why? Is the UK public network still using in-band signaling? We can't
> blue box in the states anymore. Most of the switches nationwide have been
> upgraded to digital, out-of-band signaling.
:))
We never could blue box at all here in Germany :( Beside touch tone
dialing ant the unit pulse there has never been any signaling via
the line - and the unit pulse was only send from PBX to the phone.
Payment calculation has always been local within the payphone, back
in the '50s and '60s using relais driven electro mechanical counters
(covered by _real_ metall to avoide any influence thru strong electro
magnets :).
Gruss
H.
--
Ich denke, also bin ich, also gut
HRK
Received on Wed Dec 09 1998 - 12:25:33 GMT