Re: Entry phone door release - PAL WinTec

[nick markowitz <nmarkowitz@xxxxxxxxx>]

On Sep 1, 2:41=A0pm, Jim <alarmi...@xxxxxxx> wrote:
> On Sep 1, 1:23=A0pm, "Bob La Londe" <nos...@xxxxxxxxx> wrote:
>
>
>
> > Look up "DoorBell Fon" by ANAC. =A0They have been selling a unit that d=
oes
> > this for atleast ten years. =A0I have a couple on the shelf in the shop=
.
>
> > "PeterD" <stillcen...@xxxxxxxxxxxxxx> wrote in message
>
> >news:ed20732d-62ee-4bb7-89cf-4cee6b674f51@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=
.
>
> > > Pal WinTec offer a neat entry phone system. =A0It introduces a ring
> > > tone, from a visitor pressing a button on the door panel, to all
> > > ordinary phones in the house including cordless ones. =A0You can then
> > > answer it and talk to the visitor, and activate the door lock release
> > > if you want to let them in. =A0It can work with more than one door eg
> > > front door and back door, using their PAL 102 system.
>
> > > At least, that's what they claim. =A0But their documentation is poor
> > > (the only detail is in Hebrew, not English!) and the system expects
> > > telephone wires to be only a single pair, ie 2 wires, and does not
> > > provide a standard plug to take the incoming phone or to output to th=
e
> > > cordless box. =A0Here in England, all the phone lines end with 4 wire=
s,
> > > and don't seem to work with the WinTec 2-wire assumption
> > > - any advice on how to connect them would be very welcome!
>
> > 4 wires? =A0Are you sure they actually use 4 wires? =A0The standard was=
 to
> > provide 4 wires for ages, but here in the States we only use 2 wires fo=
r
> > most applications. =A0Not at all sure how you Atlantic islanders implem=
ent
> > telephone, but most modern phones only use two wires. =A0Some ancient 2=
 party
> > lines used three. =A0Line on 2 and tip to ground and ring to ground for
> > separate ringing voltage. =A0Not sure maybe some weird form of ground s=
tart
> > line with a separate ring to ground?
>
> > There are some UK techs that visit this group once in a while. =A0Maybe=
 one
> > can take the time to educate us.
>
> I know this is from ancient history but a LONG time ago, there was
> what I think was called the "Princess" phone that required 4 wires. I
> believe the extra two wires were used to power a light behind the
> dialing mechanism. They may be doing something like that with the
> extra two wires.

Only  phone which requires 4 wires I can think of is ones used on a
key system unit  red/green voice yellow /black power/data