Fw: Ring Wire and DECT

[Gareth Cook <g@xxxxxxxxxx>]

I think modifiying the ring wire is a fruitless excerise in that case.

So - is there a DECT phone with a RS232 port ? :-)  Just want to
programmatically stop the buggers ringing...

G.

Gareth Cook
IT Architect / Project Manager, SWG Sales Europe
Office: +44 (0)1784 445166 - Mobile: +44 (0)7980 445166
email: g@xxxxxxx


----- Forwarded by Gareth Cook/UK/IBM on 10/01/2008 14:32 -----

Discussion
Main Topic

ukha_d@xxxxxxx
Today 13:06

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Subject:
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Re: [ukha_d] Ring Wire and DECT
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Category:



The ringer wire on UK phones was an anti-tinkle mechanism to stop bells
of other extensions "tinkling" when dialling. The ring signal is
presented on a separate, DC isolated, ringer line. Since MF (tone)
dialling is now almost universal there is no issue with tinkling.

Since this was a specifically British solution, imported phones don't
understand the ringer line and since the ring signal is present on the
remaining two wires they work OK using their own isolating capacitor
instead of the one in the master socket.

Older phones, confirming to the BT specification still need the ring wire.

Pete

Gareth Cook wrote:
> All these agents give me blank looks (although i cant see them!) on
the
> telephone - why does a DECT phone ignore the ringer circuit and rings
> anyway, but a BT wired phone in the same socket will not ring when no
> ringer wire is present ?
>
> Is the ringer wire then now redundant on a BT line ? No longer needed
?
>
> G.
>
>  Gareth Cook
>  IT Architect / Project Manager, SWG Sales Europe
>  Office: +44 (0)1784 445166 - Mobile: +44 (0)7980 445166
>  email: g@xxxxxxx
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> IBM United Kingdom Limited - Registered in England and Wales with
number

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