Re: phone tones and Keith Doxey's help?

[Kevin Hawkins <lists@xxxxxxxxxxxxxxxxx>]

I'm sure it's got a proper name but from memory it sounds the same as
the NU  number unobtainable tone at 400Hz I believe - could be wrong though

K

Adrian wrote:
>
> Hi
>
> thought Keith would be the man for this but maybe someone else has the
> knowledge.
>
> short story, after upgrading from comfort 1 alarm system to comfort 2
> (yes, you may have seen this on the comfort tech site but are after
more
> tech detail to help solve this issue), when people leave a message on
> comfort 2's answerphone, it doesnt detect they have hang up and
records
> a continuous tone (comfort 1 never had a problem with this)
>
> so whats this tone called (sounds like dialtone but higher pitched)
and
> what frequency is it at? any weblinks that might explain this?
>
> thanks in advance
>
> Adrian
>
>