Re: ACNC Doorbell Fon question

["BruceR" <brNOSPAM@xxxxxxxxxx>]

If a custom ring cadence or a longer ring time is required, contact Paul
at the factory. They have chips available for around $5 that do that.

From:Robert L. Bass
robertlbass@xxxxxxxxxxx

> "Robert Green" <ROBERT_GREEN1963@xxxxxxxxx> wrote in message
> news:aK-dnX9-9MwHvuXfRVn-oQ@xxxxxxxxxx
>> "Robert L. Bass" <robertlbass@xxxxxxxxxxx> wrote in message
>>
>>>> I'm just worried that someone at the front
>>>> door could manage to lock up the phone
>>>> line.
>>
>>> The unit can't actually lock up the phone line.  It doesn't make or
>>> receive calls.
>>
>> I'm just afraid of Mr. Murphy and his law.  I'm sure the designers
>> did not intend any accidental cross-connections to occur, but I'm
>> also sure the guys
>> who designed those hanging walkways for the Hyatt Regency didn't
>> intend for
>> them to collapse when people decided to dance on them!
>
> It wasn't the dancing that did them in.  The supports were
> "re-engineered" by the construction company.  The original
> engineering would have held just fine.  It was a PITA trying to
> assemble long, threaded support rods through the multi-tiered
> walkways.  Someone decided to change the design to make it easier to
> assemble.  The rest is history.
>>> It synthesizes a different ring signal to the inside phones.
>>
>> That's good.  From what I've read each of the two door inputs
>> generates a different ring tone to indicate which door is "ringing"
>> the phone.  I hope the tones are different than the special tones I
>> have for my anonymous call
>> rejection package.
>
> Without hearing your unit I couldn't tell you.  If you want, try one
> out on the bench for a week or two without actually installing it. If
> it doesn't meet your needs I'll take it back.
>
>>> While the alarm is using the phone to report an emergency it kills
>>> the connection to the Doorbell Fon unit and phones.
>>
>> I'm always just a little bit leery of automatic line seizure
>> devices.  I was
>> in a situation once where I was talking to emergency services on the
>> phone when the alarm system decided to seize the line and disconnect
>> us.  It was not a pleasant experience.  I have two lines now, but
>> it's still not a good
>> thing to have happen.  I suppose it's too much to ask of a line
>> seizure device to check and see if a 911 call is already in progress
>> and not to interrupt it if it is.
>
> That would make an interesting project.  It's certainly doable but
> nothing currently on the market that I know of can do it.  Some
> alarms can be programmed to terminate communications and release the
> line if a valid user code is entered at the keypad.  Also, modern
> alarm reporting formats are much faster than what we had to deal with
> a few years ago so interference with voice calls is less of a
> problem.  It's still a valid concern but just not as bad as it used
> to be.
> --
>
> Regards,
> Robert L Bass
>
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