Subject: From: Date:

RE: [ECS] Phone Interface-C Martin Terry Fri, 14 Jan 2000 07:14:41 -0800

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I recently read in a issue of Nuts-and-Volts magazine that a Radio shack
20ma relay would work just fine to close contacts when the line is off hook.
The only hang up is that the relay coil has to be inserted inline prior to
any phones. The relay is only $1.50.

I bought one but haven't tried it yet. My lines are brought to the backboard
all my automation equipment is on before they go to any instruments in the
house, so this would work well for me.


-----Original Message-----
From: Kevin Keast [mailto:libertyc@prodigy.net]
Sent: Friday, January 14, 2000 7:15 AM
To: ecs-list@netbloc.com
Subject: RE: [ECS] Phone Interface-C


Bill,

I was wondering if that would work.  Radio Shack also has a off/on hook
detector with a simple light.  That should work too, wouldn't you think-as
long as the output doesn't pose a threat to the HV port, right?

Thanks,

Kevin

-----Original Message-----
From:	Bill Walters [mailto:wtwalters@home.com]
Sent:	Wednesday, January 12, 2000 11:08 PM
To:	ecs-list@netbloc.com
Subject:	Re: [ECS] Phone Interface-C

Kevin,

I went to Radio Shack and bought the little "telephone recorder" control
device...  You plug it into any telephone line and it will turn "on" the
motor control line of any cassette recorder...  I simply connected that to
one of my digital inputs....   The device only closes a circuit when it
detects "off hook"...   (I didn't use the other part of the device, the part
which plugs into the microphone of a tape recorder.......)

Bill Walters

----- Original Message -----
From: Kevin Keast <libertyc@prodigy.net>
To: ECS <ecs-list@netbloc.com>
Sent: Tuesday, January 11, 2000 4:38 PM
Subject: [ECS] Phone Interface-C


> Please correct me if I'm wrong....
>
> Phone Interface C CANNOT detect on-hook off hook right?
>
> I have a HV and was thinking of putting together a simple on-hook circuit
to
> input into port B on the HV.
>
> Does anyone do anything else to determine if the phone is in use or not?
>
> Thanks
>
> Kevin
>
>

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