"Jim Thompson" wrote
in message ...
On Wed, 26 Jan 2011 17:47:50 +0100, Sjouke Burry
wrote:

Jim Thompson wrote:
On Tue, 25 Jan 2011 23:33:36 -0600, flipper
wrote:

On Tue, 25 Jan 2011 14:13:47 -0700, Jim Thompson
wrote:

Anyone have a favorite circuit for a remote telephone ringer?

I have access to the phone line, but no close-by source of power,
so
telephone line-powered or low battery drain.

Commercial purchase also OK.

Suggestions?

...Jim Thompson
Why don't you just get a corded phone? They're cheaper than the
'remote ringer' thingamabobs and have the added 'feature' you can
answer the call.

http://www.amazon.com/Corded-Trimlin...6019740&sr=8-1

I being slightly evasive :-) I need only the ringer, for devious
purposes :-)

But your catch is certainly the cheapest. Thanks!

...Jim Thompson
You should not spy on your spouse and children....

Nope, here's my G-job problem:

800 Number reject boxes blank the first ring. Which keeps you from
seeing CID on your phone.

It occurred to me to use an 800 Number reject box simply as a
controller to disconnect the line from the house phones, let it ring
X-1 times, where X = number of rings to roll to voice-mail, then
seize, then hang-up ;-)

Then, to keep that first ring activating CID on the phone, turn off
local ringer (doesn't stop ringing voltage from initializing CID)...
but add ringer that doesn't ring until the second ring (so that I know
phone is ringing :-)

Devious path to success, eh what ?:-)

(Existing reject box designers haven't yet figured out how to insert
CID after second ring. Shouldn't it be easy enough with a micro?? )

So you only want to dump incoming 800 numbers, but let every thing else
thru.
The CID appears between the first and second rings.
http://www.epanorama.net/documents/telecom/cid_bellcore.html

So you should be able to grab it and determine if the number should be
hung up,
Before the second ring.

Then you need a V.23 1200 baud modem to reinsert the CID after the
second ring.

Sounds like its doable, lotsa time between rings. A PIC would work. You
would need a blocking circuit for when the modem retransmits the CID.
Ma Bell might not be happy with extra CID data on their lines.

Cheers