From: Jim Thompson
Subject: Re: Ring Phone, SEND CID ???
X-Newsreader: Forte Agent 1.91/32.564
Date: Thu, 19 Dec 2002 17:36:26 GMT
NNTP-Posting-Date: Thu, 19 Dec 2002 12:36:26 EST
Organization: Cox Communications
On Thu, 19 Dec 2002 17:27:31 GMT,
Spehro Pefhany ,
In Newsgroup: alt.binaries.schematics.electronic,
Entitled: "Re: Ring Phone, SEND CID ???",
Wrote the following:
|On Thu, 19 Dec 2002 09:12:39 -0800, the renowned "Richard Crowley"
|>Back in the days of the "color boxes" the old mechanical switches allowed
|>sending info (or actually conversing!) between ring cycles. But my
|>understanding is that modern solid-state switches don't connect the calling
|>and called phones untill the called phone actually goes off-hook. I believe
|>this is impossible with modern phone switches.
My understanding is CID is sent *once* between the first and second
rings. while the phone is *still* on-hook.
|I don't think it's possible to spoof a CID, but from the question it
|sounds like Jim wants to simulate the CO ring and CID signals.
|Conceptually, it's easy- a ring generator (you can buy modules that
|step up low voltage to the 90VAC 25Hz or whatever it is) and the
|appropriate modem signal (1200 baud FSK?) for the CID, and generate
|the desired code, but the devil is in the details.
You're correct, Spehro, I want to ring a phone within the house and
send the CID.
I can find lots of stuff about reading CID, but next to nothing but
specs on how to send it.
[Damn, I can barely type this morning, the cat clearly slept on my
keyboard last night, and black fur strands keep coming up from between
the keys :-]
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
For proper E-mail replies SWAP "-" and "_"
I love to cook with wine. Sometimes I even put it in the food.