In a message dated 96-11-23 21:39:55 EST, you write:

>Modern modems decode caller id directly. The tones occur between the
>first and second ring so no retrain is necessary.
>
>The caller id decoder kits available consist of a Motorola MC145447P
>caller id decoder chip and a MAX232 RS-232 driver. The 145447 could
>be hooked to a pic software or hardware UART (there I mentioned PICs :-)

Are the caller id tones always transmitted or do the local phone companies
block that info unless you buy there service?  Are you only renting the box
when you subscribe to their service?

Mark A. Corio
Rochester MicroSystems, Inc.
200 Buell Road, Suite 9
Rochester, NY  14624
Tel:  (716) 328-5850 --- Fax:  (716) 328-1144
http://www.frontiernet.net/~rmi/

***** Designing Electronics For Research & Industry *****