Telecommunications

This directory is for files dealing with telephones and other forms of telecommunications.

Files in this directory:

callid.tar.Z
This package contains information on constructing a circuit to deal with caller ID. The 68hc11 executable code expects to be run out of an EPROM residing at C000-FFFF. See the schematics for memory map details. The source hasn't been released at this time, since it is a project in the works. For more information on the project, contact the author at grantb@nait.ab.ca.
faq4phon.doc
This document contains some information on how to keep extension phones from foiling a modem connection, as well as a brief summary of voltages and signals over phone lines.
phoneinuse.asc
This circuit will let you determine if your phone line is in use.


If you have any questions about the Circuit Cookbook archive or these Web pages, please contact Dan Charrois.