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From: kujanpa@ccu.umanitoba.ca
Newsgroups: sci.electronics
Subject: Call number ID
Message-ID: <1991Feb12.224124.12551@ccu.umanitoba.ca>
Date: 12 Feb 91 22:41:24 GMT
Sender: kujanpa@ccu.umanitoba.ca
Distribution: na
Organization: University of Manitoba, Winnipeg, Canada
Lines: 20


	Hi everyone.  A friend has been having problems
with prank phonecalls.  He was wondering if there is a  
circuit/schematic that would display the calling (ie. 
incoming) number.  I know there are commercial units that
will do this, but he is a broke EE student.

The questions are:
1)  Can this be easily done?
2)  What wires are required, and what signals are on these
    wires.
3)  What protocol is used for this?

Thanks in advance!
Bob Kujanpaa

 
 
 Please respond vi e-mail.
kujanpa@ccu.UManitoba.CA