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- Path: sparky!uunet!think.com!yale.edu!not-for-mail
- From: shaffer-wendy@MINERVA.CIS.YALE.EDU (Wendy Shaffer)
- Newsgroups: sci.electronics
- Subject: Re: Telephone "in use" light
- Date: 9 Jan 1993 22:01:25 -0500
- Organization: Yale University Science & Engineering UNIX(tm), New Haven, CT 06520-2158
- Lines: 9
- Message-ID: <1io3i5INNnat@MINERVA.CIS.YALE.EDU>
- References: <8fHQtP600WAvM1Wc4j@andrew.cmu.edu>
- NNTP-Posting-Host: minerva.cis.yale.edu
-
- Regarding the telephone in use light, the Feb issue of Popular Electronics has
- a schematic. Unfortunately, I'm completely unfamiliar with how the telephone lines
- work.
- The schematic shows two wires going to the telephone line. One of them is marked with the word "Tip" and a + sign. The other is marked with "Ring" and
- a minus sign. Could somebody fill me in on what these mean and how to identify
- one from the other. Thanks
- ---Wendy
- shaffer@minerva.cis.yale.edu
-
-