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- Newsgroups: sci.electronics
- Path: sparky!uunet!stanford.edu!ames!elroy.jpl.nasa.gov!nntp-server.caltech.edu!sergeb
- From: sergeb@cco.caltech.edu (Serge J. Belongie)
- Subject: Need phone line sp
- Message-ID: <1992Sep3.191324.14987@cco.caltech.edu>
- Sender: news@cco.caltech.edu
- Nntp-Posting-Host: sandman
- Organization: California Institute of Technology, Pasadena
- Date: Thu, 3 Sep 1992 19:13:24 GMT
- Lines: 16
-
- Hello,
-
- I need to know some of the specifications for phone line levels, namely:
-
- Vac, Vdc for: Phone Onhook
- Phone Offhook (dialtone)
- Phone Offhook (button pressed)
- Phone Onhook (ring incoming at ??hz)
-
- I have made some rather crude measurements myself with a multimeter,
- but they seem to change each time I measure them. I tried checking
- the CCITT standards ftp sites, but they seem to have all disappeared.
- Any help with this information would be greatly appreciated.
-
- Serge
-
-