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- Path: sparky!uunet!gatech!hubcap!ncrcae!ncrlnk!ncratl!scscom!jko
- From: jko@atl.scscom.com (Jonathan O'Neal)
- Newsgroups: sci.electronics
- Subject: Need "Phone line in use" circuit
- Summary: see subject
- Keywords: help need phone line in use circuit
- Message-ID: <1992Oct11.173357.29160@atl.scscom.com>
- Date: 11 Oct 92 17:33:57 GMT
- Reply-To: jko@atl.scscom.com
- Organization: SCS/Compute, Inc.
- Lines: 17
-
-
- Greetings, netland. I expect this is a FAQ, but I haven't seen mention of
- it lately. I need to create a device to let me know if a phone line is in
- use (we have modems, a fax, and voices competing for the same line; as you
- know, modems and faxes don't take kindly to being interrupted). I imagine
- it's as simple as an LED attached to a voltage comparator circuit, but I'm
- ignorant of the details of the phone system. A schematic would be great;
- even a detailed description would suffice (I'm hardware-competent). E-mail
- is fine, or post here if you like.
-
- Thanks in advance.
-
- Jonathan O'Neal
- --
- Jonathan O'Neal jko@atl.scscom.com ...!uunet!emory!scscom!jko
- DataScape, Inc. WD4DAR Any opinions expressed are all
- Atlanta, GA (404) 518-8480 mine, not those of DataScape.
-