OLE@SRI-NIC.ARPA (Ole Jorgen Jacobsen) (10/19/85)
SRI International: (415) 859-4536 Home: (415) 325-9427 Message-ID: <12152285460.12.OLE@SRI-NIC.ARPA> ReSent-Date: Sun 20 Oct 85 23:33:42-EDT ReSent-From: The Moderator <TELECOM-REQUEST@MIT-XX.ARPA> ReSent-Sender: JSOL@MIT-XX.ARPA ReSent-To: Telecom-Individual-Messages-List: ; ReSent-Message-ID: <12152772599.10.JSOL@MIT-XX.ARPA> I'd like to build a simple circuit that will turn on an LED when a phone line is active. The circuit should be powered by the telco line, withstand ringing voltage and preferably be small enough so as to be mounted behind the RJ11 modular faceplate. The idea is to be able to see that a phone line is in use without picking up another instrument to listen (and cause havoc to a modem/computer). Any smart hardware hackers out there? <OLE> <370> -------
$jch@CLVM.BITNET (Jeffrey C Honig) (10/25/85)
I just received my latest DAK (800-325-0800) catalog which lists an active line indicator for $9.50 + $2 Postage and Handling. It is not line powered, it requires a 9V battery. The descripton implies that it will indicate off-hook anywhere on the phone line. Jeffrey C Honig Clarkson University - Potsdam, NY