Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!casbah.acns.nwu.edu!nucsrl!telecom-request From: tad@ssc.UUCP (Tad Cook) Newsgroups: comp.dcom.telecom Subject: Re: How do You Hook up a Phone For a Play? Message-ID: Date: 3 Mar 91 00:34:34 GMT Sender: news@casbah.acns.nwu.edu (Mr. News) Organization: TELECOM Digest Lines: 23 Approved: Telecom@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 171, Message 9 of 10 Originator: telecom@delta.eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu Nntp-Posting-Host: hub.eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu One important factor when comparing the danger of 20 Hz 100vac with 60 Hz 117vac: The ringing voltage from the phone company is going through a loop that is anywhere from a few hundred to a couple of thousand ohms. You don't have that with the power line. Also, the telco loop is set up to stop sending ringing current immediately when it detects some current draw. Hooking the power line to a wire pair to the phone on stage, you don't have that advantage. Play it safe and do what many film and TV production companies have done ... use a Proctor 46220 Ringdown circuit. With this product, you can even TALK to the actor on stage from an offstage phone, and feed him his lines! The 46220 is $179 from: Proctor & Assoc. 15050 NE 36th St. Redmond, WA 98052-5317 206-881-7000 internet: 3991080@mcimail.com Tad Cook Seattle, WA Packet: KT7H @ N7ENT.#WWA.WA.USA.NA Phone: 206/527-4089 MCI Mail: 3288544 Telex: 6503288544 MCI UW USENET:...uw-beaver!sumax!amc-gw!ssc!tad or, tad@ssc.UUCP