Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!bellcore!texbell!vector!telecom-gateway From: OLE@csli.stanford.edu (Ole J. Jacobsen) Newsgroups: comp.dcom.telecom Subject: (Non) Ringing phones Message-ID: Date: 12 Jun 89 12:22:43 GMT Sender: news@vector.Dallas.TX.US Lines: 16 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 196, message 4 of 6 Phones depend on AC for ringing. If you place a rectifier in front of the phone (connect the ~ to the line and + and - to the phone), the phone will not ring, but function in every other respect. You can buy "ringing switches" with modular cords from places like Radio Shack. These are nothing more than a rectifier and a switch which lets you bypass the rectifier (ringing on) or activate it (ringing off). If you want to tinker with this yourself, be sure to select a rectifier which won't fry on your first call, remember that ringing is something like 90V AC. Ole "Make it as ubiquitous as dialtone!"