Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!world!jon_sree From: jon_sree@world.std.com (Jon Sreekanth) Newsgroups: sci.electronics Subject: Re: Drawing DC phone current Message-ID: Date: 1 Jun 91 03:48:39 GMT References: <8053@nst> <1084@eplunix.UUCP> <1991May29.084859.5324@specialix.co.uk> <8085@nst> Sender: jon_sree@world.std.com (Jon Sreekanth) Organization: The World Lines: 18 In-Reply-To: grayt@Software.Mitel.COM's message of 29 May 91 18: 52:45 GMT In article <8085@nst> grayt@Software.Mitel.COM (Tom Gray) writes: Telephone line circuit switch hook detectors are designed to operate at currents ABOVE 12mA. They are also designed NOT TO operate at currents LESS than 7mA. No problem will result if you draw less than the 7mA from the loop. Even if the hook detector is not confused by < 7 mA, won't that trigger some automated test equipment that's supposedly looking for leaky (hence faulty) lines ? / Jon Sreekanth Assabet Valley Microsystems Fax and PC products 346 Lincoln St #722, Marlboro, MA 01752 508-562-0722 jon_sree@world.std.com