Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site pttesac.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!zehntel!dual!ptsfa!pttesac!vanam From: vanam@pttesac.UUCP (Marnix van Ammers) Newsgroups: net.dcom Subject: Re: Noisy {{~r lines affecting 212A { modems Message-ID: <152@pttesac.UUCP> Date: Sun, 20-Jan-85 14:23:48 EST Article-I.D.: pttesac.152 Posted: Sun Jan 20 14:23:48 1985 Date-Received: Tue, 22-Jan-85 05:18:28 EST References: <145@pttesac.UUCP> Distribution: net Organization: Pacific Bell ESAC, San Francisco Lines: 23 I've received about 5 mails re: my noisy {{ ~r 212A posting. The consensus is that most of the noise I experience is caused by lack of synchronization of digital carrier facilities. Due to the way the 212A encodes data, the "time slips" in digital carrier facilities usually cause 1 or 2 bit errors. If the error occurs while the facilities are idle (marking) then the noise will usually result in characters with mostly 1's. Now the thing to find out is (and I will try): Do the digital carrier maintenance forces know about unsynchronized systems? Do they get alarms? Are they alerted? Is it easy to fix? If you know the answers, I'd like to hear from you. I'll post whatever I learn. Thanks to everyone who responded. -- Marnix (first name -- pronounced as marnix) van Ammers (last name -- 'v','a','n',' ','A','m','m','e','r','s')