Received: by bu-cs.BU.EDU (5.58/4.7) id AA11327; Mon, 2 Jan 89 20:58:38 EST Message-Id: <8901030158.AA11327@bu-cs.BU.EDU> Date: Mon, 2 Jan 89 20:30:54 EST From: The Moderator Reply-To: TELECOM@bu-cs.BU.EDU Subject: TELECOM Digest V9 #1 To: TELECOM@bu-cs.bu.edu Status: O TELECOM Digest Mon, 2 Jan 89 20:30:54 EST Volume 9 : Issue 1 Today's Topics: Excuses instead of info "Hands On" Seminars, 1989 Re: DTMF vs. Touch-Tone Trade Journals of Interest [Welcome to the new year, and to a new volume of this journal. I hope 1989 will be a year of accomplishment and posterity for you. P. Townson] ---------------------------------------------------------------------- To: comp-dcom-telecom@ucsd.edu From: hp-sdd!rog@hpcilzb.HP.COM (Roger Haaheim) Subject: Excuses instead of info Date: 29 Dec 88 13:17:43 GMT Back in the good old days...one could dial a special number, hang up, and the dialing phone would ring; some kind of echo. It was used by phonefolks who came to fix the phone, to check to see if it was working. They had no problem telling the customer what that number was so the customer could dial back to him/herself. Why has that capability become proprietary? I know it's still done, but when I ask...excuses, but no number. How come? ------------------------------ Date: Mon, 2 Jan 89 04:20:23 EST From: telecom@bu-cs.BU.EDU (TELECOM Moderator) To: telecom@bu-cs,bu.edu Subject: "Hands On" Seminars, 1989 The American Institute, of Madison, NJ has announced the calendar of seminars and training sessions for telecommunications related subjects for 1989. While their programs seem to generally be good and very informative/educational, they are not inexpensive. Typically the rates for the three day seminars range from $900-$1300, not including your hotel room, etc. The DataComm Group is a division of American Institute, and for many years it has had an excellent reputation for its educational programs on technical subjects. Of the four people I've known who attended these seminars in the past, three praised them, while one was only mildly enthusiastic. You can get more information, and/or register by calling or writing the American Institute, DataComm Group -- American Institute DataComm Group 55 Main Street Madison, NJ 07940 201-377-7400 Seminar schedule - Hands-On Data Communications 13 hands-on experiment sessions dealing with ============================ the data network; modems; voice/data integration local area networks; and transmission media. Detroit, MI February 15-17, 1989 New Brunswick, NJ February 22-24, 1989 Seattle, WA March 1-3, 1989 Washington, DC March 6-8, 1989 San Jose, CA March 13-15, 1989 Chicago, IL March 20-22, 1989 New York, NY April 3-5, 1989 Morristown, NJ April 10-12, 1989 Hands-On Local Area Networks Learn latest LAN technologies including Ethernet ============================ and Token-Ring. New York, NY January 10-13, 1989 and March 21-24, 1989 Washington, DC February 21-24, 1989 and May 2-5, 1989 Chicago, IL January 24-27, 1989 and April 4-7, 1989 Los Angeles, CA March 7-10, 1989 and May 9-12, 1989 San Jose, CA February 7-10, 1989 and April 25-28, 1989 Hands-On Troubleshooting LAN Learn LAN network management; LAN problem ============================ detirmination; troubleshooting tools and techniques. Los Angeles, CA January 18-20, 1989 and March 29-31, 1989 New York, NY February 1-3, 1989 and April 26-28, 1989 Chicago, IL February 15-17, 1989 and April 19-21, 1989 Washington, DC March 1-3, 1989 and May 8-10, 1989 San Jose, CA March 15-17, 1989 and May 15-17, 1989 Hands-On X.25 OSI Packet Switching Gain an in-depth understanding of ISDN, ================================== MAP/TOP networks, OSI, GOSIP networks. to use Data Analyzers. Actual experiments with an in-place X.25 PAD. San Jose, CA March 1-3, 1989 (only one session here) Los Angeles, CA February 15-17, 1989 and May 15-17, 1989 Chicago, IL February 22-24, 1989 and May 8-10, 1989 Washington, DC March 20-22, 1989 (only one session here) New York, NY Apeil 10-12, 1989 (only one session here) The DataComm Group courses listed above carry either 4 or 5 CEU's, and count toward advanced level certification. For more information on all courses and to register, call 201-377-7400. Patrick Townson ------------------------------ To: telecom@bu-cs.bu.edu From: westmark!dave@rutgers.edu (Dave Levenson) Subject: Re: DTMF vs. Touch-Tone Date: 30 Dec 88 16:22:44 GMT In article , imp@crayview.msi.umn.edu (Chuck Lukaszewski) writes: > Actually, DTMF has always been generated by premises telephones. The in-band > signalling to which you refer was done with single MF tones which were on > 200-Khz frequency multiples.... Actually, the inter-office signaling uses tone-pairs. Each digit (and a couple of "control characters") is represented as two of five tones. The individual frequencies are spaced at 200 Hz (not kHz) intervals. -- Dave Levenson Westmark, Inc. The Man in the Mooney Warren, NJ USA {rutgers | att}!westmark!dave ------------------------------ Date: Mon, 2 Jan 89 04:53:07 EST From: telecom@bu-cs.BU.EDU (TELECOM Moderator) To: telecom@bu-cs.bu.edu Subject: Trade Journals of Interest Four publications I've found to be useful for telecommunications people are listed below. You may already subscribe to one or more of them. TELECONNECT - A Monthly Telecommunications Magazine This general news and features magazine is published monthly by Telecom Library, Inc. A one year subscription (12 issues) is $15. Harry Newton is the editor, and his writing is quite good. Telecom Library, Inc. is located at 12 West 21st Street, New York, NY 10010. They prefer to receive mail and editorial submissions on their free email system at 212-989-4675. (300/1200). TPT Networking Management This rather technical publication devoted its December, 1988 issues to articles on 'Baby Bells look for a new image', 'Overview of X.25 Systems', 'Timing is Everything in Network Strategy', and 'Will FTS-2000 arrive by the millennium?'. In this last article, columnist John Gantz talks about the US Government's 'fumbling and bumbling in the telephone business'. Published monthly, subscriptions are free to qualified recipients. It is published by Penn-Well Publishing Company, 1421 South Sheridan, Tulsa, OK 74112. Editorial and production offices are in Westford, MA at 508-692-0700. Telecom Gear This is a sort of 'shopper newspaper' specializing in sometimes hard to find telecom equipment and supplies. It is free, and published monthly, typically with 150-200 pages of advertising from all sorts of mail order houses which specialize in telecom stuff. If you subscribe to TELECONNET (see above) then you automatically get TELECOM GEAR it seems. The best way to describe this publication is to compare it to 'Computer Shopper'. It has many of the same kinds of ads for buying/selling used equipment, etc. Their address is Telecom Gear, 1265 Industrial Highway, Southampton, PA 18966. U.S. Telecom Digest No, this is NOT the 'print edition' of what you are reading now. It is a rather expensive (at $109 for 23 issues per year, bi-weekly) newsletter which seems to have good, thorough and accurate reports on a wide variety of telecom-related issues. They provide very extensive coverage of telecom legal matters; they report in great detail on pending legislation and FCC activities relating to telecommunications. Their address is -- U.S. Telecom Digest, 1101 King St. Suite 444, Alexandria, VA 22314. I read other telecom-related publications, but I would say the above four are 'must-reads' for me. The others I get to as time permits each month. Patrick Townson ------------------------------ End of TELECOM Digest *********************