From editor@telecom-digest.org Fri Jul 23 21:18:34 2004 Received: (from ptownson@localhost) by massis.lcs.mit.edu (8.11.6p3/8.11.3) id i6O1IYa10652; Fri, 23 Jul 2004 21:18:34 -0400 (EDT) Date: Fri, 23 Jul 2004 21:18:34 -0400 (EDT) From: editor@telecom-digest.org Message-Id: <200407240118.i6O1IYa10652@massis.lcs.mit.edu> X-Authentication-Warning: massis.lcs.mit.edu: ptownson set sender to editor@telecom-digest.org using -f To: ptownson Approved: patsnewlist Subject: TELECOM Digest V23 #347 TELECOM Digest Fri, 23 Jul 2004 21:18:00 EDT Volume 23 : Issue 347 Inside This Issue: Editor: Patrick A. Townson TiVo Takes On Hollywood - Again / The DVR Service Risks (Monty Solomon) AirPort Express Review (Monty Solomon) TiVo's Plans Lead to Fight On Copyrights (Monty Solomon) RCN Announces Mass Deployment of Digital Video Recorder (Monty Solomon) EPIC Alert 11.14 (Monty Solomon) EFFector 17.26: Action Alert - Induce Act Hearing Rescheduled (Solomon) Apple's Pocket-Size Base Station (Monty Solomon) Laptops at the FleetCenter at Risk of Breaches, Attack (Monty Solomon) Re: Truth or Fiction? Osama Found Hanged (Bart Fisher) Re: Truth or Fiction? Osama Found Hanged (Ray) Re: Truth or Fiction? Osama Found Hanged (Paul Vader) Re: Truth or Fiction? Osama Found Hanged (Linc Madison) Re: Verizon as Local Telephone Provider?? (jjk2c) Re: Verizon as Local Telephone Provider?? (Carl Navarro) Re: Verizon as Local Telephone Provider?? (Justin Time) Re: Phone for Noisy Environment (Clark W. Griswold, Jr.) Re: Conference Bridge, Conference Over SONET (Julian Macassey) All contents here are copyrighted by Patrick Townson and the individual writers/correspondents. Articles may be used in other journals or newsgroups, provided the writer's name and the Digest are included in the fair use quote. By using -any name or email address- included herein for -any- reason other than responding to an article herein, you agree to pay a hundred dollars to the recipients of the email. =========================== Addresses herein are not to be added to any mailing list, nor to be sold or given away without explicit written consent. Chain letters, viruses, porn, spam, and miscellaneous junk are definitely unwelcome. We must fight spam for the same reason we fight crime: not because we are naive enough to believe that we will ever stamp it out, but because we do not want the kind of world that results when no one stands against crime. Geoffrey Welsh =========================== See the bottom of this issue for subscription and archive details and the name of our lawyer; other stuff of interest. ---------------------------------------------------------------------- Date: Thu, 22 Jul 2004 22:17:58 -0400 From: Monty Solomon Subject: TiVo Takes On Hollywood - Again / The DVR service risks The DVR service risks alienating the industry it needs most. By Phillip Swann Washington, D.C. (July 22) -- Four years ago, TiVo was a four-letter word in Hollywood -- in more ways than one. The Digital Video Recorder service, which enables users to fast-forward past commercials, petrified entertainment officials who envisioned that the device would wipe out their advertising divisions. Their concerns were hardly softened when TiVo ran a TV commercial showing a DVR representative throwing a network executive out of the window of an office building. TiVo's message was clear: Network execs, your days are numbered. However, TiVo's executive team soon realized that their decision to market 'ad-skipping' was suicidal. Without the support of Hollywood -- and the advertising dollars of the networks and the studios -- the DVR service would be solely dependent on subscription revenue. And with subs climbing slowly, the strategy would eventually put TiVo out of business. So, TiVo set out to mend fences in Tinseltown, playing down the ad-skipping feature and making promises that it would help entertainment companies deliver advertising messages in exciting new ways, such as video pop-up ads and e-mail downloads. The new approach started to pay off a few years ago when entertainment companies started to advertise with TiVo's service. Primetime network shows such as Will & Grace began name-dropping TiVo in episodes. Suddenly, the DVR service was a new star in Hollywood. But now it appears that TiVo has wiped out four years of hard work with one action. TiVo wants to permit subscribers to transfer recorded shows to other devices, including laptops and PCs, so they could watch them anywhere. The "video to go" concept has prompted Hollywood studios and the National Football League to say the new service could violate their copyrights by sending the programs in a digital form, which are more easily copied and possibly distributed over the Internet. The studios and the NFL have filed protests with the Federal Communications Commission. http://tvpredictions.com/tivohollywood072204.html ------------------------------ Date: Thu, 22 Jul 2004 22:29:38 -0400 From: Monty Solomon Subject: AirPort Express Review by Eric Bangeman Introduction What do your home stereo, wireless network, and USB printer have to do with one another? Everything, according to Apple and its new AirPort Express. Before Apple was all about music, it was all about wireless. Back in late 1999, Apple released its original AirPort Base Station based on the 802.11b specification. It was one of the first consumer wireless access points to ship, and Apple marketed the base station and AirPort cards as the perfect way to free yourself from the tyranny of Ethernet cables and hubs. The original AirPort was followed by the unfortunately-named AirPort Extreme, which updated the Apple logo on the front of the base station from white to metallic, the status LEDs from green to white, and the innards from 802.11b to 802.11g and its maximum 54Mbps throughput. At the same time, Apple was working the music angle. iTunes went from version 1.0 to a full-featured music player that allowed you to purchase music online and share it with other computers on the network. However, there was a gap between the computer and the home stereo. There was no easy way to play the music you purchased from the iTunes Music Store on your home stereo. Third-party products existed to stream music from a PC to a stereo, but many of them cannot handle AAC, and none of them are capable of streaming Apple's FairPlay DRMed AACs. The AirPort Express is the product from Apple that is meant to tie the two together. It is a fully-capable, mobile 802.11g wireless access point that can also stream music from iTunes to your home stereo. In addition, it can extend the range of an AirPort Base Station and support print jobs over the network to a USB printer. http://arstechnica.com/reviews/004/airportexpress/airportexpress-1.html ------------------------------ Date: Thu, 22 Jul 2004 23:13:17 -0400 From: Monty Solomon Subject: TiVo's Plans Lead to Fight On Copyrights Technology Would Allow Transfer of Programs By Jonathan Krim Washington Post Staff Writer Hollywood studios and the National Football League are seeking to block the maker of the popular TiVo television recorder from expanding its service so that users could watch copies of shows and movies on devices outside their homes. In filings with the Federal Communications Commission, the organizations say the new technology could compromise the copyrights of shows that broadcasters send over the airwaves in digital form, which offers much higher sound and video quality than what viewers typically get today. The organizations fear that computer enthusiasts would capture those programs and begin trading them online in the same way that millions of music files are shared daily, which record companies have said has cut into their profit. TiVo Inc. insists its system will not allow such mass Internet distribution. The battle is one of several being waged in federal agencies and on Capitol Hill this summer, as content companies such as the movie and music companies seek to keep control of copyrighted works that increasingly can be digitally stored, copied, manipulated and distributed by users. In turn, several public advocacy groups and technology companies warn that the content companies are trying to revoke long-standing consumer rights to "fair use" of artistic works. http://www.washingtonpost.com/ac2/wp-dyn/A4042-2004Jul21 ------------------------------ Date: Thu, 22 Jul 2004 23:21:50 -0400 From: Monty Solomon Subject: RCN Announces Mass Deployment of Digital Video Recorder Service Fully Integrated Service Delivers Convenience for Customers, Including HDTV Capability PRINCETON, N.J., July 20 /PRNewswire-FirstCall/ -- RCN Corporation today announced the launch of its Digital Video Recorder (DVR) service. DVRs will allow RCN customers to digitally record their favorite TV programs and watch them on their own schedule. Programming content is recorded to a hard drive within the digital set-top box, which can store up to 50 hours of standard definition content. DVRs are currently available in Boston and New York, and are expected to be available in all RCN markets by October 1, 2004. RCN's DVR set-top box has advanced capability to deliver HDTV content when connected to a High Definition television and can record between 7 to 10 hours of HDTV programming on the box's hard drive. Premium bundled customers can add DVR service to their bundles for less than $11.95 per month, including HD availability. In addition to recording and replay, RCN's DVRs also allow customers to pause and rewind live programming, an especially valuable feature for sports fans wishing to get a second look at key plays during sporting events. The interactive programming guide will enable RCN customers to control the DVR's functionality, enabling them to record an entire season of their favorite show. http://finance.lycos.com/qc/news/story.aspx?story=200407201813_PRN__PHTU036 ------------------------------ Date: Thu, 22 Jul 2004 23:50:17 -0400 From: Monty Solomon Subject: EPIC Alert 11.14 ======================================================================= E P I C A l e r t ======================================================================= Volume 11.14 July 22, 2004 ----------------------------------------------------------------------- Published by the Electronic Privacy Information Center (EPIC) Washington, D.C. http://www.epic.org/alert/EPIC_Alert_11.14.html ====================================================================== Table of Contents ====================================================================== [1] Ridge Declares CAPPS II Dead; Questions Remain [2] 9/11 Commission Releases Final Report [3] EPIC Testifies in Favor of RFID Privacy [4] Appeals Court Urged to Reverse Ruling on PATRIOT Records [5] EPIC Files Suit for Defense Data Mining Records [6] News in Brief [7] EPIC Bookstore: Privacy in the 21st Century [8] Upcoming Conferences and Events http://www.epic.org/alert/EPIC_Alert_11.14.html ------------------------------ Date: Thu, 22 Jul 2004 23:51:26 -0400 From: Monty Solomon Subject: EFFector 17.26: Action Alert - Induce Act Hearing Rescheduled EFFector Vol. 17, No. 26 July 15, 2004 donna@eff.org A Publication of the Electronic Frontier Foundation ISSN 1062-9424 In the 298th Issue of EFFector: * Action Alert: Induce Act Hearing Rescheduled - Keep Up the Pressure! * CAPPS II Cancelled: Department of Homeland Security Puts Stake in the Heart of Passenger-Profiling System * Citizens Unite for "Computer Ate My Vote" E-Voting Rallies * The DoJ Report on PATRIOT: Style, Not Substance * Audible (Not So) Magic * Join EFF for Freedom Fest 2004 on August 4th - LinuxWorld Attendees Invited! * MiniLinks (19): Breaking Down Councilman * Staff Calendar: 07.23.04 - Wendy Seltzer speaks at BlogOn, Berkeley, CA; 07.26.04 - 07.28.04 - Wendy Seltzer speaks at PFIR's "Preventing the Internet Meltdown"; 07.30.04 - 08.01.04 - Kevin Bankston, Annalee Newitz, Seth Schoen, and Wendy Seltzer speak at Defcon 12, Las Vegas, NV; 08.04.04 - EFF Holds Freedom Fest 2004, San Francisco, CA * Administrivia http://www.eff.org/effector/17/26.php ------------------------------ Date: Fri, 23 Jul 2004 00:43:53 -0400 From: Monty Solomon Subject: Apple's Pocket-Size Base Station STATE OF THE ART By DAVID POGUE IN his weekly "60 Minutes" commentary a couple of years ago, the inimitable Andy Rooney groused about the number of cables in our lives. "Look behind the television set in your living room. It's a rat's nest of electrical cords," he said. "All different -- no two the same. If Thomas Edison was so smart, how come he didn't come up with one cord that fits everything?" Of course, it wouldn't be very hard for Mr. Rooney to answer his own question. To find out why cords are designed to fit only specific connectors, all he'd have to do is plug his headphones into an electrical outlet, just once. A slightly less painful approach might be for Mr. Rooney to look into Apple, a company with an official corporate disgust for cables. Apple was the first computer company to offer built-in Wi-Fi wireless antennas (also known as 802.11 -- or, as Apple more charmingly calls it, AirPort). Apple was also the first company to offer built-in Bluetooth, a short-range wireless technology designed to eliminate the cords between computers, printers and other gadgets. And when a cable can't be eliminated, Apple goes to ridiculous extremes to at least make it good-looking and color-coordinated. Last week, Apple introduced yet another way to eliminate wires from your life. It introduced the AirPort Express, a $130 something-or-other for both Windows PC's and Macs. There's no single pithy term or phrase for this invention; it has more tricks up its sleeve than David Blaine. http://www.nytimes.com/2004/07/22/technology/circuits/22state.html ------------------------------ Date: Fri, 23 Jul 2004 17:02:09 -0400 From: Monty Solomon Subject: Laptops at the FleetCenter at Risk of Breaches, Attack By Hiawatha Bray, Globe Staff | July 22, 2004 The Democratic National Convention will attract thousands of visitors armed with laptop computers that feature wireless Internet access. And that could be a formula for disaster, according to a Boston data security firm that recently ran a vulnerability test in the area around the FleetCenter. Michael Maggio, the president of Newbury Networks Inc., said that unless proper precautions are taken, computer vandals will be able to tap into these laptops by using wireless transmitters located outside of the FleetCenter. The attackers could then use the compromised laptops to gain access to the computer network used to run the convention. The vandals could obtain sensitive information related to the campaign of presidential candidate John Kerry. Or they could unleash an attack that would bring down the network and throw the convention into chaos. http://www.boston.com/business/technology/articles/2004/07/22/laptops_at_the_fleetcenter_at_risk_of_breaches_attack/ ------------------------------ From: Bart Fisher Subject: Re: Truth or Fiction? Osama Found Hanged Date: Fri, 23 Jul 2004 11:03:41 -0700 Organization: Posted via Supernews, http://www.supernews.com Yep, This is a Trojan Virus - avoid the temptation to download and view. Bart On Thu, 22 Jul 2004 14:24:38 GMT, PeterReid@columbia.edu wrote: > Osama Bin Ladin was found hanged by two CNN journalists early > Wednesday evening. As evidence they took several photos, some of > which I have included here. As yet, this information has not hit the > headlines due to Bush wanting confirmation of his identity but the > journalists have released some early photos over the internet. > http://www.theparadise.x-y.net/OsamaFoundDead.zip > [TELECOM Digest Editor's Note: Why does this remind me of all the > stories about Adolph Hitler committing suicide in 1945 as USA > troops closed in on him and then a couple years later, around 1947 > or so the rumors about Hitler escaping and being seen in Brazil > and other South American countries. Of course no one has ever been > able to prove it true, nor have any if the people who saw him in > Brazil ever been identified either. I wonder if this Osama Bin Laden > story -- which came to me several times today, reminiscent of spam -- > will now be spread forever. Anyone want to see if that 'OsamaFound > Dead.zip' link is in fact some virus in waiting? PAT] ------------------------------ From: rayj00@yahoo.com (Ray) Subject: Re: Truth or Fiction? Osama Found Hanged Date: 23 Jul 2004 16:46:49 -0700 Organization: http://groups.google.com It does contain a virus ... beware ... David B. Horvath, CCP wrote in message news:... > On Thu, 22 Jul 2004 14:24:38 GMT, PeterReid@columbia.edu posted: >> http://www.theparadise.x-y.net/OsamaFoundDead.zip >> [TELECOM Digest Editor's Note: Why does this remind me of all the >> stories about Adolph Hitler committing suicide in 1945 as USA >> troops closed in on him and then a couple years later, around 1947 >> or so the rumors about Hitler escaping and being seen in Brazil >> and other South American countries. Of course no one has ever been >> able to prove it true, nor have any if the people who saw him in >> Brazil ever been identified either. I wonder if this Osama Bin Laden >> story -- which came to me several times today, reminiscent of spam -- >> will now be spread forever. Anyone want to see if that 'OsamaFound >> Dead.zip' link is in fact some virus in waiting? PAT] > The .zip contains a .exe (no .jpg, or .gif or .bmp or ...). I got rid > of the .zip without running the .exe. Unless proven otherwise. I assume > that this is a virus. > Please don't publish my email address (too much spam); name is fine. > - David ------------------------------ From: pv+usenet@pobox.com (Paul Vader) Subject: Re: Truth or Fiction? Osama Found Hanged Date: Thu, 22 Jul 2004 22:16:59 -0000 Organization: Inline Software Creations > [TELECOM Digest Editor's Note: Why does this remind me of all the > Brazil ever been identified either. I wonder if this Osama Bin Laden > story -- which came to me several times today, reminiscent of spam -- > will now be spread forever. Anyone want to see if that 'OsamaFound > Dead.zip' link is in fact some virus in waiting? PAT] It's someone seeding a virus. It's not even the first time this hook has been tried -- I remember "Osama captured" virus emails from several months ago. * * PV something like badgers--something like lizards--and something like corkscrews. [TELECOM Digest Editor's Note: Okay, so the message announcing same is the makings of a virus; nothing new there, along with the dozen or so more copies of it I got today. But was Osama found hanged or not, or is that something we are never to know. I know regards Hitler there are still people questioning that one now sixty years later also. PAT] ------------------------------ Subject: Re: Truth or Fiction? Osama Found Hanged Date: Thu, 22 Jul 2004 14:14:55 -0700 From: Linc Madison Reply-To: lincmad@suespammers.org Organization: California resident; nospam; no unsolicited e-mail allowed In article , wrote: > Osama Bin Ladin was found hanged by two CNN journalists early > Wedensday evening. As evidence they took several photos, some of > which I have included here. As yet, this information has not hit the > headlines due to Bush wanting confirmation of his identity but the > journalists have released some early photos over the internet. > http://www.theparadise . x-y . net/O s a m aFoundDead.zip I haven't checked the file myself, but a report in uk.telecom indicates that the file contains the "HackArmy" (a.k.a. "HacArmy") virus. I have not been able to corroborate that report on any of the major anti-virus web sites, but I would certainly treat the file with EXTREME caution. In particular, if you choose to download it at all, please be sure to get the very latest version of virus definitions for your anti-virus software first! Incidentally, the host on which the file is offered above is located in Korea. That in itself doesn't necessarily mean that it's malware, but it is certainly additional reason for circumspection. Linc Madison * San Francisco, California * lincmad@suespammers.org * primary e-mail: Telecom at LincMad dot com All U.S. and California anti-spam laws apply, incl. CA BPC 17538.45(c) This text constitutes actual notice as required in BPC 17538.45(f)(3). DO NOT SEND UNSOLICITED E-MAIL TO THIS ADDRESS. You have been warned. [TELECOM Digest Editor's Note: I wonder, Linc ... If I were to start a message going around on the net saying that Mr. Hitler was in fact alive in Brazil, had been seen going door to door selling encyclopedia books, and that CNN had tapes of it but was sitting on it waiting for Dubya to give imprimateur to releasing the story to the unwashed masses before they reported it, how many viruses do you suppose I could foist off? I wouldn't dare sign my name to it; everyone knows I am a cracked pot. Could I use your name for the message, Linc? PAT] ------------------------------ From: jjk2c@netzero.com (jjk2c) Subject: Re: Verizon as Local Telephone Provider?? Date: 22 Jul 2004 15:28:51 -0700 Organization: http://groups.google.com Town is Carbondale Illinois. I know Verizon is the local provider. I called SBC and AT&T both today and spoke with someone. Neither one is available there. It looks like I am probably stuck with Verizon and an unfair plan of either $15.00 for local phone service and it will cost me for each call or $42.00 for a bunch of stuff I don't need! jjk2c@netzero.com (jjk2c) wrote in message news:: > I will be moving to southern Illinois soon. It is my understanding > that my new local phone provider is Verizon. Does anyone know if the > phone service have been deregulated there yet? > I really don't want to go with Verizon unless I have to. The reason > being is that from their website it appears I have two options: > 1) For like $15.00 a month, I can get phone service, but every local > call is like a half cent a minute. That sounds crazy to me. > 2) The next step up is like $42.00 a month, but that comes with all > the bells and whistles like call forwarding and call waiting deluxe > and all sorts of other stuff I don't need nor do I want. > I have looked at SBC and AT&Ts websites and they all have plans with > basic unlimited local calling for like $25.00 a month which I think is > pretty reasonable. When I try to sign up with either of these two > companies by their websites, I get that phone service is available. > However, neither one is able to verify my address on their website so > that I can set up service. > So that leads me back to my original question. Does anyone know if I > am going to be stuck with Verizon, or do I have any other options? I > have Verizon for my cell phone, and I think they are pretty good for a > cell phone, but I think their local service is just a little bit > ridiculous. > Thanks for any information anyone may have. > [TELECOM Digest Editor's Note: In large parts of Illinois, the telco > of record is SBC (formerly Ameritech, prior to that Illinois Bell). > Far south Illinois is a bit more sketchy, with a variety of rural > telephone companies, etc. Would you mind saying *which* town in > southern Illinois you are going to be locating to and perhaps someone > can tell you who the telco of record is there. You also mentioned > SBC and AT&T as possible choices. Have you tried using those two > companies contact numbers (as shown on the web sites) and had one > of the humans (at either company) verify the address, service plans, > etc? PAT] ------------------------------ From: Carl Navarro Subject: Re: Verizon as Local Telephone Provider?? Reply-To: cnavarro@wcnet.org Date: Thu, 22 Jul 2004 07:22:08 GMT Organization: Road Runner High Speed Online http://www.rr.com On 21 Jul 2004 17:12:52 -0700, jjk2c@netzero.com (jjk2c) wrote: > I will be moving to southern Illinois soon. It is my understanding > that my new local phone provider is Verizon. Does anyone know if the > phone service have been deregulated there yet? > I really don't want to go with Verizon unless I have to. The reason > being is that from their website it appears I have two options: > 1) For like $15.00 a month, I can get phone service, but every local > call is like a half cent a minute. That sounds crazy to me. > 2) The next step up is like $42.00 a month, but that comes with all > the bells and whistles like call forwarding and call waiting deluxe > and all sorts of other stuff I don't need nor do I want. I wouldn't wish option 1 on my worst enemy! USS (usage sensitive service) can be a real surprise when you get the bill every month. Our Verizon North residential bills don't come anywhere near that in Ohio. You might find that there's actually a plan that happens to be $16.95 less than the $42. My base residential service is about $23 which includes the $6.50 interstate access charge. Of course, Distinctive Ring, CF, 3 Way calling and Name and number CID pushes that rate up to $36, but that's still less than $42 and Distinctive ring is relatively expensive. If you do a Google search for GTE Illinois local rate plan, you will find some other Competive Local Exchange Carriers to call and see if they have a rate plan for your town. Prepare to be overwhelmed with rate filings and the like. Carl Navarro ------------------------------ From: a_user2000@yahoo.com (Justin Time) Subject: Re: Verizon as Local Telephone Provider?? Date: 22 Jul 2004 12:30:58 -0700 Organization: http://groups.google.com jjk2c@netzero.com (jjk2c) wrote in message news:: > I will be moving to southern Illinois soon. It is my understanding > that my new local phone provider is Verizon. Does anyone know if the > phone service have been deregulated there yet? > I really don't want to go with Verizon unless I have to. The reason > being is that from their website it appears I have two options: > 1) For like $15.00 a month, I can get phone service, but every local > call is like a half cent a minute. That sounds crazy to me. > 2) The next step up is like $42.00 a month, but that comes with all > the bells and whistles like call forwarding and call waiting deluxe > and all sorts of other stuff I don't need nor do I want. > I have looked at SBC and AT&Ts websites and they all have plans with > basic unlimited local calling for like $25.00 a month which I think is > pretty reasonable. When I try to sign up with either of these two > companies by their websites, I get that phone service is available. > However, neither one is able to verify my address on their website so > that I can set up service. > So that leads me back to my original question. Does anyone know if I > am going to be stuck with Verizon, or do I have any other options? I > have Verizon for my cell phone, and I think they are pretty good for a > cell phone, but I think their local service is just a little bit > ridiculous. > Thanks for any information anyone may have. Sheesh!! Call them. Local phone service is like buying a car. You pay for all the options. If you don't want all the bells and whistles, just tell them and the bill goes down accordingly. Rodgers Platt ------------------------------ From: Clark W. Griswold, Jr. <73115.1041@compuserve.com> Subject: Re: Phone for Noisy Environment Date: Thu, 22 Jul 2004 17:22:44 -0600 Organization: Posted via Supernews, http://www.supernews.com J Kelly wrote: > Can anyone recommend a GOOD quality phone for use in a noisy > environment? Most phones sold today are total pieces of crap. > Requirements are a volume control for the earpiece, be able to > withstand a reasonable amount of abuse (dropping the handset, etc, not > purposely abusing it), works with a POTS line, and hopefully costs > less than $50. Don't need speaker phone, memory dialing, etc, but > some of that might be nice, as would be noise cancelling. This is > used in an area that has a lot of very large fans and motors running > making a lot of noise. Even the 'office area' in this facility has a > lot of noise and I'm half deaf besides. Back in the days of TPC ("The Phone Company"), you could get something called a "Confidencer" that was a replacement screw on transmitter for standard handsets. It worked very well by reducing the sidetone (ie noise) from the area you were in. Standard phones and TPC have gone the way of the Dodo bird, so I have no idea where you would go now. ------------------------------ From: Julian Macassey Subject: Re: Conference Bridge, Conference Over SONET Organization: People of bad intent Date: Fri, 23 Jul 2004 00:15:54 -0500 On 21 Jul 2004 05:14:11 -0700, hitesh wrote: > Can anyone tell me how a conference bridge works? Simply they are large banks of hybrids. But modern ones are all digital. > I want to establish a conference call using orderwire > byte of the SONET frame, any idea?? How to do it? Also any devices > for such application? There are T1/E1 bridges out there. Check Google. > a) how is the echo cancellation done? DSP. > b) how overflow is avoided during the addition? Dunno if it is a problem. > c) are there any small bridges available? and their details? Most PBX manufacturers sell an adjunct bridge. Besides bridges sold as stand alone units. "The right to be let alone is indeed the beginning of all freedom." - Justice William O. Douglas ------------------------------ TELECOM Digest is an electronic journal devoted mostly but not exclusively to telecommunications topics. It is circulated anywhere there is email, in addition to various telecom forums on a variety of networks such as Compuserve and America On Line, Yahoo Groups, and other forums. It is also gatewayed to Usenet where it appears as the moderated newsgroup 'comp.dcom.telecom'. TELECOM Digest is a not-for-profit, mostly non-commercial educational service offered to the Internet by Patrick Townson. All the contents of the Digest are compilation-copyrighted. You may reprint articles in some other media on an occasional basis, but please attribute my work and that of the original author. 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