30 Years of the Digest ... founded August 21, 1981
The Telecom Digest for September 07, 2011
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Date: Mon, 05 Sep 2011 22:46:43 -0500 From: firstname.lastname@example.org (Rob Warnock) To: email@example.com. Subject: Re: Mobile phones without towers coming soon Message-ID: <1uWdnbMyUug-CvjTnZ2dnUVZ_umdnZ2d@speakeasy.net> David Clayton <firstname.lastname@example.org> wrote: +--------------- | The Serval system allows mobile phones to communicate with each other to | create a virtual network where no network cover exists. | | In Australia it could allow people travelling in the outback to call each | other for free. | | It could also provide a limited mobile phone network for remote | communities. +--------------- Oh, great. List all of the benefits, but ignore the problems -- the most obvious one being that this is an open invitation to Man-in-the-Middle eavesdropping attacks! Not to mention DoS attacks to block emergency communications during, say, a robbery/home-invasion/kidnapping. -Rob +--------------------------------------------------------------+ Rob Warnock <email@example.com> 627 26th Avenue http://rpw3.org/ San Mateo, CA 94403
Date: Tue, 06 Sep 2011 18:11:20 -0600 From: Fred Atkinson <firstname.lastname@example.org> To: email@example.com. Subject: Re: Mobile phones without towers coming soon Message-ID: <firstname.lastname@example.org> At 09:46 PM 9/5/2011, you wrote: >David Clayton <email@example.com> wrote: >+--------------- >| The Serval system allows mobile phones to communicate with each other to >| create a virtual network where no network cover exists. >| >| In Australia it could allow people travelling in the outback to call each >| other for free. >| >| It could also provide a limited mobile phone network for remote >| communities. >+--------------- > >Oh, great. List all of the benefits, but ignore the problems -- the most >obvious one being that this is an open invitation to Man-in-the-Middle >eavesdropping attacks! Not to mention DoS attacks to block emergency >communications during, say, a robbery/home-invasion/kidnapping. > > >-Rob I hardly think it is much of a worry in the Australian Outback. Fred
Date: Tue, 6 Sep 2011 10:32:54 +0100 From: Peter R Cook <PCook@wisty.plus.com> To: firstname.lastname@example.org. Subject: Re: VOIP Technical Support (or lack thereof) Message-ID: <qpu4pkBGjeZOFwMJ@wisty.plus.com> In message <email@example.com>, firstname.lastname@example.org writes >On Sep 5, 10:17 am, Fred Atkinson <fatkinson.remove-t...@and-this- >too.mishmash.com> wrote: > >> That's the sign of inferior management. The VOIP industry is >> giving itself a very bad reputation. > >IMHO: > >Subscribers are willing to tolerate this lousy service, partly because >they don't have a frame of reference to expect better, and partly >because they like the cheaper price. The gold standard used to be the >service level from the Bell System, but since Divesture, the Baby >Bells' service quality has declined as they cut costs to be >competitive. > >(Ironically, people expected more from the old Bell System since it >was a monopoly and provided end-to-end service. Today, people don't >blame the phone company if their ac power goes out and their phones do >not work as a result.) > >As mentioned, after the hurricane my neighbors were quite surprised >that I had still had phone service while they lost theirs. Further, >people do so much of their talking on cell phones which have inferior >voice and connection quality. To me this all illustrates the lower >service expectations. > >I suspect that if company attempted to provide today a high level of >service quality and first-rate customer support, it's prices would be >so high that it simply couldn't compete in the marketplace. This >isn't just telecommunications, but banking and other services, too. > There is an interesting model of the way this process works - and which fits the landline/cellphone/VOIP behaviour very well - in a paper by David Ahlstrom. The full reference is Ahlstrom, D. (2010). "Innovation and Growth: How Business Contributes to Society." Academy of Management Perspectives 24(3): 11-24. There is a copy on the Internet at http://www.neeley.tcu.edu/uploadedFiles/Academic_Departments/Management/zol003102941p.pdf Look at Figure 4 (P 18, 8th page of the PDF). Landline quality of service probably exceeds the performance "demanded" by the average customer. Cell phone and VOIP - certainly when introduced were below that standard, but had other innovations ( mobility) or price advantages (VOIP) which allowed them to overcome the perceived performance disadvantage. Ahlstrom's models suggests that over time VOIP and Cell quality will exceed that 'demanded' by customers only to be replaced in their turn by ??? -- Peter R Cook
Date: Tue, 06 Sep 2011 19:34:36 -0400 From: Bill Horne <bill@horneQRM.net> To: email@example.com. Subject: Does SMS messaging keep going when cellular voice is down? Message-ID: <firstname.lastname@example.org> I just read an email that claims cell phone text messaging (SMS) keeps going when cellular voice service is down. Please tell me if this is true or not. TIA. Bill -- "Where the veterans dream of the fight Fast asleep at the traffic light" - Jackson Browne
Date: 7 Sep 2011 02:35:19 -0000 From: "John Levine" <email@example.com> To: firstname.lastname@example.org. Subject: Re: Mobile phones without towers coming soon Message-ID: <email@example.com> >A mobile phone communications system that doesn't need towers is being >developed at Adelaide's Flinders University. Mesh networks are one of those ideas that seem much cooler in theory than they turn out to be in practice. Basically, it turns the mobile phone network into Skype, with random traffic flowing through whatever nodes seem to be in generally the right direction. Everyone's phone is a tower, so the rate at which your battery runs down depends on how chatty strangers on opposite sides of you are. R's, John
Date: Tue, 06 Sep 2011 23:24:53 -0400 From: Telecom Digest Moderator <firstname.lastname@example.org> To: email@example.com. Subject: Non-standard character sets in posts sent to the Digest Message-ID: <E2QunPp-0007kD-S5@telecom.csail.mit.edu> http://effaustin.org/2011/08/statement-on-san-francisco-bart-cellphone-service-shutdown/ BART?s action probably violated section 333 of the Communications Act. The mobile providers? decision to give control over the mobile service repeaters/microcells to BART also probably violated the terms of their licenses and FCC rules, 47 C.F.R. sections 22.383 and 22.527, and possibly others. The FCC noted only a few months ago that ?the Commission?s rules and policies adopted pursuant to section 310(d) require that licensees maintain control over and responsibility for their assigned spectrum, equipment, and operations. Similarly, section 1.903 established that stations in wireless services may only be operated with an FCC authorization (i.e., license).? Violations are punishable by fines and forfeitures. Although the FCC is considering changing these rules?in an effort to encourage further use of repeaters and signal boosters by users?the rule changes have not yet gone into effect. --- StripMime Report -- processed MIME parts --- multipart/mixed text/plain (text body -- kept) +--------------------------------------------------------------+ ***** Moderator's Note ***** To the original poster: thank you for your contribution to the Digest. I appreciate your work, and apologize for the need to use a part of your post as an example of a general issue. To the readership, for future reference: the material shown above was part of a post that had a character set the Telecom Digest doesn't use, and contained glyphs which do not display on my screen: although it's "more or less" readable that way, I hope the readers will agree that using non-standard character sets may cause confusion. For those whom are curious, the character set was UTF-8, but I often receive posts written with "windows" or other non-standard glyphs as well. So, here's my request: please use the US-ASCII or ISO-8859-1 charset when sending posts to the Digest, and please use "Plain Text" content instead of MIME. If you don't, I'm left with a choice of whether to send your post out with glyphs that might or might not be readable. To help prevent this problem, please don't copy-and-paste material from web sites or emails directly into posts you are preparing for The Telecom Digest: they might not appear as you intend. If I have to guess at what "rules?" means when I'm moderating a post, then there's a chance that I'll guess wrongly, and your contribution will look less serious than you deserve. It's a good idea to paste any copied material into a "text only" text editor, and save the result, so as to lessen the chance of non-standard characters being included with your post. Doing so will also give you a good idea of what the Digest's Moderator will see when he looks at your post, and will draw attention to the areas which, althought they may have looked good with bold or underlining or other emphasis in another window, will appear "flat" when viewed as plain text. Bill Horne Moderator
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