30 Years of the Digest ... founded August 21, 1981
The Telecom Digest for September 21, 2011
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Date: Tue, 20 Sep 2011 00:50:36 -0400 From: tlvp <mPiOsUcB.EtLlLvEp@att.net> To: email@example.com. Subject: Re: EXchanges (was: area code named beer) Message-ID: <firstname.lastname@example.org> On Sat, 17 Sep 2011 20:28:10 -0400, after tlvp wrote > ... > Hook-flash dialing was quite a trick to master, if you hadn't > quite ever needed to before. ... > Moderator added: > My dad taught me a different method. When he came across a phone that > had a dial-lock on it, he would hook-flash the operator (the trick, > btw, is to flash the hook at a consistent rate - most people try for > speed, which is the wrong way to go about it) and ask for assistance > in dialing, and he'd say the line kept going dead. ... 1) Hook-flashing a Yale Operator on a YPI phone wouldn't go very well, as the Yale operator would simply respond as if we were YPI inmates having somehow gotten unauthorized after-hours access to the phone. Campus Police perhaps likewise, but they'd come to make sure we were properly confined again, and then learn we weren't inmates at all :-) . 2) A consistent rate is important, of course, but the speed is, too: slower than about 5 pulses per second and your click-stream becomes not a pulse-dial 9, for example, but rather nine pulse-dial 1s. The trick to getting a consistent and fast stream of clicks, I found, was (i) to alternate fingers on both hands, (ii) to hook-flash in perceptible, systematic patterns, e.g., three quick triplets for a 9, Click-click-click Click-click-click Click-click-click, with other suitable patterns for other digits, and (iii) to aim for something like 6 flashes per second (360 as a metronome setting) or more. HTH :-) . 3) Q.: Will hook-flash dialing still work on today's DTMF-based PBXes? Cheers, -- tlvp -- Avant de repondre, jeter la poubelle, SVP.
Date: Mon, 19 Sep 2011 23:14:56 -0500 From: Neal McLain <email@example.com> To: firstname.lastname@example.org. Subject: Re: EXchanges (was: area code named beer) Message-ID: <4E781340.email@example.com> On Mon, 19 Sep 2011 16:46:05 -0700 (PDT), Wes Leatherock <wleat...@yahoo.com>> wrote: > There were also some locations where a community of interest > existed between offices in different area codes, where the > prefix had to be "protected" in both area codes. > A prime example was the greater Kansas City Metropolitan > exchange, since the metro area extended across two states with > seven-digit dialing. The Missouri side had area code 816, the > Kansas side 918. You mean 913. > Of course, this consideration ceased to be a factor when > mandatory 10-digit (or 11-digit) dialing on local calls came > into existence. Don't those two cities have independent 7-digit dialing plans now? I thought 816 and 913 each had 7-digit dialing internally but 11-digit dialing across the river Another example: DC/Maryland/Virginia metro area. Before 1953, the entire area had a single 6-digit dialing plan (2L+4D). In '53, 7-digit dialing was introduced (2L+5D). Sometime later, the dialing plan was split by area code, with 10-digit dialing across boundaries. Since then, both Maryland and Virginia have gotten overlays, so the metro area now has five area codes with 10-digit dialing in Maryland (240+301) and Virginia (671+703). DC (202 still has 7-digit dialing. I suppose someday 202 will need relief, with the obvious choice being an overlay. However, somebody here on T-D once suggested a split of sorts: put the federal government in its own area code -- 666. Neal McLain
Date: Tue, 20 Sep 2011 15:28:23 -0700 (PDT) From: Neal McLain <firstname.lastname@example.org> To: email@example.com. Subject: Re: EXchanges (was: area code named beer) Message-ID: <firstname.lastname@example.org> On Sep 19, 11:14 pm, Neal McLain <nmcl...@annsgarden.com> wrote: > Another example: DC/Maryland/Virginia metro area. Before 1953, the > entire area had a single 6-digit dialing plan (2L+4D). In '53, 7-digit > dialing was introduced (2L+5D). Sometime later, the dialing plan was > split by area code, with 10-digit dialing across boundaries. Since > then, both Maryland and Virginia have gotten overlays, so the metro area > now has five area codes with 10-digit dialing in Maryland (240+301) and > Virginia (671+703). DC (202 still has 7-digit dialing. > > I suppose someday 202 will need relief, with the obvious choice being an > overlay. However, somebody here on T-D once suggested a split of sorts: > put the federal government in its own area code -- 666. > > Neal McLain Oops ... I mean 571, not 671. Neal
Date: Tue, 20 Sep 2011 20:12:20 -0700 (PDT) From: HAncock4 <email@example.com> To: firstname.lastname@example.org. Subject: Re: EXchanges (was: area code named beer) Message-ID: <email@example.com> On Sep 20, 12:14~am, Neal McLain <nmcl...@annsgarden.com> wrote: > I suppose someday 202 will need relief, with the obvious choice being an > overlay. ~However, somebody here on T-D once suggested a split of sorts: > put the federal government in its own area code -- 666. Speaking of Washington . . . Washington went dial around 1930. Washington grew somewhat during the New Deal as the alphabet soup agencies were formed, but then grew tremendously during WW II. (The Pentagon alone had about a 16,000 station PBX. See David Brinkley's excellent "Washington Goes to War".) Would anyone know what kind of switch type was used for Washington dial service, especially as the city grew? Also, did Washington get any special long distance switches or trunks to meet wartime demand? Did the military have an early version of Autovon during WW II to interconnect Washington with military bases around the country? I recall reading that they did build a new cross country toll line just before the war, but I can't recall the details. The No. 4 toll crossbar switch first went into service during WW II, but it was based in Philadelphia, not Washington. Also, to meet war time traffic needs, they narrowed the bandwidth on toll lines to squeeze in more capacity. With the press of wartime traffic, long distance facilities to/from Washington must have been strained. I wonder what percentage of toll calls were completed on a demand basis vs. a delayed basis, and if operators had a priority system for handling calls. (There's a Bell Labs volume on military service, but it's mostly about fire control, radar, and military radio communications.)
Date: Tue, 20 Sep 2011 22:58:56 -0400 From: Monty Solomon <firstname.lastname@example.org> To: email@example.com. Subject: Apple makes a hash of password security (again) Message-ID: <firstname.lastname@example.org> Apple makes a hash of password security (again) Shadow boxing By John Leyden 19 September 2011 Apple has dropped a couple of monumental password security clangers with the release on OS X Lion, according to security blogger Patrick Dunstan. Dunstan, who posted an important piece on cracking Mac OS X passwords a couple of years ago, decided to revisit the subject with the release of OS X Lion (version 10.7). He discovered Apple's developers had made user security worse in two important ways: firstly, it's possible to change the password of the current user without needing to know the original password, as Dunstan explains. ... http://www.theregister.co.uk/2011/09/19/apple_password_security_exposed/
Date: Tue, 20 Sep 2011 22:58:56 -0400 From: Monty Solomon <email@example.com> To: firstname.lastname@example.org. Subject: OnStar Begins Spying On Customers' GPS Location For Profit Message-ID: <email@example.com> OnStar Begins Spying On Customers' GPS Location For Profit Posted on September 20, 2011 by Jonathan Zdziarski I canceled the OnStar subscription on my new GMC vehicle today after receiving an email from the company about their new terms and conditions. While most people, I imagine, would hit the delete button when receiving something as exciting as new terms and conditions, being the nerd sort, I decided to have a personal drooling session and read it instead. I'm glad I did. OnStar's latest T&C has some very unsettling updates to it, which include the ability to sell your personal GPS location information, speed, safety belt usage, and other information to third parties, including law enforcement. To add insult to a slap in the face, the company insists they will continue collecting and selling this personal information even after you cancel your service, unless you specifically shut down the data connection to the vehicle after canceling. ... http://www.zdziarski.com/blog/?p=1270
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