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The Telecom Digest for December 02, 2010
Volume 29 : Issue 325 : "text" Format

Messages in this Issue:

Re: Mobile Phone Forwarding Question(John Levine)
Re: Mobile Phone Forwarding Question(David Clayton)
Re: US may disable all in-car mobile phones(Richard)
Re: Screw terminals (was: How Ma Bell Shelved the Future for 60 Years) (Adam H. Kerman)

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Date: 1 Dec 2010 02:38:15 -0000 From: John Levine <johnl@iecc.com> To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org. Subject: Re: Mobile Phone Forwarding Question Message-ID: <20101201023815.39987.qmail@joyce.lan> >>My wife owns an AT&T mobile phone. This weekend she'll get a T-Mobile >>phone at LAX before she flies to Australia with Oprah Winfrey. Her >>existing number is and her new number will be +1-512 numbers. I'm >>considering forwarding her AT&T phone to her T-Mobile phone so she can >>receive calls at her known, existing number while in Australia. My >>question is which phone will take the hit on the bill? The AT&T or >>T-Mobile phone? As far as AT&T is concerned, the forward is just a domestic call. Any call your wife answers in Australia on her T-Mo phone, whether forwarded from the AT&T phone or otherwise, gets charged T-Mo's roaming rate which their web site says is $1.69 per minute. Getting a prepaid phone in oz with an Australian phone number is not a bad idea. If you get the World Connect add-on to her AT&T plan for the period when she's away ($4/mo, prorated to the number of days you have it active) forwarded calls to her mobile are only 24 cents/min. Australian mobiles don't charge for incoming calls, so that's the only cost for the call. If you have a decent long distance plan on your landline, their rate for calling her mobile should be about the same price. R's, John
Date: Wed, 01 Dec 2010 13:58:37 +1100 From: David Clayton <dcstar@myrealbox.com> To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org. Subject: Re: Mobile Phone Forwarding Question Message-ID: <pan.2010.> On Tue, 30 Nov 2010 18:01:23 -0600, Robert Bonomi wrote: ........ > NOTE: If, as you indicated, the T-Mobile phone will have a U.S. phone > number calls to it, when in Australia will be charged international > 'roaming' rates. These rates can be, depending on carrier, etc, > described as 'extortionate'. as in multi-dollar _per-minute_. It may > make good sense to wait until arrival in AU, and buy a local phone > once there. Then forward the AT&T phone to the AU number. Ideally, > you'll only get hit for the 'basic' international call rate to AU, that > way, because there is no 'roaming' involved. The -possible- 'gotcha' to > that arrangement is if AU is "Caller pays" to cell numbers, and they > charge excessive premiums for foreign origins. > Calls from Australian networks to US numbers seem to be charged at the one rate regardless of the destination. Looking at the T-mobile site is says roaming in Australia costs $1.69/min with "*Roaming charges do not include local tolls or long distance charges." (whatever that actually means). The T-mobile rates to Australia are 25c/min, so the call forwarding option may well be the better option. Mobile call rates from Australia to the US from a mobile are around $A0.29c/min + 40c flagfall (Optus). This website can help in finding a cheap mobile pre-paid service in Australia: http://www.phonechoice.com.au/index.cfm?Section=Mobile -- Regards, David. David Clayton Melbourne, Victoria, Australia. Knowledge is a measure of how many answers you have, intelligence is a measure of how many questions you have.
Date: Tue, 30 Nov 2010 22:37:43 -0800 From: Richard <rng@richbonnie.com> To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org. Subject: Re: US may disable all in-car mobile phones Message-ID: <43rbf6589kt8r28plnmovsijg1egga3tsa@4ax.com> On Tue, 30 Nov 2010 11:02:56 -0800 (PST), Lisa or Jeff <hancock4@bbs.cpcn.com> wrote: >On Nov 23, 4:54 pm, Stephen <stephen_h...@xyzworld.com> wrote: > >> >It's not holding the cellphone, but the conversastion itself.  Thus, >> >hands-free phones are not the answer. >> >> If this is true (rather than shades of gray) then it isnt the >> cellphone that is the problem, but the distraction. >> >> time to ban talking in cars, kids in the back seat and all the other >> distractions that have caused accidents......... > >Those distractions you mention are separate issues. > >The issue at hand is cell phone conversations while driving a car. No, the issue is the distraction from the main task of driving, whether it's talking on a cell phone, changing the station of the radio, or scolding the kids. There may be different levels of distraction, but they all impact negatively on driving ability. Dick
Date: Wed, 1 Dec 2010 06:44:07 +0000 (UTC) From: "Adam H. Kerman" <ahk@chinet.com> To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org. Subject: Re: Screw terminals (was: How Ma Bell Shelved the Future for 60 Years) Message-ID: <id4qrm$pc0$1@news.albasani.net> Robert Bonomi <bonomi@host122.r-bonomi.com> wrote: >Adam H. Kerman <ahk@chinet.com> wrote: >>Robert Bonomi <bonomi@host122.r-bonomi.com> wrote: >>>Not those specific deficiencies, as much as inductive pick-up due to the >>>lack of 'twist'. >>>Some years back I lived in a 1964 construction 32-unit (8 units/floor, 4 >>>floors) apt building, about 6,000 wire-feet from the C.O.. One 50-pair >>>drop to the building, terminated on screw terminals. The 'house' wiring >>>was "quad" (J-K), _in_conduit_, with the 4 vertically aligned units sharing >>>a common conduit. >>In the days when I was more ignorant, I bought a spool of this kind of wire. >>It was twisted. I have no idea if the twisting was tested and avoided any >>kind of antennuation. Was it? >'quad' wire has the four conductors stacked in a square arrangement, with >a gradual (guessing at circa 1 'turn' per 8",-- don't have any handy to >check) twist of all 4 wires as_a_unit -- a 4-strand helix, as it were. >Thus, with respect to the other wires in the cable, its just as if it >was absolutely straight conductors. Even if there is 'nothing' on the >other wires in the cable, you've got inductive coupling from the linear >'single- turn transformer". I take it that's for nothing more than preventing kinks when going around corners inside walls. I sort of assumed that it didn't address interference at all. >>Is there an actual problem with screw terminals, other than the amount of >>space the consume versus a punch-down block? Is oxidation a concern? >It is, as they say "performance limiting". when the "terminals' for a 'pair' >are more than an inch apart, it is very difficult to maintain, say, the >Cat 5 required 'twist rate' to within 1/2" of the connection point (which >_has_ to be an 8P8C, per the standard). <wry grin> But that standard is for data, not voice. I figured it would work for voice. >Also, "as installed", the cross-connects between the termination of the >50-pair drop to the building and the termination block for the 'house' >wiring was all _single-strand_ hook-up cable. easily 6'-plus lengths. That's what I figured. >Oxidation, as such, was not an issue. While the feed cable was underground >all the way from the C.O., each pair went through a 'protector' before >reaching the cross-connect terminals. Thanks. >>A friend says he used to have a DSL line at his house to help him monitor >>computer networks at his business on this kind of ancient inside wiring. >It's -not- all that 'ancient'. I don't have a hard date for when the >industry shifted to using 'twisted pair' for most/all _residential_ wiring, >but 'quad' was still being commonly installed in the mid- to late- 1980s. >_Commercial_ installations had -- mostly, if not entirely -- cut over to >'twisted pair' in the prior decade, for wiring installs, driven by digital >phone systems, the explosion of computer terminals that could use a >'common' structured wiring system -- e.g. IBM 3270 over twisted-pair, vs. >dedicated coax. The cost advantage of 'structured' wiring in a commercial >environment was a very "compelling" argument. Sure. It's interesting that AT&T didn't switch over early for residential. After all, in the quanties they consumed, that would have driven down the per unit cost right off.
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End of The Telecom Digest (4 messages)

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