To All, If you are really interested on why we have all these "standards" for cell phones, American Heritage Invention & Technology magazine had a great article on the development of mobile phone technology since the 1940s
You can find it here: http://www.americanheritage.com/articles/magazine/it/2007/3/2007_3_8.shtml Phil > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of STANLEY DOORE > Sent: Friday, March 16, 2007 2:36 AM > To: U.S. Metric Association > Subject: [USMA:38238] RE: Brand New Phone, 12 Hour Time. > > Brian et al: > > Your first statement should be the ruling reason for everyone to use CDMA. > Technologically, CDMA uses spectrum more efficiently than others. There > is > limited amount of spectrum available to use for transmission as capacity > needed is increasing. > > We began using CDMA type of transmission on landlines for weather back in > the 1960s since we needed great capacity and fiber lines were not > available. > 2400 b/s and 4800 b/s were high-speed at that time. We found TDMA was > wasteful, restrictive and not cost-effective. > > Battery life for mobile devices will be increased as technological > advances > now under way will overcome the problem you mention. > > Regards, Stan Doore > > > > ----- Original Message ----- > From: "Brian White" <[EMAIL PROTECTED]> > To: "U.S. Metric Association" <[email protected]> > Sent: Friday, March 16, 2007 12:05 AM > Subject: [USMA:38231] RE: Brand New Phone, 12 Hour Time. > > > > CDMA is actually more efficient with spectrum usage. But I find battery > > life > > of CDMA phones to be less than GSM counterparts. I also hate the lack > of > > a > > SIM card in CDMA phones. CDMA phones have traditionally lagged GSM > phones > > in > > technology adoption like Bluetooth, etc... > > > > Europe just got together and agreed on a standard and moved forward. > Most > > rest of world countries copied Europe with GSM. Whereas in the United > > States, we let the markets decide. > > > > Which is silly to me because you have very redundant network build outs. > > So > > in any one area, you have AT&T Wireless/Cingular TDMA then GSM, > > Voicestream/T- > > Mobile GSM, Sprint CDMA, Verizon CDMA and Nextel iDEN. > > > > Actually Verizon choosing CDMA was something of a big deal. Verizon was > > partially owned by Vodafone, the European provider. They obviously > pushed > > for GSM. Verizon had some deal with Qualcomm going (they rule CDMA) and > > that's where they went. Vodaphone over time got rid of their investment > > in > > Verizon. > > > > What sucked about Cingular buying AT&T Wireless was that really, that > > should > > have been Vodafone's deal. (I could have gotten that Ferrari or McLaren > > branded cell phone right?) So the United States really should have had > > three GSM providers (Cingular, Vodafone and T-Mobile)....but alas, due > to > > some shrewd dealings, the deal was given to Cingular. Do some searches > on > > the deal, it was pretty sketchy. > > > > Nothing metric, but everything to do with the mindset of being > different. > > > > On Thu, 15 Mar 2007 23:47:09 -0400, Carleton MacDonald wrote > >> Well, there is something related - CDMA is another case of the USA > doing > >> things differently than 80% of the rest of the world ... > >> > >> Wonder which is actually better. > >> > >> Carleton > >> > >> -----Original Message----- > >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > >> Behalf > >> Of Michael Payne > >> Sent: Thursday, March 15, 2007 23:07 > >> To: U.S. Metric Association > >> Subject: [USMA:38224] RE: Brand New Phone, 12 Hour Time. > >> > >> Not that this has much to do with metric, but I switched from > >> Cingular to T-Mobile just over a year ago and I've found the > >> coverage with T-Mobile better using a GSM phone, I also use my phone > >> worldwide. > >> > >> Michael Payne > >> ----- Original Message ----- > >> From: "Nat Hager III" <[EMAIL PROTECTED]> > >> To: "U.S. Metric Association" <[email protected]> > >> Sent: Friday, 16 March 2007 02:59 > >> Subject: [USMA:38222] RE: Brand New Phone, 12 Hour Time. > >> > >> >>> You actually cared about TDMA coverage and left Cingular because of > >> >>> that? > >> > > >> > Wow, you deserve the 12 hour time then. hahahaha.. Of course, > maybe > >> > I'm > >> > spoiled because I'm in Seattle. Home of both AT&T Wireless (before > >> > Cingular > >> > bought them) and T-Mobile. > >> >>> > >> > > >> > You bet. In 2005 Cingular GSM coverage was only slightly better than > >> > T-Mobile, in 2004 it was experimental on the weaker 1900 MHz band > only, > >> > my > >> > phone switched to TDMA half the time. > >> > > >> > Nat > >> > > >> > > >> > > > > >
