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Farley, Tom (1 January 2006). "Cellular Telephone Basics". Privateline.com. Archived from the original on 5 December 2015 . Retrieved 30 December 2012.
John Lossing, Woodrow Wilson. Harpers' Encyclopædia Of United States From 458 A. D. To 1905, Harper & Brothers, 1905. Original from Pennsylvania State University, Digitized: 25 June 2009. July 1920: World's first radiotelephone service commences public service between Los Angeles and Santa Catalina Island. [23]Codes beginning 00 were also used for premium rate numbers or as a short code for dialling calls to various places in the Republic of Ireland over the next few decades. While the transmission of speech by signal has a long history, the first devices that were wireless, mobile, and also capable of connecting to the standard telephone network are much more recent. The first such devices were barely portable compared to today's compact hand-held devices, and their use was clumsy. Fluhr, Zachary C. & Nussbaum, Eric (November 1973). "Switching Plan for a Cellular Mobile Telephone System". IEEE Transactions on Communications. 21 (11): 1281–1286. doi: 10.1109/TCOM.1973.1091569.
After the migration of geographic 0xxx area codes to new 01xxx codes on PhONEday (also 0xx → 01xx and 0xxxx → 01xxxx of course), some of the old area codes had started to be re-used for other purposes. For example, 0870 (Isle of Benbecula, Outer Hebrides) had been moved to 01870 and now 0870 started to be re-used for non-geographic services. Oftel had to issue a warning to operators to remove their "this number has changed, please redial inserting a one after the initial zero" messages that had been applied on PhONEday [55] so that callers could get through to the new non-geographic numbers. Agar, Jon (2004). Constant Touch: a Global History of the Mobile Phone. Cambridge: Icon. ISBN 978-1-84046-541-9. Charles Bourseul Johann Philipp Reis Elisha Gray Thomas Edison Alexander Graham Bell Thomas Augustus Watson Tivadar Puskás Emile Berliner Charles Sumner Tainter Theodore Newton Vail 1667 to 1875 [ edit ] From around 1980, calls to Radiophones could also be direct dialled. [20] 0034—Area 1 (Greater London) 0036—Area 2 (Severn and Midlands) 0037—Area 3 (Liverpool and the North-East) 0033—Area 4 (Southern and Eastern Scotland) 0039—Area 5 (Southern England) Hounshell, David A. 1975. "Elisha Gray and the Telephone: On the Disadvantages of Being an Expert", Technology and Culture, 1975, Vol. 16, No. 2, pp. 133–161.February 1876, about 1:30 pm: Approximately two hours later Elisha Gray's patent caveat is registered in the cash blotter. Although his caveat was not a full application, Gray could have converted it into a patent application and contested Bell's priority, but did not do so because of advice from his lawyer and his involvement with acoustic telegraphy. The result was that the patent was awarded to Bell. [5] Numbers in the 020 0xxx xxxx and 020 1xxx xxxx number ranges have also been made available. However, these numbers cannot be dialled without the 020 code and are called "National Dialling Only" numbers. They are mainly used as termination points for non-geographic numbers, and for various alarm and other automated systems where the actual telephone number itself is never called
February 1876, about 9:30 am: Gray or his lawyer brings Gray's patent caveat for the telephone to the Washington, D.C. Patent Office (a caveat was a notice of intention to file a patent application. It was like a patent application, but without a request for examination, for the purpose of notifying the patent office of a possible invention in process). BT Cellnet started with 07801 xxxxxx, 07803 xxxxxx, 07808 xxxxxx and 07809 xxxxxx. Vodafone started with 07771 xxxxxx and 07775 xxxxxx in May 1997. [37] One2One started using 07804 xxxxxx and 07806 xxxxxx numbers in May 1995. [37] 07xxx codes for new allocations by operators have been issued by Oftel since May 1997. [43] It would be another few years before older BT Cellnet 0802 xxxxxx numbers were converted to 07802 xxxxxx, Vodafone 0370 xxxxxx numbers were converted to 07770 xxxxxx and One2One 0961 xxxxxx numbers were converted to 07961 xxxxxx in the Big Number Change. Universal phone charger standard approved". ITU (Press release). 22 October 2009. Archived from the original on 23 December 2009 . Retrieved 22 June 2010. As of 14June2007 [update], all new mobile phones applying for a license in China are required to use a USB port as a power port for battery charging. [57] [58] This was the first standard to use the convention of shorting D+ and D−. [59] OMTP/GSMA Universal Charging Solution [ edit ]numbers initially allowed revenue share. These numbers are easy to mistake for mobile phone numbers and many scams developed. Oftel consulted on various proposals. [39] [40] [41] Eventually revenue share was banned on these lines [42] and they also fell under the jurisdiction of ICSTIS (nowadays PhonepayPlus), the premium rate services regulator.
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