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Virtually all new cordless phones sold in the US use DECT 6.0 on the 1.9 GHz band, though legacy phones can remain in use on the older 900 MHz, 2.4 GHz and 5.8 GHz bands. There is no specific requirement for any particular transmission mode on the older bands, but in practice many legacy phones also have digital features such as DSSS and FHSS .
As demand for telephones grew, more telephone numbers were required. This would often see an exchange with existing three-digit numbers open one or more new ranges with four-digit local numbers (e.g. 5000-6999), and exchanges with existing four-digit numbers open one or more new ranges with five-digit local numbers (e.g. 60000–69999).
Non-geographic numbers were introduced to offer services that were historically unavailable on standard landline phone numbers, particularly in terms of call routing and special charging arrangements. Advertised benefits of non-geographic numbers include: [1] [2] Call Routing. Calls can be flexibly redirected to virtually any destination.
The 0800 range can have NSN length as 10, 9, or 7 digits. The 0845 range can have NSN length as 10 or 7 digits. The 0500 range had NSN length as 9 digits only, and was withdrawn from use on 3 June 2017. All other UK numbers have NSN length of 10 digits. There are no telephone numbers in the UK with an NSN length of 8 digits.
0800 later used for BT Freefone numbers - usage of BT 9-digit 0800 numbers continued after the Big Number Change; all new 0800 allocations have 10 digits and multiple operators now issue 0800 numbers. 01801 — unused; 0801 was Thrapston, Oundle – – Was originally 0085 (OU5) until changed to 0801 in 1968 – numbers were transferred to 0832 ...
The initial network only supported outgoing calls, but offered paging and messaging facilities as standard on all customer accounts. The service was rolled out after extensive tests with 1,000 users and 2,000 base stations located across the UK. Original plans were for 12,000 base stations to be placed around the UK by December 1992.
Calls via the home base station would be routed via the home telephone line and in this configuration the system was identical to a standard cordless phone, for both incoming and outgoing calls. Once out of range of the home, the CT2 user could find signs indicating a network base station in the area, and make outgoing calls (but not receive ...
The Tele. 162 Handset Micro Telephone, was the first UK phone to incorporate the transmitter and receiver into a single unit, 'The Handset', which had not been used on telephones in the UK since the very early metal and wood cased models, and the BPO preference for a separate transmitter and Bell receiver, as on the Tele. 150 and Tele. 121.
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