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The BT Hub Phone is an optional handset that can be bought to work in conjunction with the BT Home Hub 1, 1.5, and 2.0. It calls using the BT Broadband Talk service, and may sit in a dock in the front of the Home Hub or be used on its own stand. It uses Hi-def sound technology when calls between Hub Phones are made.
Bluetooth devices intended for use in short-range personal area networks operate from 2.4 to 2.4835 GHz. To reduce interference with other protocols that use the 2.45 GHz band, the Bluetooth protocol divides the band into 80 channels (numbered from 0 to 79, each 1 MHz wide) and changes channels up to 1600 times per second.
Marconi System X originally developed by the British Post Office (later BT), GEC, Plessey and STC, is a type of digital exchange used by BT Group in the UK public telephone network. A digital exchange (Nortel DMS-100) used by an operator to offer local and long-distance services in France. Each switch typically serves 10,000–100,000 ...
This plate is fitted by the consumer inside the NTE 5 and reduces interference carried by the 3rd (bell) wire. The reduced interference allows faster broadband speeds - BT claim a speed improvement of up to 1.5 Mbit/s with a theoretical 4 Mbit/s. By November 2009 BT were calling the I-plate a "BT Broadband Accelerator".
For data communication, the overall length of time required to establish a circuit-switched call between terminals; i.e., the time from the initiation of a call request to the beginning of the call message. Note: Call set-up time is the summation of: (a) call request time—the time from initiation of a calling signal to the delivery to the ...
For voice and media encoding, a variety of codecs are available, such as for audio: G.711, GSM, iLBC, Speex, G.729, G.722, G.722.2 (AMR-WB), other audio codecs, and for video H.263, H.263+, H.264. User interface software controls the operation of the hardware components, and may respond to user actions with messages to a display screen.
1-5-7-1 is a family of calling features in the United Kingdom, for residential and business telephone lines and for mobile telephones, that are provided by BT Group and several other telephone service providers.
The 21st Century Network (21CN) programme is the data and voice network transformation project, under way since 2004, [1] of the UK telecommunications company BT Group plc. It was intended to move BT's telephone network from the AXE/System X Public Switched Telephone Network (PSTN) to an Internet Protocol (IP) system. As well as switching over ...