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A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952.
The digital television transition, also called the digital switchover (DSO), the analogue switch/sign-off (ASO), the digital migration, or the analogue shutdown, is the process in which older analogue television broadcasting technology is converted to and replaced by digital television.
The digital stations are being deployed using new facilities at Ulupalakua and the old towers will be removed before bird nesting season begins in March. By making the switch early, the broadcast towers atop Haleakala near the birds' nesting grounds can be dismantled without interfering with the Hawaiian petrels' nesting season. [42]
Currently the terrestrial transmission is available in both digital and analog formats. The Cable Digitalisation Act mandates all cable television networks to turnoff analogue transmission and switch to digital transmission by 31 March 2015. The digital transition is planned over four phases in the country. [18] Tata Sky Dish India
GTD-3 EAX (Toll switch, NOT CCS7 capable although CCIS capable) GTD-5 EAX (Class 5 switch, many in use today, was the primary switch in former GTE exchanges. Now supported by Lucent.) GTD-120 Digital PABX; GTD-1000 Digital PABX; GTD-4600 Digital PABX; OMNI-S1 Digital PABX; OMNI-S2 Digital PABX; OMNI-S3 Digital PABX
Time-division multiplexing (TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time according to agreed rules, e.g. with each transmitter working in turn.
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