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Digital Signal 1 (DS1, sometimes DS-1) is a T-carrier signaling scheme devised by Bell Labs. [1] DS1 is the primary digital telephone standard used in the United States , Canada and Japan and is able to transmit up to 24 multiplexed voice and data calls over telephone lines.
Strictly speaking, a DS1 is the data carried on a T1 circuit, and likewise for a DS3 and a T3, but in practice the terms are used interchangeably. There are other data rates in use, e.g., military systems that operate at six and eight times the DS1 rate.
The DS technically refers to the rate and format of the signal, while the T designation refers to the equipment providing the signals. In practice, "DS" and "T" are used synonymously; for example, DS1 and T1, DS3 and T3. [1]
DS1 or DS-1 may refer to: BOSS DS-1, a guitar distortion pedal; Digital Signal 1, a T-carrier signaling scheme devised by Bell Labs; Deep Space 1, a mission to 9969 Braille & 19P/Borrelly; DS-1 (drug), a selective GABA A α4β3δ agonist drug; South African Class DS1, a diesel locomotive class; Datsun DS-1, a car by Nissan, see Datsun DS Series
Deep Space 1 (DS1) was a NASA technology demonstration spacecraft which flew by an asteroid and a comet. It was part of the New Millennium Program , dedicated to testing advanced technologies. Launched on 24 October 1998, the Deep Space 1 spacecraft carried out a flyby of asteroid 9969 Braille , which was its primary science target.
Each VTG can then be subdivided into four VT1.5 signals, each of which can carry a PDH DS1 signal. A VTG may instead be subdivided into three VT2 signals, each of which can carry a PDH E1 signal. The SDH equivalent of a VTG is a TUG-2; VT1.5 is equivalent to VC-11, and VT2 is equivalent to VC-12.
A digital cross-connect system (DCS or DXC) is a piece of circuit-switched network equipment, used in telecommunications networks, that allows lower-level TDM bit streams, such as DS0 bit streams, to be rearranged and interconnected among higher-level TDM signals, such as DS1 bit streams.
If cross-connect capability is to be maintained at the VT1.5 level, then the individual DS1 signals are extracted from a parent DS3 or electrical T1, and then transmuted individually into each VT1.5. If a complete DS3 signal is to be delivered to a SONET drop, then the entire DS3 is transmuted intact into an STS container and no subsequent ...