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Digital Subscriber Signalling System No. 1 (DSS1) is a digital signalling protocol (D channel protocol) used for the ISDN.It is defined by ITU-T I.411 (ETS 300 102 [1]).It supports Bearer Capability, Low Level Compatibility and High Level Compatibility, ANI, DNIS and redirected number signaling in both directions.
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.
A trunked radio system is an advanced alternative in which the channel selection process is done automatically, so as to avoid channel conflicts and maintain frequency efficiency across multiple talkgroups. This process is handled by what is essentially a central radio traffic controller, a function automatically handled by a computer system.
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.
Digital Signal 3 (DS3 or T3 line) is a digital signal level 3 T-carrier.The data rate for this type of signal is 44.736 Mbit/s (45 Mb). It can transport 28 DS1 level signals within its payload.
SONET and SDH, which are essentially the same, were originally designed to transport circuit mode communications, e.g. DS1, DS3, from a variety of different sources. However, they were primarily designed to support real-time, uncompressed, circuit-switched voice encoded in PCM format. [1]
High-bit-rate digital subscriber line (HDSL) is a telecommunications protocol standardized in 1994. [1] It was the first digital subscriber line (DSL) technology to use a higher frequency spectrum over copper, twisted pair cables.
In October 2011, the R4 cards were banned in France. While Nintendo's original lawsuit was dismissed on the basis that the devices could be used to make homebrews and develop software in 2009, [ 9 ] the 2011 ruling reversed this, and the Paris court of appeals ruled against five R4 sellers and distributors.