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- s_line abstract "A 56 kbit/s line is a digital connection capable of carrying 56 kilobits per second (kbit/s), or 56,000 bit/s, the data rate of a classical single channel digital telephone line in North America. In many urban areas, which have seen wide deployment of faster, cheaper technologies, 56 kbit/s lines are generally considered to be an obsolete technology.The figure of 56 kbit/s is derived from its implementation using the same digital infrastructure used since the 1960s for digital telephony in the PSTN, which uses a PCM sampling rate of 8,000 Hz used with 8-bit sample encoding to encode analogue signals into a digital stream of 64,000 bit/s. However, in the T-carrier systems used in the U.S. and Canada, a technique called bit-robbing uses, in every sixth frame, the least significant bit in the time slot associated with the voice channel for Channel Associated Signaling (CAS). This effectively renders the lowest bit of the 8 speech bits unusable for data transmission, and so a 56 kbit/s line used only 7 of the 8 data bits in each sample period to send data, thus giving a data rate of 8000 Hz × 7 bits = 56 kbit/s.".
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- s_line wikiPageRevisionID "673476702".
- s_line wikiPageWikiLink Analog_signal.
- s_line wikiPageWikiLink Bit.
- s_line wikiPageWikiLink Bit_rate.
- s_line wikiPageWikiLink Category:Telecommunications_standards.
- s_line wikiPageWikiLink Channel-associated_signaling.
- s_line wikiPageWikiLink Data.
- s_line wikiPageWikiLink Data_rate_units.
- s_line wikiPageWikiLink Digital_Signal_0.
- s_line wikiPageWikiLink Frame_(networking).
- s_line wikiPageWikiLink Integrated_Services_Digital_Network.
- s_line wikiPageWikiLink Kilobit.
- s_line wikiPageWikiLink List_of_ITU-T_V-series_recommendations.
- s_line wikiPageWikiLink Modem.
- s_line wikiPageWikiLink North_America.
- s_line wikiPageWikiLink Obsolescence.
- s_line wikiPageWikiLink Public_switched_telephone_network.
- s_line wikiPageWikiLink Pulse-code_modulation.
- s_line wikiPageWikiLink Robbed-bit_signaling.
- s_line wikiPageWikiLink Sampling_(signal_processing).
- s_line wikiPageWikiLink Switch56.
- s_line wikiPageWikiLink T-carrier.
- s_line wikiPageWikiLink Telephony.
- s_line wikiPageWikiLinkText "56 kbit/s line".
- s_line wikiPageWikiLinkText "56 kbit/s".
- s_line wikiPageUsesTemplate Template:FOLDOC.
- s_line wikiPageUsesTemplate Template:Telecomm-stub.
- s_line subject Category:Telecommunications_standards.
- s_line hypernym Connection.
- s_line type Road.
- s_line comment "A 56 kbit/s line is a digital connection capable of carrying 56 kilobits per second (kbit/s), or 56,000 bit/s, the data rate of a classical single channel digital telephone line in North America.".
- s_line label "56 kbit/s line".
- s_line sameAs Q422028.
- s_line sameAs s.
- s_line sameAs m.08rzz.
- s_line sameAs Q422028.
- s_line wasDerivedFrom s_line?oldid=673476702.
- s_line isPrimaryTopicOf s_line.