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- Loop_start abstract "Loop start is a telecommunications supervisory signal provided by a telephone or private branch exchange (PBX) equipment in response to the establishment of a closed local loop, commonly referred to as the off-hook state. When idle, or on-hook, the loop potential is held a nominal 48V DC, provided by the telephone exchange or a foreign exchange station (FXS) interface. When a terminal initiates use of the line, it causes current to flow by closing the loop, and this signals the FXS end to provide dial tone on the line and to expect dial signals, in form of DTMF digits or dial pulses, or a hook flash. When the loop is opened and current stops flowing, the subscriber equipment signals that it has finished using the line; the telephone exchange resets the line to an idle state. When the FXS rings a telephone, it superimposes an alternating current (AC) signal onto the line. The most common ringing frequency is 20Hz. This amplitude is typically approximately 90V, but regulations prescribe that a minimum of 40V must be recognized. The ringing power was historically produced by a hand-cranked generator in the operator console of the exchange, or attached to a customer's telephone.An alternative to loop start signaling is ground start signaling.".
- Loop_start wikiPageExternalLink _3133.htm.
- Loop_start wikiPageID "3883890".
- Loop_start wikiPageLength "2779".
- Loop_start wikiPageOutDegree "24".
- Loop_start wikiPageRevisionID "708265779".
- Loop_start wikiPageWikiLink Alternating_current.
- Loop_start wikiPageWikiLink Asterisk_(PBX).
- Loop_start wikiPageWikiLink BORSCHT.
- Loop_start wikiPageWikiLink Battery_drop.
- Loop_start wikiPageWikiLink Battery_reversal.
- Loop_start wikiPageWikiLink Business_telephone_system.
- Loop_start wikiPageWikiLink Category:Telephony_signals.
- Loop_start wikiPageWikiLink Dial_tone.
- Loop_start wikiPageWikiLink Disconnect_supervision.
- Loop_start wikiPageWikiLink Foreign_exchange_service_(telecommunications).
- Loop_start wikiPageWikiLink Ground_start.
- Loop_start wikiPageWikiLink Hook_flash.
- Loop_start wikiPageWikiLink Kewlstart.
- Loop_start wikiPageWikiLink Local_loop.
- Loop_start wikiPageWikiLink Off-hook.
- Loop_start wikiPageWikiLink Pulse_dialing.
- Loop_start wikiPageWikiLink Telecommunication.
- Loop_start wikiPageWikiLink Telephone.
- Loop_start wikiPageWikiLink Telephone_exchange.
- Loop_start wikiPageWikiLinkText "Battery reversal".
- Loop_start wikiPageWikiLinkText "Loop start".
- Loop_start wikiPageWikiLinkText "loop start".
- Loop_start wikiPageUsesTemplate Template:Onesource.
- Loop_start subject Category:Telephony_signals.
- Loop_start comment "Loop start is a telecommunications supervisory signal provided by a telephone or private branch exchange (PBX) equipment in response to the establishment of a closed local loop, commonly referred to as the off-hook state. When idle, or on-hook, the loop potential is held a nominal 48V DC, provided by the telephone exchange or a foreign exchange station (FXS) interface.".
- Loop_start label "Loop start".
- Loop_start sameAs Q6675861.
- Loop_start sameAs m.0b4zl4.
- Loop_start sameAs Q6675861.
- Loop_start wasDerivedFrom Loop_start?oldid=708265779.
- Loop_start isPrimaryTopicOf Loop_start.