Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q7447757> ?p ?o }
Showing triples 1 to 61 of
61
with 100 triples per page.
- Q7447757 subject Q8621151.
- Q7447757 abstract "In a conventional, analog two-way radio system, a standard radio has noise squelch or carrier squelch which allows a radio to receive all transmissions. Selective calling is used to address a subset of all two-way radios on a single radio frequency channel. Where more than one user is on the same channel, (co-channel users,) selective calling can address a subset of all receivers or can direct a call to a single radio. Selective calling features fit into two major categories: individual calling and group calling. Individual calls generally have longer time-constants: it takes more air-time to call an individual radio unit than to call a large group of radios.Selective calling is akin to the use of a lock on a door. A radio with carrier squelch is unlocked and will let any signal in. Selective calling locks out all signals except ones with the correct 'key', in this case a specific digital code. Selective calling systems can overlap; a radio may have (group call) and DTMF individual calling.Selective calling prevents the user from hearing others on a shared channel. It does not eliminate interference from co-channel users (other users on the same radio channel). If two users try to talk at the same time, the signal will be affected by the other party using the channel.Some selective calling systems experience falsing. In other words, the decoder activates when a valid signal is not present. Falsing may come from a maintenance problem or poor engineering.".
- Q7447757 wikiPageWikiLink Q1020768.
- Q7447757 wikiPageWikiLink Q1166054.
- Q7447757 wikiPageWikiLink Q118819.
- Q7447757 wikiPageWikiLink Q1247463.
- Q7447757 wikiPageWikiLink Q1308807.
- Q7447757 wikiPageWikiLink Q1379116.
- Q7447757 wikiPageWikiLink Q1404885.
- Q7447757 wikiPageWikiLink Q1437028.
- Q7447757 wikiPageWikiLink Q1474418.
- Q7447757 wikiPageWikiLink Q167270.
- Q7447757 wikiPageWikiLink Q173285.
- Q7447757 wikiPageWikiLink Q185585.
- Q7447757 wikiPageWikiLink Q192027.
- Q7447757 wikiPageWikiLink Q205234.
- Q7447757 wikiPageWikiLink Q238570.
- Q7447757 wikiPageWikiLink Q25504.
- Q7447757 wikiPageWikiLink Q259011.
- Q7447757 wikiPageWikiLink Q283919.
- Q7447757 wikiPageWikiLink Q39369.
- Q7447757 wikiPageWikiLink Q42848.
- Q7447757 wikiPageWikiLink Q47521.
- Q7447757 wikiPageWikiLink Q54173.
- Q7447757 wikiPageWikiLink Q5432790.
- Q7447757 wikiPageWikiLink Q5621865.
- Q7447757 wikiPageWikiLink Q6887221.
- Q7447757 wikiPageWikiLink Q752783.
- Q7447757 wikiPageWikiLink Q76463.
- Q7447757 wikiPageWikiLink Q847824.
- Q7447757 wikiPageWikiLink Q8621151.
- Q7447757 wikiPageWikiLink Q878344.
- Q7447757 wikiPageWikiLink Q941685.
- Q7447757 wikiPageWikiLink Q947493.
- Q7447757 wikiPageWikiLink Q99.
- Q7447757 description "Example of DTMF used as push-to-talk ID on a two-way radio system.".
- Q7447757 description "Example of a CCIR-format call.".
- Q7447757 description "Example of pick up and delivery truck radio traffic using Modat unit ID.".
- Q7447757 description "Single tone or tone burst selective calling audio example.".
- Q7447757 description "Sound of a two-tone sequential dial up paging terminal.".
- Q7447757 description "Two Quik-Call I sequences.".
- Q7447757 description "leading push-to-talk ID with data muting.".
- Q7447757 description "leading push-to-talk ID without data muting.".
- Q7447757 filename "CCIR 04221.ogg".
- Q7447757 filename "CEGL DKNP Z.ogg".
- Q7447757 filename "DTMF trucking push to talk ID example.ogg".
- Q7447757 filename "Modat trucking example with ID 6988103.ogg".
- Q7447757 filename "Simulated two tone sequential code 415.ogg".
- Q7447757 filename "TRucking leading PTT ID MDC1200 non-Motorola recvr.ogg".
- Q7447757 filename "Trucking tone burst.ogg".
- Q7447757 filename "Trucking w leading PTT ID using MDC1200.ogg".
- Q7447757 title "DTMF P-T-T ID".
- Q7447757 title "MDC-1200 sounds".
- Q7447757 title "MODAT push-to-talk ID".
- Q7447757 title "Quik-Call I".
- Q7447757 title "SelCall".
- Q7447757 title "Tone and voice paging example".
- Q7447757 title "Tone burst sound".
- Q7447757 type Thing.
- Q7447757 comment "In a conventional, analog two-way radio system, a standard radio has noise squelch or carrier squelch which allows a radio to receive all transmissions. Selective calling is used to address a subset of all two-way radios on a single radio frequency channel. Where more than one user is on the same channel, (co-channel users,) selective calling can address a subset of all receivers or can direct a call to a single radio.".
- Q7447757 label "Selective calling".