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Subscriber loop carrier
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<h2 id="reliability">Reliability</h2> <p>SLCs have been criticized for reducing the reliability of <a href="/facts/Local_loop/rSRfLPaq">local loops</a> due to their increased reliance on utility power. Historically, all loop power was provided by the CO and was backed up by battery power and, for longer power outages, stand-by diesel generators housed at the office. However, telephone companies have increasingly been using SLCs, which are notorious for poorly functioning or short-lived battery backup systems, some lasting as little as four hours. Many do not have on-site standby generators, which requires the telephone company to bring out a portable generator before the battery power fails. This may not happen in time if there are obstructions caused by a natural or man-made disaster, causing service outages for anyone served by that unit. Often, the air conditioning units, sump pumps, and even lights are not backed up in those units, which can cause equipment overheating and flooding issues.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a><a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Pair_gain/1175E1Rf">Pair gain</a></li> <li><a href="/facts/Distributed_switching/pAaIXKp2">Distributed switching</a></li> <li><a href="/facts/Digital_loop_carrier/RMt3Uzc3">Digital loop carrier</a></li> <li><a href="/facts/Telephone_line/YdKUAka9">Telephone line</a></li> <li><a href="/facts/Remote_concentrator/In5XYdlk">Remote concentrator</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Remote Terminal". www.rayvaughan.com. Retrieved 2020-07-07. <a href="http://www.rayvaughan.com/remote_terminal.htm" target="_blank">http://www.rayvaughan.com/remote_terminal.htm</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Does ISDN Need Its Own Power Backup?". BellSouth Business. Archived from the original on 2006-07-13. <a href="https://web.archive.org/web/20060713233645/https://www.bellsouth.com/smallbusiness/products/data/isdn/faqs.html#POWER" target="_blank">https://web.archive.org/web/20060713233645/https://www.bellsouth.com/smallbusiness/products/data/isdn/faqs.html#POWER</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>