Editing Bipolar encoding (section)

== Voltage build-up ==

The use of a bipolar code prevents a significant build-up of [[Direct current|DC]], as the positive and negative pulses average to zero volts. Little or no DC-component is considered an advantage because the cable may then be used for longer distances and to carry power for intermediate equipment such as line [[repeater]]s.<ref name="digitallink">[http://www.stromcarlson.com/docs/basics/t1svcfund.pdf "T1 Fundamentals", Revision 1.0, dated 23 January 1997, by Digital Link, retrieved on 25 January 2007] {{webarchive |url=https://web.archive.org/web/20070129031144/http://www.stromcarlson.com/docs/basics/t1svcfund.pdf |date=January 29, 2007 }}</ref> The DC-component can be easily and cheaply removed before the signal reaches the decoding circuitry.