E and M signaling
id:
e-and-m-signaling-179-10023
title:
E and M signaling
text:
E and M signaling is a type of supervisory line signaling that uses DC signals on separate leads, called the "E" lead and "M" lead, traditionally used in the telecommunications industry between telephone switches. Various mnemonic names have been used to memorize these letters, such as Earth and Magneto or Ear and Mouth, the most common variation. E&M was originally developed for signaling between PABXs in different geographic locations over an analog private circuit. The protocol was later exte
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/E_and_M_signaling
date created:
2005-06-03T18:02:24Z
date modified:
2024-09-04T20:18:07Z
main entity:
{"identifier":"Q2836885","url":"https://www.wikidata.org/entity/Q2836885"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/e/e1/E_and_M_signaling_8_Wire.png","width":505,"height":398}
fields total:
13
integrity:
15