Editing Ringer equivalence number (section)

{{short description|Indication of the electrical load on a telephone line}}
The '''ringer equivalence number''' ('''REN''') is a [[telecommunications]] [[measurement|measure]] that represents the [[electrical load]]ing effect of a [[telephone]] ringer on a [[telephone line]]. In the United States, '''ringer equivalence''' was first defined by [[U.S. Code of Federal Regulations]], [[Title 47 CFR Part 68|Title 47, Part 68]], based on the load that a standard [[Bell System]] [[model 500 telephone]] represented, and was later determined in accordance with specification ''ANSI/TIA-968-B'' (August 2009).  Measurement systems analogous to the REN exist internationally.