RJ-11


Also found in: Dictionary, Thesaurus, Medical, Acronyms.

RJ-11

(hardware, communications)
An American-style telephone jack with six possible connections. A telephone normally uses two pairs of wires. Often found on the back of US-manufactured modems or for connection to a leased line.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

RJ-11

(Registered Jack-11) A telephone interface that uses a cable of twisted wire pairs and a modular jack with two, four or six contacts. RJ-11 is the common connector for plugging a telephone into the wall and the handset into the telephone. See modular connector.

RJ-11, 14, 25 - One, Two and Three Lines
RJ-11 cables can hold six wires for up to three telephone lines, and their nomenclature is technically RJ-11, RJ-14 or RJ-25 depending on the number of lines (see chart below).

RJ-21X, RJ-26X and RJ-27X
For PBX and other telecom connections, RJ-21X, 26X and 27X cables use a 50-pin Centronics-style "Miniature Ribbon" connector to handle 25 telephone lines in one cable.

C and W
The C refers to a desk phone jack, such as RJ-11C, while RJ-11W means a wall-mounted jack. See modular connector.


RJ-11 Connectors
Four-wire RJ-11 connectors (6P4C) are commonly used for telephone handsets and wall outlets. The six-wire variation (6P6C) is used for three telephone lines (see below).






Jack Positions (P)RJ     U.S.                 andType   Wire Pair Colors    Contacts (C)

  RJ-11  Line 1 - red-green     6P2C

  RJ-14  Line 1 - red-green     6P4C
         Line 2 - yellow-black

  RJ-25  Line 1 - red-green     6P6C
         Line 2 - yellow-black
         Line 3 - blue-white
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
There are two ways: 1.) hook transmitter and output device to slave modular jacks and run extensions (four-lead phone cord with RJ-11 plugs at both ends) to the phone line; or 2.) solder the transmitter and output wire directly to a length of phone line with an RJ-11 plug at the end, and run that to plug into the nearest modular jack on the phone line.
But the other end splits into eight "arms" of the octopus, each one of which terminates using an RJ-11 type connector.
The AR-7211A/B ADSL router features an RJ-11 WAN port for the ADSL connection and an RJ-45 Ethernet LAN port for a wired connection with other network devices.
The new offering integrates a VoIP analog telephone adapter (ATA) and a wireless gateway in a single device, packaged with an AC adapter and RJ-11, RJ-45 and USB cables.
In addition, the device offers voice-testing resources, such as detection of RJ-11 (1, 2 or 3 pair), and the ability to automatically sense and adjust the pairing and pin numbers to the 3-pair USOC standard in cable test, length and tone-generator modes.
I chose to have my wires pass through a small hole drilled in the side of the control box and end with a standard RJ-11 modular connector.
A third version is available for use with GL's Analog Test Set which provides a pair of analog two-wire interfaces (RJ-11) and optional 4-wire cellular phone interfaces for assessing voice quality on analog and wireless systems.
If you do wind up in a one-horse town where they bed the horse right in the hotel, or are traveling abroad, take a phone cord with an RJ-11 connector on one end and four colored wires with under-screw connectors on the other.
The PC CommLink, which is available now for about $10 in retail stores, is said to provide a solution to RJ-11 cable requirements for fax/modern needs.