A registered jack (RJ) is a standardized physical interface — both jack construction and wiring pattern — for connecting telecommunications equipment (commonly, a telephone jack) or computer networking equipment to a service provided by a local exchange carrier or, sometimes, a long distance carrier. The standard designs for these connectors and their wiring are named RJ11, RJ14, RJ45, etc. These interface standards are most commonly used in North America, though some interfaces are used world-wide[citation needed].
The physical connectors that registered jacks use are of the modular connector type, except RJ21X which is a 25-pair Amphenol connector. For example, RJ11 uses a 6 pin 4 conductor (6P4C) modular plug and jack.
Contents
[hide]- 1 Naming confusion
- 2 Twisted pair
- 3 History and authority
- 4 International use
- 5 Registered jack types
- 6 External links
Internet Portal
The Internet is a worldwide, publicly accessible series of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol (IP). It is a "network of networks" that consists of millions of smaller domestic, academic, business, and government networks, which together carry various information and services, such as electronic mail, online chat, file transfer, and the interlinked web pages and other resources of the World Wide Web (WWW).
Contents[hide]
1 Terminology
2 History
2.1 Creation
2.2 Growth
2.3 University students' appreciation and contributions
3 Today's Internet
3.1 Internet protocols
3.2 Internet structure
3.3 ICANN
3.4 Language
3.5 Internet and the workplace
3.6 The Internet viewed on mobile devices
4 Common uses of the Internet
4.1 E-mail
4.2 The World Wide Web
4.3 Remote access
4.4 Collaboration
4.5 File sharing
4.6 Streaming media
4.7 Voice telephony (VoIP)
5 Internet by region
6 Internet access
7 Social impact
7.1 Political organization and censorship
7.2 Leisure activites
8 Complex architecture
9 Marketing
10 The terms internet and Internet
11 See also
11.1 Major aspects and issues
11.2 Functions
11.3 Underlying infrastructure
11.4 Regulatory bodies
12 Notes
13 References