Registered jack - Wikipedia, the free encyclopedia. This article is about the registered jack (RJ) wiring standard. For other uses of modular connectors, see Modular connector.
Registration interfaces were first defined in the Universal Service Ordering Code (USOC) system of the Bell System in the United States for complying with the registration program for customer- supplied telephone equipment mandated by the Federal Communications Commission (FCC) in the 1. Accordingly, registered jacks are primarily named by the letters RJ, followed by two digits that express the type. Additionally, letter suffixes indicate minor variations. For example, RJ1. RJ1. 4, and RJ2. 5 are the most commonly used interfaces for telephone connections for one- , two- , and three- line service, respectively. Although these standards are legal definitions in the United States, some interfaces are used world- wide. The connectors used for registered jack installations are primarily the modular connector and the 5. For example, RJ1. P2. C), RJ1. 4 uses a six- position four- conductor (6. P4. C) modular jack, while RJ2. Naming standard. The same modular connector type may be used for different registered jack applications. Strictly, registered jack refers to both the female physical connector (modular connector) and its wiring, but the term is often used loosely to refer to modular connectors regardless of wiring or gender, such as in Ethernet over twisted pair. There is much confusion over these connection standards. Telco Female Patch Panel - RJ11 - 6P2C - 24 Port: Front Connection Type. What is the difference between RJ11, RJ12 and RJ45 connectors?RJ Patch Panel Modules & Accessories. Roline Cat5e RJ45 Patch Panel, UTP Shielding. Cat3 RJ11, USOC 6 Port Modular. Rj11 Rj45 Patch Panel, Wholesale Various High Quality Rj11 Rj45 Patch Panel Products from Global Rj11 Rj45 Patch Panel Suppliers and Rj11 Rj45 Patch Panel Factory. The same six- position plug and jack commonly used for telephone line connections may be used for RJ1. RJ1. 4 or even RJ2. The RJ1. 1 standard dictates a 2- wire connection, while RJ1. RJ2. 5 uses all six wires. The RJ abbreviations, though, only pertain to the wiring of the jack (hence the name registered jack); it is commonplace, but not strictly correct, to refer to an unwired plug connector by any of these names. Modular connectors were developed to replace older telephone installation methods that used either hardwired cords, or bulkier varieties of telephone plugs. The common nomenclature for modular connectors includes the number of contact positions and the number of wires connected, for example 6. P indicates a six- position modular plug or jack. A six- position modular plug with conductors in the middle two positions and the other four positions unused has the designation 6. P2. C. RJ1. 1 uses a 6. P2. C connector. The connectors could be supplied with more pins, but if more pins are actually wired, the interface is not an RJ1. History and authority. These interfaces used newly standardized jacks and plugs, primarily based on miniature modular connectors. The wired communications provider (telephone company) is responsible for delivery of services to a minimum (or main) point of entry (MPOE). The MPOE is a utility box, usually containing surge protective circuitry, which connects the wiring on the customer's property to the communication provider's network. Customers are responsible for all jacks, wiring, and equipment on their side of the MPOE. The intent was to establish a universal standard for wiring and interfaces, and to separate ownership of in- home (or in- office) telephone wiring from the wiring owned by the service provider. In the Bell System, following the Communications Act of 1. Telephones were generally hardwired, but may have been installed with Bell System connectors to permit portability. The legal case Hush- A- Phone v. United States (1. Federal Communications Commission's (FCC) Carterfone (1. Bell System to allow some interconnection, culminating in the development of registered interfaces using new types of miniature connectors. Registered jacks replaced the use of protective couplers provided exclusively by the telephone company. The new modular connectors were much smaller and cheaper to produce than the earlier, bulkier connectors that were used in the Bell System since the 1. The Bell System issued specifications for the modular connectors and their wiring as Universal Service Order Codes (USOC), which were the only standards at the time. USOCs are commonly specified to the communications provider by large businesses for a variety of services. Because there are many standardized interface options available to the customer, the customer must specify the type of interface required by RJ/USOC. For a multi- line interface such as the RJ2. If there are multiple RJ2. When the US telephone industry was opened to more competition in the 1. US law, ordered by the FCC and codified in the Code of Federal Regulations (CFR), Title 4. CFR Part 6. 8, Subpart F. The FCC removed Subpart F from the CFR and added Subpart G, which delegates the task to the ACTA. The ACTA generates its recommendations for terminal attachments from the standards published by the engineering committees of the Telecommunications Industry Association (TIA). ACTA and TIA jointly published a standard called TIA/EIA- IS- 9. With the publication of TIA- 9. B. This is a modular connector wired for one telephone line, using the center two contacts of six available positions, and is used for single- line telephones in homes and offices in most countries. RJ1. 4 is similar to RJ1. RJ2. 5 has three lines. RJ6. 1 is a similar registered jack for four lines. The RJ4. 5(S) jack is rarely used, but the designation RJ4. P8. C modular connector for application in computer networking (Ethernet). The officially recognized types of registered jacks are listed in the following table: Code. Connector. Usage. RJA1. X2. 25. A adapter. Connector for a modular plug to a four- prong jack. RJA2. X2. 67. A adapter. Connector for splitting one modular jack to two modular jacks. RJA3. X2. 24. A adapter. Connector for adapting a modular plug to a 1. RJ2. MB5. 0- pin micro ribbon. Jack is placed closer to the network interface than all other equipment. Only 4 conductors are used. RJ3. 2X8. P8. CLike RJ3. X, this wiring provides a series tip and ring connection through the connecting block, but is used when the customer premises equipment is connected in series with a single station, such as an automatic dialer. RJ3. 3X8. P8. CThis wiring provides a series tip and ring connection of a KTS line ahead of the line circuit because the registered equipment requires CO/PBX ringing and a bridged connection of the A and A1 lead from behind the line circuit. Tip and ring are the only leads opened when the CPE plug is inserted. Typical usage is for customer- provided automatic dialers and call restrictors. RJ3. 4X8. P8. CSimilar to RJ3. X, but all leads are connected behind the line circuit. RJ3. 5X8. P8. CThis arrangement provides a series tip and ring connection to whatever line has been selected in a key telephone set plus a bridged A and A1 lead. RJ3. 8X8. P4. CSimilar to RJ3. X, with a continuity circuit. If the plug is disconnected from the jack, shorting bars allow the phone circuit to continue to the site phones. Only 4 conductors are used. RJ4. 1S8. P8. C, keyed. For one data line, universal (fixed loop loss and programmed)RJ4. S8. P8. C, keyed. For one data line, with programming resistor. RJ4. 8C8. P4. CFor four- wire data line (DSX- 1)RJ4. S8. P4. C, keyed. For four- wire data line (DDS)RJ4. X8. P4. C with shorting bar. For four- wire data line (DS1)RJ4. C8. P8. CFor ISDN BRI via NT1. RJ6. 1X8. P8. CFor four telephone lines. RJ7. 1C5. 0- pin micro ribbon. Mostly used for call sequencer equipment. Many of the basic names have suffixes that indicate subtypes: C: flush- mount or surface mount. F: flex- mount. W: wall- mount. L: lamp- mount. S: single- line. M: multi- line. X: complex jack. For example, RJ1. RJ1. 1W is a jack from which a wall telephone can be hung, while RJ1. C is a jack designed to have a cord plugged into it. Since telephone handsets do not connect directly to the public network, they have no registered jack code. RJ4. 5: 8. P8. C, informal designation for T5. A/T5. 68. B, including Ethernet; not the same as the true RJ4. SRJ5. 0: 1. 0P1. 0C, often used for data. International use. In order to be considered, the connector system had to be defined under international standards. In turn this led to ISO 8. Under the rules of the IEEE 8. IEEE 8. 02. 3i- 1. BASE- T twisted- pair wiring version of Ethernet. RJ1. 1, RJ1. 4, RJ2. RJ1. 1, RJ1. 4, and RJ2. Cords connecting to an RJ1. P2. C connector. Nevertheless, cords sold as RJ1. P4. C connectors (six position, four conductor) with four wires. Two of the six possible contact positions connect tip and ring, and the other two conductors are unused. The conductors other than the two central tip and ring conductors are in practice variously used for a second or third telephone line, a ground for selective ringers, low- voltage power for a dial light, or for anti- tinkle circuitry to prevent pulse dialing phones from sounding the bell on other extensions. Pinouts. The colors shown above were taken from a vendor of . Bell System use white for pair 3 tip but some vendor's cable may substitute orange for white. At least one other vendor of flat 8- conductor cable uses the sequence blue, orange, black, red, green, yellow, brown and white/slate.^. The scheme shown here is the correct color code for interfacing with the RJ connector standards. However, with German domestic telephone equipment (and that in some neighboring countries), 6. P4. C plugs and sockets are typically only used to connect the telephone cable to the phone base unit, whereas the mechanically different TAE plug is used at the other end of the cable. Older base units may accommodate the additional connectors of TAE (E, W, a. RJ standard sockets that can be connected . Further, flat DIN 4. Provisioning of power. This power was delivered to the telephone set from a transformer by the second wire pair (pins 2 and 5) of the 6. P4. C connector. RJ2. A2 key telephone system. It is also known as a 5. CHAMP(AMP) or an Amphenol connector (the latter is a genericized trademark, as Amphenol was the largest manufacturer of these at one time).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
October 2016
Categories |