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Text of the page (random words):
f the cable being terminated the crimper may also permanently deform part of the plastic plug body in such a way that it grips the outer sheath of the cable for secure fastening and strain relief these actions permanently attach the plug to the cable pinout edit the contact assignments pinout of modular connectors vary by application telephone network connections are standardized by registered jack designations and ethernet over twisted pair is specified by the ansi tia 568 standard for other applications standardization may be lacking for example multiple conventions exist for the use of 8p8c connectors in rs 232 applications for this reason d sub to modular adapters are typically shipped with the d sub contacts pins or sockets terminated but not inserted into the connector body so that the d sub to modular contact pairing can be assigned as needed 4p4c edit 4p4c modular connector on a handset cord wired telephone that uses 4p4c connectors for the coiled handset cord the four position four conductor 4p4c connector is the standard modular connector used on both ends of telephone handset cords and is therefore often called a handset connector 10 this handset connector is not a registered jack because it was not intended to connect directly to telephone lines however it is often referred to as rj9 rj10 or rj22 handset wiring edit handsets and often headsets for use with telephones commonly use a 4p4c connector the two center pins are commonly used for the receiver and the outer pins connect the transmitter so that a reversal of conductors between the ends of a cord does not affect the signal routing this may differ for other equipment including hands free headsets data port edit the macintosh 128k macintosh 512k and macintosh plus from apple as well as the amiga 1000 from commodore used 4p4c connectors to connect the keyboard to the main computer housing the connector provided power to the keyboard on the outer two contacts and received data signals on the inner pair the cable between the computer and the keyboard was a coiled cord with an appearance very similar to a telephone handset cable 11 the connector on the amiga 1000 used crossover wiring similar to a telephone handset the connector wiring on the apple computers however required a polarized straight through pinout using a telephone handset cable instead of the supplied cable could short out the 5 volt dc supply and damage the apple computer or the keyboard 12 modular connectors are often used for data links such as serial line connections because of their compact dimensions for example some directv set top boxes include a 4p4c data port connector with an adapter cord to a computer serial port so that remote control is possible from the computer 13 6p6c edit 6p4c crimp on style connector modular plugs are described by the maximum number of physical contact positions and the actual number of contacts installed in these positions the 6p2c 6p4c and 6p6c modular connectors are probably best known for their use as rj11 rj14 and rj25 registered jacks respectively these interfaces use the same six position modular connector body but have different numbers of pins installed rj11 is a physical interface often used for terminating single telephone lines rj14 is similar but for two lines and rj25 is for three lines rj61 is a similar registered jack for four lines but uses an 8p8c connector rj11 wiring edit cables sold as rj11 often actually use 6p4c connectors six positions four contacts and rj14 wiring four wires running to a central junction box two of its six possible contact positions connect tip and ring and the other two contact positions may be unused or provide low voltage power for night light or other features on the telephone set in some installations an extra contact was also required for the ground connection for selective ringers pinout edit the pins of the 6p6c connector are numbered 1 to 6 counting left to right when holding the connector tab side down with the opening for the cable facing the viewer position pair t r rj11 rj14 rj25 twisted pair colors 25 pair colors old colors a german colors b australian colors diagram 1 3 t t3 white green white green white pink orange 6p6c connector showing the location of pin 1 2 2 t t2 t2 white orange white orange black green red 3 1 r r1 r1 r1 blue blue white red white blue 4 1 t t1 t1 t1 white blue white blue green brown white 5 2 r r2 r2 orange orange white yellow yellow black 6 3 r r3 green green white blue gray green while the old solid color code was well established for pair 1 and usually pair 2 there are several conflicting conventions for pair 3 and sometimes even pair 2 the colors shown above were taken from a vendor of silver satin flat 8 conductor phone cable that claims to be standard 6 pair solid old bellwire cables previously used by the bell system use white for pair 3 tip but some vendors 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 citation needed this color scheme originates in the withdrawn national standard din 47100 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 6p4c plugs and sockets are typically only used to connect the telephone cord to the phone base unit whereas the mechanically different tae connector is used at the other end to connect to a service provider interface older base units may accommodate the additional connectors of tae e w a2 b2 and may feature non rj standard sockets that can be connected directly to tae plugs further flat din 47100 cables typically place the wires in ascending order when used directly with 6p4c plugs the color coding may be undetermined powered version of rj11 edit in the powered version of the rj11 interface pins 2 and 5 black and yellow may carry low voltage ac or dc power while the telephone line on pins 3 and 4 red and green supplies enough power for most telephone terminals old telephone terminals with incandescent lights such as the western electric princess and trimline telephones need more power than the phone line can supply typically the power on pins 2 and 5 is supplied by an ac adapter plugged into a nearby power outlet which potentially even supplies power to all of the jacks in the house compatibility with structured cabling edit structured cabling networks adhering to ansi tia 568 iso iec 11801 or iso iec 15018 for home networks are widely used for both computer networking and analog telephony these standards specify the t568a or t568b wiring arrangements compatible with ethernet the 8p8c jack used by structured cabling physically accepts the 6 position connector used by rj11 rj14 and rj25 only rj11 and rj14 have full electrical compatibility because ethernet compatible pin outs split the third pair of rj25 across two separate cable pairs rendering that pair unusable by an analog phone both the third and fourth pairs of rj61 are similarly split the incompatible t568a and t568b layouts were necessary to preserve the electrical properties of the third and fourth pairs for ethernet which operates at much higher frequencies than analog telephony because of these incompatibilities and because rj25 and rj61 were never very common the t568a and t568b conventions have largely displaced rj25 and rj61 for telephones with more than two lines 8p8c edit an 8p8c modular plug not yet crimped onto a cable an 8p8c modular connector with a rj45s key cut the 8 position 8 contact 8p8c connector is a modular connector commonly used to terminate twisted pair and multi conductor flat cable these connectors are commonly used for ethernet over twisted pair registered jacks and other telephone applications rs 232 serial communication using the ansi tia 568 formerly tia eia 568 and yost standards and other applications involving unshielded twisted pair shielded twisted pair and multi conductor flat cable an 8p8c modular connection consists of a male plug and a female jack each with eight equally spaced contacts on the plug the contacts are flat metal bars positioned parallel to the connector body inside the jack the contacts are metal spring wires angled away from the insertion interface when the plug is mated with the jack the contacts meet and create an electrical connection the spring tension of the jack contacts ensures a good interface left generic 8p8c or 8pmj 8 position modular jack male connector right rj45 male connector with key although commonly referred to as rj45 in the context of ethernet and category 5 cables rj45 originally referred to a specific wiring configuration of an 8p8c connector 14 15 16 the original telephone system standard rj45 plug has a key which excludes insertion in an un keyed 8p8c socket 17 the original rj45s a was intended for high speed modems and is obsolete the rj45s jack mates with a keyed 8p2c modular plug 18 19 and has pins 4 and 5 the middle positions wired for the ring and tip conductors of a single telephone line and pins 7 and 8 shorting a programming resistor this is a different mechanical interface and wiring scheme than ansi tia 568 t568a and t568b schemes with the 8p8c connector in ethernet and telephone applications generic 8p8c modular connectors are similar to those used for the rj45s variant although the rj45s plug is keyed and not compatible with non keyed 8p8c modular jacks telephone installers who wired rj45s modem jacks or rj61x telephone jacks were familiar with the pin assignments of the standard however the standard un keyed modular connectors became ubiquitous for computer networking and informally inherited the name rj45 standardization edit the shape and dimensions of an 8p8c modular connector are specified for us telephone applications by the administrative council for terminal attachment acta in national standard ansi tia 1096 a and international standard iso 8877 this standard does not use the short term 8p8c and covers more than just 8p8c modular connectors but the 8p8c modular connector type is the eight position connector type described therein with eight contacts installed for data communication applications lan structured cabling international standard iec 60603 specifies in parts 7 1 7 2 7 4 7 5 and 7 7 not only the same physical dimensions but also high frequency performance requirements for shielded and unshielded versions of this connector for carrying frequencies up to 100 250 and 600 mhz pinout edit t568a wiring defined in tia 568 t568b wiring defined in tia 568 8p8c connectors are frequently terminated using the t568a or t568b assignments that are defined in ansi tia 568 the drawings to the right show that the copper connections and pairing are the same the only difference is that the orange and green pairs colors are swapped a cable wired as t568a at one end and wired as t568b at the other end tx and rx pairs reversed is an ethernet crossover cable before the widespread acceptance of auto mdi x capabilities a crossover cable was needed to interconnect similar network equipment such as ethernet hubs to ethernet hubs crossover cables are sometimes still used to connect two computers together without a switch or hub however most network interface cards nic in use today implement auto mdi x to automatically configure themselves based on the type of cable plugged into them a cable wired the same at both ends is called a patch or straight through cable because no pin pair assignments are swapped if a patch or straight cable is used to connect two computers with auto mdi x capable nics one nic will configure itself to swap the functions of its tx and rx wire pairs pin t568a pair t568a color t568b pair t568b color 10base t 100base tx signal 20 1000base t 10gbase t signal wire diagram 1 3 white green stripe 2 white orange stripe td da tip pin numbering on plug connected pins on plug and jack have the same number 2 3 green solid 2 orange solid td da ring 3 2 white orange stripe 3 white green stripe rd db tip 4 1 blue solid 1 blue solid nc dc ring 5 1 white blue stripe 1 white blue stripe nc dc tip 6 2 orange solid 3 green solid rd db ring 7 4 white brown stripe 4 white brown stripe nc dd tip 8 4 brown solid 4 brown solid nc dd ring types and compatibility edit two types of 8p8c plugs and crimping tools for installing the plug onto a cable are commonly available western electric stewart stamping we ss and tyco amp while the two types are similar the tooling and plug types cannot be interchanged b we ss compatible plugs are available from a large number of manufacturers whereas tyco amp plugs are produced exclusively by tyco electronics citation needed both types of modular plugs can be mated with a standard 8p8c modular jack both types of 8p8c plugs are available in shielded and unshielded varieties for different attenuation tolerances as needed shielded plugs are more expensive and require shielded cable but have a lower attenuation and may reduce electromagnetic interference although a narrower 4 pin and 6 pin plug fits into the wider 8 pin jack and makes a connection with the available contacts on the plug because the body of the smaller connector may stress the remaining contacts c the smaller connector can potentially damage the springs of the larger jack applications edit 8p8c connectors are commonly used in computer networking applications where interconnecting cables are terminated at each end with an 8p8c modular plug wired according to tia eia standards most wired ethernet communications are carried over category 5e or category 6 cable terminated with 8p8c modular plugs the connector is also used in other telecommunications connections including isdn and t1 where building network and telephone wiring is pre installed the center blue pair is often used to carry telephony signals while this allows an rj11 plug to connect it may damage the modular jack an approved converter prevents damage in landline telephony an 8p8c jack is used at the point a line enters the building to allow the line to be broken to insert automatic dialing equipment including intrusion alarm panels the eia tia 561 standard describes the use of 8p8c connectors for rs 232 serial interfaces 23 this application is common as a console interface for network equipment such as switches routers and headless computers 8p8c modular connectors are also commonly used as a microphone connector for pmr lmr and amateur radio transceivers frequently the pinout is different usually mirrored i e what would be pins 1 to 8 in the ansi tia 568 standard might be pins 8 to 1 in the radio and its manual in analog mobile telephony the 8p8c connector was used to connect an amps cellular handset to its separate base unit this usage is now obsolete the physical connector is standardized as the iec 60603 7 8p8c modular connector with different categories of performance the physical dimensions o...
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