RJ-45 (Registered Jack - Type 45) is a Electrical connector often used for terminating twisted pair type cables. "RJ" stands for Registered jack which is part of the United States Code of Federal Regulations. It has eight "pins" or electrical connections. It is usually used with standards like TIA-568B which define the wiring pinout: {| border="1" |+ RJ-45 Wiring (EIA/TIA-568B) ! Pin !! Pair !! Wire !! Color |- | 1 || 2 || 1 | white/orange |- | 2 || 2 || 2 | orange |- | 3 || 3 || 1 | white/green |- | 4 || 1 || 2 | blue |- | 5 || 1 || 1 | white/blue |- | 6 || 3 || 2 | green |- | 7 || 4 || 1 | white/brown |- | 8 || 4 || 2 | brown |} The original concept (RJ-11, RJ-14, RJ-25, RJ-48, RJ-61) was that the central two pins would be one pair, the next two out the second pair, and so on until the outer pins of an eight-pin connector would be the fourth twisted pair. Additionally, signal shielding was optimised by alternating the "live" and "earthy" pins of each pair. This pattern for the eight-pin connector results in a pinout where the outermost pair are then too far apart to meet the electrical requirements of high-speed LAN protocols. Two commonly used standard pinouts known as TIA-568A and TIA-568B overcome this by using adjacent pairs on the outer four pins. TIA-568A and TIA-568B differ by swapping the locations of the green and orange pairs, and thus have identical perfomance characteristics. A given location will generally standardize on one of the two options for consistency. (See: Category 5 cable.) It is normally utilized in telephone sets, with 4 pins (2 pairs). A very common application is its use in Ethernet cables, where usually 8 pins (4 pairs) are used (i.e. a Gender_of_connectors_and_fasteners-to-male cable to connect a cable modem or ADSL modem to the computer Ethernet network card). Other applications include other computer network services such as Integrated Services Digital Network and t-carrier. See RJ-XX for other, similar looking jacks, with which the RJ-45 is likely (and often) confused. ==See also== *[http://www.maxstream.net/helpdesk/?_a=knowledgebase&_j=questiondetails&_i=38&PHPSESSID=3d0c24f32f042f97c6d6c57a3c4b8c50 RJ-45 to DB9 Conversion] *CAT 5 *CAT 6 *Cat_7 *computer network Computer networks Telephony
===TIA-568A and RJ-45 inconsistency=== Please see Talk:TIA-568A#TIA-568A and RJ-45 inconsistency. User:Rfl 07:34, 30 Jul 2004 (UTC) ===Question about RJ-11 and RJ-45=== * Does RJ-45 allow connections to the RJ-11 Landline Telephone network?== Which way? What do you mean? You can insert a telephone plug into an RJ-45 socket and if the 1st (white/blue) pair (two central pins) of RJ-45 socket is connected to a telephone line (which does not interfere with Ethernet which uses only the 2nd and 3rd pair), then your one-line phone will work just fine. Smaller plugs can be inserted into larger sockets. Is that what you ask for? User:Rfl 06:30, 3 Aug 2004 (UTC) ::I worked at a computer shop where they had a couple of their RJ-45 sockets wired up to the phone line, and then RJ-11 to RJ-45 adapters in them so you could just plug a phone cable into it, very convenient when you need to test a modem and the main phone socket's behind a heavy unit.
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Words begining with RJ-45:
RJ-45
RJ-45
RJ-45_Connector
RJ-45
RJ-45 (Registered Jack - Type 45) is a Electrical connector often used for terminating twisted pair type cables. "RJ" stands for Registered jack which is part of the United States Code of Federal Regulations. It has eight "pins" or electrical connections. It is usually used with standards like TIA-568B which define the wiring pinout: {| border="1" |+ RJ-45 Wiring (EIA/TIA-568B) ! Pin !! Pair !! Wire !! Color |- | 1 || 2 || 1 | white/orange |- | 2 || 2 || 2 | orange |- | 3 || 3 || 1 | white/green |- | 4 || 1 || 2 | blue |- | 5 || 1 || 1 | white/blue |- | 6 || 3 || 2 | green |- | 7 || 4 || 1 | white/brown |- | 8 || 4 || 2 | brown |} The original concept (RJ-11, RJ-14, RJ-25, RJ-48, RJ-61) was that the central two pins would be one pair, the next two out the second pair, and so on until the outer pins of an eight-pin connector would be the fourth twisted pair. Additionally, signal shielding was optimised by alternating the "live" and "earthy" pins of each pair. This pattern for the eight-pin connector results in a pinout where the outermost pair are then too far apart to meet the electrical requirements of high-speed LAN protocols. Two commonly used standard pinouts known as TIA-568A and TIA-568B overcome this by using adjacent pairs on the outer four pins. TIA-568A and TIA-568B differ by swapping the locations of the green and orange pairs, and thus have identical perfomance characteristics. A given location will generally standardize on one of the two options for consistency. (See: Category 5 cable.) It is normally utilized in telephone sets, with 4 pins (2 pairs). A very common application is its use in Ethernet cables, where usually 8 pins (4 pairs) are used (i.e. a Gender_of_connectors_and_fasteners-to-male cable to connect a cable modem or ADSL modem to the computer Ethernet network card). Other applications include other computer network services such as Integrated Services Digital Network and t-carrier. See RJ-XX for other, similar looking jacks, with which the RJ-45 is likely (and often) confused. ==See also== *[http://www.maxstream.net/helpdesk/?_a=knowledgebase&_j=questiondetails&_i=38&PHPSESSID=3d0c24f32f042f97c6d6c57a3c4b8c50 RJ-45 to DB9 Conversion] *CAT 5 *CAT 6 *Cat_7 *computer network Computer networks Telephony
RJ-45
===TIA-568A and RJ-45 inconsistency=== Please see Talk:TIA-568A#TIA-568A and RJ-45 inconsistency. User:Rfl 07:34, 30 Jul 2004 (UTC) ===Question about RJ-11 and RJ-45=== * Does RJ-45 allow connections to the RJ-11 Landline Telephone network?== Which way? What do you mean? You can insert a telephone plug into an RJ-45 socket and if the 1st (white/blue) pair (two central pins) of RJ-45 socket is connected to a telephone line (which does not interfere with Ethernet which uses only the 2nd and 3rd pair), then your one-line phone will work just fine. Smaller plugs can be inserted into larger sockets. Is that what you ask for? User:Rfl 06:30, 3 Aug 2004 (UTC) ::I worked at a computer shop where they had a couple of their RJ-45 sockets wired up to the phone line, and then RJ-11 to RJ-45 adapters in them so you could just plug a phone cable into it, very convenient when you need to test a modem and the main phone socket's behind a heavy unit.
See other meanings of words starting from letter:
R
RA | RB | RC | RD | RE | RF | RG | RH | RI | RJ | RK | RL | RM | RN | RO | RP | RS | RT | RU | RW | RX | RY | RZ |Words begining with RJ-45:
RJ-45
RJ-45
RJ-45_Connector
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