RJ48

RJ48 is a registered jack. It is used for T1 and ISDN termination and local area data channels/subrate digital services. It uses the 8 position modular connector.

RJ48C and RJ48X Wiring
Pin Pair Signal
1RRX Ring
2TRX Tip
3reserved
4R1TX Ring
5T1TX Tip
6reserved
7shield
8shield


RJ48C is commonly used for T1 lines and uses pins 1, 2, 4 and 5.

RJ48X is a variation of RJ48C that contains shorting blocks in the jack so that a loopback is created for troubleshooting when unplugged by connecting pins 1 and 4, and 2 and 5.

RJ48S is typically used for local area data channels/subrate digital services, and carries one or two lines. It uses a keyed variety of the 8P8C modular connector.

RJ48 connectors are fastened to STP (Shielded Twisted Pair) cables, not the standard UTP (Unshielded Twisted Pair) CAT-(1-5).

Naming confusion

People sometimes refer to the 10P10C modular connector as "RJ48." The origin of this misnomer is unknown; none of the RJ48 registered jacks use a 10P10C connector. However, it may be an outgrowth of the common misperception of the "RJ" USOCs as names of physical connectors. If one knew of the names RJ45 and RJ48 and knew of the 8P8C and 10P10C modular connectors, and believed (as explained in the RJ45 article) that RJ45 is the name of the 8P8C, one might conclude that RJ48 is the name of the larger 10P10C.

External links

A registered jack (RJ) is a standardized physical interface for connecting telecommunications equipment (commonly, a telephone jack) or computer networking equipment. The standard designs for these connectors and their wiring are named RJ11, RJ14, RJ45, etc.
..... Click the link for more information.


Digital signal 1 (DS1, also known as T1, sometimes "DS-1") is a T-carrier signaling scheme devised by Bell Labs.
..... Click the link for more information.
Modular connector is the name given to a family of electrical connectors examples of which are pictured. These connectors were originally used in telephone wiring. Even though they are still used for that purpose they are used for a variety of other things as well.
..... Click the link for more information.


Digital signal 1 (DS1, also known as T1, sometimes "DS-1") is a T-carrier signaling scheme devised by Bell Labs.
..... Click the link for more information.
Modular connector is the name given to a family of electrical connectors examples of which are pictured. These connectors were originally used in telephone wiring. Even though they are still used for that purpose they are used for a variety of other things as well.
..... Click the link for more information.
Modular connector is the name given to a family of electrical connectors examples of which are pictured. These connectors were originally used in telephone wiring. Even though they are still used for that purpose they are used for a variety of other things as well.
..... Click the link for more information.
A registered jack (RJ) is a standardized physical interface for connecting telecommunications equipment (commonly, a telephone jack) or computer networking equipment. The standard designs for these connectors and their wiring are named RJ11, RJ14, RJ45, etc.
..... Click the link for more information.
floodwire is a chiefly British term for installing communications cables in a massive fashion in anticipation of their eventual use.

677

References

  • ANSI/TIA-968-A: [https://www.part68.org/SecureDocuments/TIA-968-A-Final.

..... Click the link for more information.
A registered jack (RJ) is a standardized physical interface for connecting telecommunications equipment (commonly, a telephone jack) or computer networking equipment. The standard designs for these connectors and their wiring are named RJ11, RJ14, RJ45, etc.
..... Click the link for more information.
A registered jack (RJ) is a standardized physical interface for connecting telecommunications equipment (commonly, a telephone jack) or computer networking equipment. The standard designs for these connectors and their wiring are named RJ11, RJ14, RJ45, etc.
..... Click the link for more information.
RJ11 is a physical interface often used for terminating telephone wires. It is probably the most familiar of the registered jacks, being used for single line POTS telephone jacks in most homes and offices in North America and many other countries.
..... Click the link for more information.
RJ11 is a physical interface often used for terminating telephone wires. It is probably the most familiar of the registered jacks, being used for single line POTS telephone jacks in most homes and offices in North America and many other countries.
..... Click the link for more information.
RJ11 is a physical interface often used for terminating telephone wires. It is probably the most familiar of the registered jacks, being used for single line POTS telephone jacks in most homes and offices in North America and many other countries.
..... Click the link for more information.
RJ-21 (or RJ21) is a registered jack standard for a modular connector using 50 conductors, usually used to implement a 25-line (or less) telephone connection. It is also known as a 50-pin telco connector, or an Amphenol connector.
..... Click the link for more information.
RJ11 is a physical interface often used for terminating telephone wires. It is probably the most familiar of the registered jacks, being used for single line POTS telephone jacks in most homes and offices in North America and many other countries.
..... Click the link for more information.
floodwire is a chiefly British term for installing communications cables in a massive fashion in anticipation of their eventual use.

677

References

  • ANSI/TIA-968-A: [https://www.part68.org/SecureDocuments/TIA-968-A-Final.

..... Click the link for more information.
RJ61 (Registered Jack 61) is a physical interface often used for terminating twisted pair type cables. It is one of the Registered Jacks, and uses an eight position, eight conductor (8P8C) modular connector.
..... Click the link for more information.


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