RJ22 Connector
The 4-position, 4-conductor (4P4C) modular connection often used to connect a telephone handset’s coiled cable to the base unit of the phone is referred to as “RJ22 Connector” in particular. Of all the typical “RJ” plugs, it is the smallest.
As a Modular Connector (Most Common Usage)
RJ22 Connector Definition and Purpose
- The four positions of an RJ22 Connector connection are all used as active contacts, making it a 4P4C connector.
- Its only function is to link the base of a telephone to its handset. It is made especially for the little cord that runs through a phone.
- It is not utilized for connecting the phone to a wall jack or for direct phone line connections.
RJ22 Connector Key Features
- Size: It is characterized as the shortest and thinnest of the typical RJ connections, which also include RJ12, RJ45, and RJ11.
- Design: For clear audio transmission, it usually contains gold-plated connections and a tiny, translucent plastic housing.
- Cords: It is typically utilised with telephone cords that are coiled, or curly.
- Pin Configuration: Pin 1 is for the microphone, Pin 2 is for ground, Pin 3 is for ground, and Pin 4 is for speaker/earpiece audio. This is the standard pin arrangement. But each manufacturer may have different wiring.
RJ22 Connector Applications
- Cords for telephone handsets.
- Plugs for modular headsets.
- Certain communication equipment need small connections.
Informal Designation: Despite being frequently used, “RJ22 Connector” is an unofficial word and does not correspond to an actual FCC “Registered Jack” identification. For the same 4P4C connection, other colloquial designations such as RJ9 and RJ10 are occasionally used interchangeably.
RJ48
A telecommunication cable connector known as RJ-48 (Registered Jack 48) is identical to an RJ-45 connector in terms of its physical dimensions and 8-pin (8P8C) modular socket. Even though they seem the same, the RJ-48 and RJ-45 have quite distinct functions and internal wiring (pinout).
The following are the RJ-48 connector’s main features:
RJ48 Definition and Purpose
- Wide Area Network (WAN) connections, including T1, E1, and ISDN (Integrated Services Digital Network) lines, are the main applications for the RJ-48 connector standard. It is not intended for use with conventional Ethernet networking.
- It is a standard established by the registered jack (RJ) system, which outlines electrical and physical requirements for connecting telecom devices.
RJ48 Physical Characteristics
- It is an 8-position, 8-contact (8P8C) modular connector, meaning it has eight pins, just like an RJ-45.
- It is technically possible for an RJ-48 connection to fit into the same jack as an RJ-45.
RJ48 Applications
Service Provider Connections: In order to connect to a CSU/DSU (Channel Service Unit/Data Service Unit), service providers usually employ RJ-48 connections on cables that enter an organization’s wire closet.
Router Serial Ports: A router’s serial port may include an RJ-48 port for connecting the serial cable if it has an inbuilt CSU/DSU, which sets it apart from Ethernet LAN interfaces that utilise RJ-45. While serial WAN ports may utilise RJ-48 for CSU/DSU connections, router Ethernet interfaces usually use RJ-45 for LAN switches.
High-Speed Digital Lines: T1 and ISDN lines are digital telecommunications circuits made especially for dependable long-distance voice and data transfer in business settings and older wide area networks.
WAN Links: It joins businesses and telecom networks together as well as WAN links in telecom systems.
Local-area data channels, ISDN PRI lines, E1 leased lines, subrate digital services, and occasionally PBX systems are further uses.
You can also read Differences Between Cables And Connectors In Networking
Pinout and Wiring (Key Difference from RJ-45)
- Most importantly, RJ-48 and RJ-45 vary in their pinouts. RJ-48 connection wiring differs from RJ-45 Ethernet cable wiring, which follows the T568A and T568B standards.
- Usually utilised for T1 circuits, RJ48C is the most widely utilised kind. Of the eight pins, four are used for data transmission (two for transmitting and two for receiving).
In contrast to Ethernet connections’ straightforward transmit/receive pairing, the RJ48 pinout is unique to its telecommunications use. For T1 circuits, the RJ48C is the most often used variant. Usually, two of the eight pins are used for sending and two for receiving data, leaving four pins available for data transfer.
RJ48C Pinout
- Pin 1: Transmit Ring
- Pin 2: Transmit Tip
- Pin 4: Receive Ring
- Pin 5: Receive Tip
- Pins 3, 6, 7, 8: Unused or used for shielding and ground.
RJ48X, which contains shorting blocks in the jack for diagnosing loopbacks, and RJ48S, which supports 56 kbps digital services, are two further versions. RJ48 is used with shielded cables in professional settings and has a unique pinout, therefore trying to use it for Ethernet might result in damaged equipment or no connectivity.
Cable Type
STP cables are commonly used with RJ-48 to provide noise protection, particularly in professional environments.
Consequences of Misuse
Due to its unique pinout and specific function, trying to utilise an RJ-48 for Ethernet may result in equipment damage or perhaps no connectivity.
In simple words: RJ48 plugs resemble RJ45 plugs, however they are configured for telecom lines (T1/E1/ISDN) rather than Ethernet.
RJ50
Modular connectors that use a 10-position, 10-contact (10P10C) plug are called RJ50s. Although the industry often uses the name “RJ50” to refer to a 10-conductor connection, it is not a recognised “Registered Jack” standard like RJ45 or RJ11.
You can also read What is RJ 11 Connectors, Key Features, and Advantages
RJ50 Key Features
Design and Size: An RJ50 connection is physically comparable to an RJ45 connector, however it has two more pins since it is a little bigger. It has gold-plated contacts on a clear modular plastic plug for dependable communication.
Pin Configuration: Ten pins are provided, numbered 1 through 10, and they can be utilised for control, power, or data signals. The manufacturer determines the precise pin assignments for RJ50 connections; unlike some other connectors, there is no global wiring standard.
Conductors: An RJ50 can transport more signals than an RJ45 because it has more conductors (10 vs. 8). This is its main benefit.
Cable Type: Twisted pair cables that are shielded or unshielded can be connected to RJ50 connectors.
Power and Data: By using the additional pins to transmit power in addition to data, a device can employ fewer cords.
RJ50 Applications
RJ50 connections are mostly used in specialist, proprietary, or industrial applications that need more than eight wires or a single data stream, as provided by an RJ45. Usually, they are absent from conventional networking configurations.
RJ50 Common uses include
- Systems for industrial control and automation.
- Point-of-sale (POS) systems and equipment for data acquisition.
- Specialised equipment, including sensors, diagnostic tools, and other computer add-ons that require additional pins.
- Scanners for barcodes, especially those made by companies like Symbol, Motorola, and Zebra.
- Data terminals and equipment for private communication.
- Some network devices need additional pins.
You can also read Registered Jack 45: The Standard Ethernet Connector