Question

Explain briefly the types of Jacks.

Answer 1

• RJ-11:

1. It is the most popular modern form of the registered jack.
2. It is found in the home and office.
3. This registered jack is mainly used in telephone and landlines.
4. There are 6 pins where
   1. The two pins give the transmission configuration,
   2. The two pins give the receiver configuration and
   3. The other two pins will be kept for reserved.
   4. The two-pin will have the positive terminal and the negative terminal.

• RJ-14 and RJ-61:

1. The RJ-14 is the same as RJ-11 which will be used for telephone lines where same it as 6 pins whereas the RJ-61 will have 8 pins.
2. This RJ-61 will use the twisted pair cable with a modular connection.

• RJ-21:

1. The RJ-21 connector has 50 pins with 25 pins at one end and 25 pins at the other end.
2. It is also called as champ connector or Amphenol connector.
3. The Amphenol is a connector manufacturer.
4. The RJ-21 interface is typically used for data communication trucking applications.