RJ11 -> RJ45 - All about

an RJ11 to RJ45 adapter
an RJ11 to RJ45 adapter

RJ11 ⇔ RJ45



The telephone cable that arrives at the subscriber's home is called RJ11
RJ11
RJ11 - Registered Jack 11 - is used for the landline telephone. It is an international standard that is used to connect the landline telephone to the Telecommunications network.
RJ11 uses a 6-slot connector. In it RJ11 has 6 slots (positions) and two conductors, the standard is written 6P2C. The information transmitted on the line can be digital (DSL) or analog. The telephone cable that arrives at the subscriber h
, Registered Jack 11, it has 4 conductors grouped into 2 colored pairs. The socket consists of 6 physical positions and 4 electrical contacts of which only 2 are used (6P2C).
These two central contacts are used for the telephone line.

RJ45
RJ45
RJ45 - Registered Jack - is the wired standard that allows the network connection for example to the Internet via a box. This type of cable has 8 pins of electrical connections.
This cable is also called cable ETHERNET its connector is called 8P8C connector (8 positions and 8 electrical contacts). This connector is physically compatible with the connector RJ11 if an adapter is used. On computer cabling RJ45 in 10/10
Registered Jack 45 has 8 positions and 8 electrical contacts (8P8C), this connector is commonly used for Ethernet connections, i.e. networks, especially to connect computers to the Internet.
The right RJ45
RJ45
RJ45 - Registered Jack - is the wired standard that allows the network connection for example to the Internet via a box. This type of cable has 8 pins of electrical connections.
This cable is also called cable ETHERNET its connector is called 8P8C connector (8 positions and 8 electrical contacts). This connector is physically compatible with the connector RJ11 if an adapter is used. On computer cabling RJ45 in 10/10
cable is used to connect a computer to a Hub or Switch. The cross-wire RJ45
RJ45
RJ45 - Registered Jack - is the wired standard that allows the network connection for example to the Internet via a box. This type of cable has 8 pins of electrical connections.
This cable is also called cable ETHERNET its connector is called 8P8C connector (8 positions and 8 electrical contacts). This connector is physically compatible with the connector RJ11 if an adapter is used. On computer cabling RJ45 in 10/10
cable is usually used to connect two Hubs or two Switches or two computers.
wiring RJ11 to RJ45
wiring RJ11 to RJ45

Compatibility between RJ11 and RJ45

All strands of RJ-type cables go in pairs and are twisted together along the entire length of the sheath, this technique is used to improve signal quality.

Most wired Ethernet network communications are routed on a Category 5 or Category 6 RJ45
RJ45
RJ45 - Registered Jack - is the wired standard that allows the network connection for example to the Internet via a box. This type of cable has 8 pins of electrical connections.
This cable is also called cable ETHERNET its connector is called 8P8C connector (8 positions and 8 electrical contacts). This connector is physically compatible with the connector RJ11 if an adapter is used. On computer cabling RJ45 in 10/10
cable with a modular 8P8C plug at each end.
The RJ11
RJ11
RJ11 - Registered Jack 11 - is used for the landline telephone. It is an international standard that is used to connect the landline telephone to the Telecommunications network.
RJ11 uses a 6-slot connector. In it RJ11 has 6 slots (positions) and two conductors, the standard is written 6P2C. The information transmitted on the line can be digital (DSL) or analog. The telephone cable that arrives at the subscriber h
telephone cable that arrives at the subscriber has 4 contactors in a modular 6P2C card. Only the two central contactors are used for the line.

Warning : mechanically the male RJ11
RJ11
RJ11 - Registered Jack 11 - is used for the landline telephone. It is an international standard that is used to connect the landline telephone to the Telecommunications network.
RJ11 uses a 6-slot connector. In it RJ11 has 6 slots (positions) and two conductors, the standard is written 6P2C. The information transmitted on the line can be digital (DSL) or analog. The telephone cable that arrives at the subscriber h
connector does not fit into the female RJ45
RJ45
RJ45 - Registered Jack - is the wired standard that allows the network connection for example to the Internet via a box. This type of cable has 8 pins of electrical connections.
This cable is also called cable ETHERNET its connector is called 8P8C connector (8 positions and 8 electrical contacts). This connector is physically compatible with the connector RJ11 if an adapter is used. On computer cabling RJ45 in 10/10
connector because of the thick right and left edges.

The RJ45 connector has 8 positions :

position Twisted pair color twisted pair no.
1
I_____I
████
3
2
████
3
3
I_____I
████
2
4
████
1
5
I_____I
████
1
6
████
2
7
I_____I
████
4
8
████
4

The RJ11 connector has 6 positions :

position R/T Twisted pair color twisted pair no.
1 T
I_____I
████
3
2 T
I_____I
████
2
3 R
████
1
4 T
I_____I
████
1
5 R
████
2
6 R
████
3

wiring RJ45 to RJ11
wiring RJ45 to RJ11

Connection RJ11 to RJ45

To connect these two elements we use an adapter that requires no power and guarantees physical and electrical compatibility. These adapters are easily found on the internet and are cheap. You can also make this type of adapter yourself.

On the RJ11
RJ11
RJ11 - Registered Jack 11 - is used for the landline telephone. It is an international standard that is used to connect the landline telephone to the Telecommunications network.
RJ11 uses a 6-slot connector. In it RJ11 has 6 slots (positions) and two conductors, the standard is written 6P2C. The information transmitted on the line can be digital (DSL) or analog. The telephone cable that arrives at the subscriber h
socket, the two contacts of the center, numbered 2 and 3, are used as a telephone line, they correspond to the twisted pair 1 of blue and white/blue color.

On an RJ45
RJ45
RJ45 - Registered Jack - is the wired standard that allows the network connection for example to the Internet via a box. This type of cable has 8 pins of electrical connections.
This cable is also called cable ETHERNET its connector is called 8P8C connector (8 positions and 8 electrical contacts). This connector is physically compatible with the connector RJ11 if an adapter is used. On computer cabling RJ45 in 10/10
socket, during a 10/100 Mbps computer wiring, only the four 1-2 and 3-6 pins are used to transmit the information. During a computer wiring in 1000 Mbps, the 8 pins are used
For the telephone connection it is the two contacts of the center, numbered 4 and 5 of the twisted pair 1, blue and white/blue, of the RJ45
RJ45
RJ45 - Registered Jack - is the wired standard that allows the network connection for example to the Internet via a box. This type of cable has 8 pins of electrical connections.
This cable is also called cable ETHERNET its connector is called 8P8C connector (8 positions and 8 electrical contacts). This connector is physically compatible with the connector RJ11 if an adapter is used. On computer cabling RJ45 in 10/10
that serve.

Electrical adaptation between RJ11 and RJ45

Position RJ45 Position RJ11 Twisted pair number RJ11 N° for wiring to RJ45 Twisted pair number RJ45
1 3
2 1 3 3
3 2 2 7 2
4 3 1 4 1
5 4 1 5 1
6 5 2 8 2
7 6 3 4
8 4

wiring RJ45 to T or gigogne
wiring RJ45 to T or gigogne

Adapter DIY

It is possible to make your own adapter RJ11 RJ45 as shown in this video Youtube.



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