News Center

What are the differences between 2-core and 4-core telephone Cable ?

What are the differences between 2-core and 4-core telephone Cable  ?



1. What are the differences between two-core and four-core telephone Cable


1. The wire diameters of the two are different. If you choose a two-core telephone line, the diameter is 0.4 mm, if it is a 4-core phone line, it is 0.5 mm, and some can reach 1.0 mm.


2. The crystal heads of the two are also different. If you choose two-core, according to the standard connection method, you should choose RJ 32 crystal head. If it is four-core, it is generally used in the company or the group phone. The standard telephone crystal head you choose is best for MIC. .


3. The two use modes are different. Generally speaking, the two-core is an analog telephone signal, which is used for local calls. The four-core signal is a digital telephone signal. If you only need to make a phone call, you only need to choose two-core. If it is an office system, the four-core telephone line is generally selected for wiring.


4. The main reason is that the office may need to install an extension in addition to the open line. At the beginning, it was installed with two cores. If you want to connect it later, it will lead to more Cable in the office, which is very messy, so it was used as an office at the beginning. Wire telephone line, it is best to choose four-core twisted pair.


2. How does the network cable become a telephone line ?


1. First, you need to prepare a crimping tool, a network cable, and a phone crystal head. Use wire crimping pliers to cut off the outer insulating layer of one end of the network cable to expose the inner wire, and you can see that there are 8 network cables of different colors. When using, you only need to use four, and you need two telephone Cable, that is to say, two cores are enough.


2. Next, insert two of the wire cores, no matter what color, into the crystal head, and the other end should also be connected to the crystal head, and the colors should be the same. Then press it with a crimping pliers and connect it with the telephone line interface, you can turn the network cable into a telephone line


Premier Cable CO LTD,  is a cable factory with 400 workers to make cables and wire harness


We make a lot of RJ9 , RJ11, RJ12 , RJ45 Cables , RJ12 T-Splitter ,telephone cable,  headset cable 

Tel : 0086-0139-2949-7934        ,     Skype : james198585    ,      Email :       ,    Email :


Telephone RJ9 Extension Cable  


RJ9 4P4C Phone Extension Cable 


RJ9 4P4C Headset Extension Cable 


Telephone RJ9 4P4C Adapter Cable


RJ9 Headset Adapter Extension Cable


RJ9 4P4C Male To Female Connector 


RJ9 Headset Extension Cord Adapter 

4P4C RJ9 Female Telephone Cable Lead  

RJ9 4P4C Female  Extension Cable Adapter   


Telephone RJ9 4P4C Adapter CableRJ9 Headset Adapter Extension CableRJ9 Headset Extension Cord Adapter 4P4C RJ9 Female Telephone Cable Lead

Related News

USB FTDI Cable IP67 waterproof round connector manufacturers introduce the development direction of the waterproof connector

USB FTDI Cable IP67 waterproof round connector Manufacturers tell you that the waterproof connector is a connector with the ability to work underwater, which can provide normal, safe, and reliable power supply and signal transmission to the electronic components, and can also play a very good role in the waterproof and dustproof effect.

What is Active Cable?

Using active cables has many advantages over passive cables. Our Premier Cable is an cable asemblies manufacturer over 18 years. Leave us messages now for more active cable details.

What is the difference between DB9 and RS232?

DB9 and RS232 are not the same thing. DB9 belongs to the connector model, while RS232 belongs to a communication protocol. Follow our Premier Cable to learn more different between them.

What is etherCON used for?

Are you looking for the Outdoor Entertainment Cat5e CAT6A etherCON Cable supplier? Our Prmier Cable is a 18+ years manufacturer in the cable harness, enabling on-demand matching and customization. Email us now for more details!

Axia AES Digital Audio Transmission

Are you looking for an Audio Video Cable wholesaler? Premier Cable is an 18+year cable harness assembly supplier specializing in cable assemblies and related products, providing more OEM customized cables than any other manufacturer.

Do I have to write frequency when using the walkie-talkie?

Are you looking for the radio programming cable supplier? Our Premier Cable specializes in providing walkie-talkie cables for various major radio programming brands: Mototala, Kenwood, HYT, Yaesu, ICOM, Baofeng.