Communication and Telecommunication Cables
Communications cables are cables that carry telephone, telegraph, fax documents, television and radio programs, data, and other electrical signals. It is formed by twisting more than one pair of mutually insulated wires. Compared with overhead wires, communication cables have the advantages of high communication capacity, high transmission stability, good confidentiality, and less influence by natural conditions and external interference.
ZMS’s communication and telecommunication cables include a wide range of applications. They include fiber optic cables, coaxial cables, city communication cables, submarine communication cables, etc. for voice, data, and signal transmission.
Structure and Laying Method of Communication and Telecommunication Cables
Communication cable: It is a communication line composed of multiple mutually insulated wires or conductors twisted into a cable core and an outer sheath that protects the cable core from moisture and mechanical damage. In places where the environment is particularly harsh, if necessary, the outside of the communication cable sheath can also be installed outside the protective layer.
Communication cable has a variety of laying methods such as overhead, direct burial, pipeline, and underwater. The structure is divided into symmetrical, coaxial, and integrated cables. The function is divided into the field and permanent cable (underground, submarine cable). Communication cable transmission band is wider, communication capacity is larger, subject to external interference is small, but not easy to repair. It can transmit telephone, telegraph, data, images, etc.
Classification of Communication Cables by Usage
The use of communication cables and the scope of use can be divided into six major series of products
That is, urban communication cables (including paper-insulated city telephone cable, polyolefin-insulated polyolefin-sheathed city telephone cable)
Long distance symmetrical cable (including paper insulated high and low-frequency long distance symmetrical cable, copper core foam polyethylene high and low-frequency long distance symmetrical cable, and digital transmission long distance symmetrical cable)
Coaxial cables (including small coaxial cables, medium coaxial, and tiny coaxial cables)
Submarine communication cables (including symmetrical submarine and coaxial submarine cables)
Fiber optic cables (including traditional cable type, ribbon array type, and skeleton type three), RF cables (including symmetrical RF and coaxial RF)
Communication Cable Application Occasion Classification
If according to the application occasions, communication cables can be further divided into the following three categories.
1. Long-haul cables: long transmission distance, generally for multiplexing, most directly buried in the ground, in a few cases using overhead installation, or installed in the pipeline.
2. Intra-city cables: the wires in the cable are “paired”, and the number of pairs is large. Generally installed in the pipeline, a small number of city cables are attached to the building or overhead installation.
3. Local cable: mainly refers to the use of communications cables in the telecommunications bureau, generally installed in the distribution frame, some are also installed in the trunk. Local cables are used between transmission equipment and switching equipment in the telecom bureau, as well as inside other bureau equipment. To prevent fire, sometimes it is necessary to add a flame retardant sheath to the bureau cable.
The Difference Between Communication Cable, Fiber Optic Cable, and Network Cable
Fiber optic cable is a new generation of transmission media, compared with copper media, fiber optic both in terms of security, reliability, and network performance has been greatly improved.
In addition, the bandwidth of fiber optic transmission greatly exceeds that of copper cable, and its support of the maximum connection distance of more than two kilometers is the inevitable choice for the formation of large-scale networks.
Because fiber optic cable has the advantages of good anti-electromagnetic interference, confidentiality, speed, transmission capacity, etc., it is also more expensive and rarely used in domestic applications.
Currently, there are two different types of fiber optics, single-mode fiber and multimode fiber (the so-called “mode” refers to a certain angle into the fiber bundle of light).
Multimode fiber is generally used to connect networks in the same office building or in relative proximity to each other.
Single-mode fiber, on the other hand, delivers higher quality data over longer distances and is often used to connect networks between office buildings or in more geographically dispersed areas.
If you use fiber optic cable as a network transmission medium, you also need to add optical transceivers and other equipment, so the cost investment is greater, and in general, applications are less used.
Twisted pair is a flexible communication cable containing pairs of insulated copper wires. It is characterized by its low price, so it is widely used, such as our common telephone lines, etc.
According to the maximum transmission rate, twisted pair cables can be divided into Category 3, Category 5, and Super Category 5.
Category 3 twisted-pair cable has a rate of 10mb/s, Category 5 can reach 100mb/s, while Super Category 5 is up to 155mb/s or more, which can be suitable for future multimedia data transmission needs, so Category 5 or even Super Category 5 twisted-pair cable is recommended.
Twisted pair cable can also be divided into shielded twisted pair (stp) and unshielded twisted pair (UTP). stp twisted pair although the rate is lower (only 4MB / s), the anti-interference than UTP twisted pair strong, so the price is also much more expensive, now this type of twisted pair cable cheap a few dollars a meter, the expensive well may be more than ten dollars to buy a meter. In contrast, UTP twisted-pair cable price is generally in a meter of a dollar or so, relatively inexpensive.
In addition, the common 10m and 100m unshielded twisted-pair cable popularly known as 10base-t and 100base-t, we can often see in the market. And twisted pair cable supporting the use of rj45 crystal head, used to make twisted pair cable and network card rj45 interface between the connector, its quality is directly related to the stability of the entire network, can not be ignored.
Coaxial cable is more familiar to many friends of a class of transmission media, it is a layer of insulated wire wrapped around the central copper conductor of the cable line. Its biggest feature is good anti-interference ability, stable transmission data, and also cheap, so it was once widely used, such as closed-circuit television lines.
However, coaxial cables used to be used more often, mainly because coaxial cables make up a bus structured network at a lower cost, but damage to a single cable can lead to paralysis of the entire network and maintenance is difficult, which is its biggest drawback.
Coaxial cables for Ethernet applications are mainly divided into two types: coaxial cable (10base5) and fine coaxial cable (10base2). Nowadays, coaxial cables are not used much, but there is still a market for fine coaxial cables. The fine coaxial cable line is generally sold in the market for a few dollars a meter, not too expensive.
In addition, the coaxial cable is used to connect with the BNC head, the coaxial cable sold in the market is generally connected with the BNC head finished products, which you can directly choose.
Service of ZMS Company
Over Productions Service
ZMS has a wide range of cable and wire products for you to choose from. We will provide caring services and professional project solutions for everyone who needs them.
Quality Certification Services
ZMS cable products are manufactured according to GB, IEC, BS, NFC, ASTM, DIN, and other international standards. Our technical team can customize cable products that meet your requirements according to your need.
Profession Customer Service
ZMS provide free professional consulting services to provide you with one-stop project solution services and rapid product delivery solutions.
Delivery And Shipping Services
While ZMS provides high-quality cables, we also provide good delivery solutions. While ensuring the safe delivery of products, we provide the best packaging and transportation solutions, greatly reducing customers’ transportation costs.
Packaging of ZMS
ZMS cables packaging are provided in the form of wooden reels, corrugated boxes and coils. The cable ends are sealed with BOPP self-adhesive tape and a non-hygroscopic sealing cap to protect the cable ends from moisture. We can print the required marks on the outside of the barrel with waterproof material according to customer requirements.