The USB (Universal Serial Bus) is a standard that defines the cables, connectors and used a bus to connect, communicate, computers, peripherals and electronic devices protocols Transmission Rates Low speed (USB 1.0). Transfer rate up to 1.5 Mbit/s (188 kB/s) used in keyboard, mouse ... transfer rate up to 12 Mbit/s (1.5 MB/s) High Speed ??(USB 2.0): Rate transferencia up to 480 Mbit/s (60 MB/s) SuperSpeed ??(USB 3.0) transfer rate up to 4.8 Gbit/s (600 MB/s) Connector Types 1 - USB type A (4 pin) 2. - USB type B (4 pin) 3 - Mini A (5-pin) 4 - Mini B (5-pin) 5 - Micro A (5-pin) 6 - Micro B (5-pin)

or horizontal. The micro USB with five pins, which pins identification (ID) Micro AB USB connectors special work. AB connectors with pin ID can allow the device to function as a connector A or B to standard USB technology. This gives the new smart phones and other devices the option to act as either a single storage device or as provi

The mini USB connectors are smaller than their standard counterparts and have USB fifth pin. The fifth pin is known as the pin ID and is typically not used in mini USB connectors. It was designed to allow later improved USB technology. The mini USB connectors have a cycle life of at least 5000 connections and disconnections, which accommodates the mobile nature of the devices that are designed to interact. The standard USB connectors are generally used with devices that are stationary and not disconnected often.

USB 3.0 is the second major revision of the standard Universal Serial Bus (USB) connectivity for computing. USB 3.0 has transmission speeds of up to 5 Gbit/s, which is 10 times faster than USB 2.0 (480 Mbit/s). Connector Types 1 - USB type A plug 2 - 3 USB type A female - USB type B 4 - Micro USB B

USB-C reversible USB version called USB cables USB Type C Type C or USB reversible. The important thing is this type of USB is that it has top and bottom. So you may save the blows that are given involuntarily to connect the connector upside down. It is also characterized in that when connected will make an audible "click". The USB-C or reversible USB cables can reach 10 Gbps and support USB 3.0, 3.1Use is estimated up to 10,000 applications and has some measures 8.4mm x 2.6mm is also compatible with USB 3.1 and USB indicate creators

When we talk about RJ45 ("Registered Jack" 45) we refer to a telecommunications network interface for wired connection of voice and data equipment.

This connector has 8 pins or connections and may have a specific category depending on the data transfer speed and bandwidth (category 5e, 6, etc.)

The common application is their use in Ethernet network cables under TIA/EIA-568-B standard that defines the arrangement of pins (pinout), but can also be used for other applications.

- Direct pin diagram:

EIA-568A
Pin No.1: WHITE-GREEN
Pin No.2: GREEN
Pin No.3: WHITE-ORANGE
Pin No.4: BLUE
Pin No.5: WHITE-BLUE
Pin No.6: ORANGE
Pin No.7: WHITE-BROWN
Pin No.8: BROWN

EIA-568B
Pin No.1: WHITE-ORANGE
Pin No.2: ORANGE
Pin No.3: WHITE-GREEN
Pin No.4: BLUE
Pin No.5: WHITE-BLUE
Pin No.6: GREEN
Pin No.7: WHITE-BROWN
Pin No.8: BROWN

- Schematic of crossed pins:

The crossover cable has one end with EIA-568A scheme and the other one with EIA-568B.

Depending on the quality and type, network cables are classified into categories that help us know the characteristics of them.

The categories of network cables most commonly used are:

- Category 5
- Category 5e
- Category 6
- Category 6
- Category 7

As can be seen, category 5e (enhanced or improved) and category 6A (Augmented), are an improvement of categories 5and 6, respectively, which it has improved the top speed and bandwidth.

The higher the category, the higher the speed of maximum data, the maximum 100 meters distance as its standard.

You can see a table which shows the 5 categories, where V is the maximum velocity, D is the maximum and MHz frequency which can work away.

The EAS RF (Electronic Article Surveillance) monitoring system or electronic surveillance system for items is a very common and effective method to guarantee the security of your business and minimize the risk of theft or theft.

This type of systems can be implemented in rigid or flexible systems, among which we can find the most common types.

Remember that depending on their type they can work in a frequencyto different.

• Magnetic label
• Acustomagnetic label, work on 58 MHz frequency.
• Radio frequency (RF) label, works in the frequency of 7.4-8.8 MHz, although they usually work in the 8.2 MHz, it is the most used in stores and businesses.
• Microwave label, they work in the frequency 2450 Mhz.

As mentioned, the most common security labels are RF, since it can befind in different formats, among them the most common:

• Rigid RF tag: Rigid security tags ideal for textile items, such as shirts, pants, coats etc ...
  This type of labels consist of a base of rigid plastic material connected to a pin type pin. Once united, it is only possible to uncouple them with a magnetic system.
• RF label with cable: Semi security labelsThanks to its steel cable, they can be adapted to other types of products, such as wine bottles, bicycles, machinery on display, etc. The decoupling system is by magnetic system as are the rigid ones.
• Soft RF label: Flexible security label, normally used in all types of products such as clothing, footwear, books, tools, food, etc ... thanks to its adhesive system. The system of deactIivation is through an RF deactivator. This deactivation system emits a very high RF impulse that manages to burn the internal diode, leaving the tag unusable.

Inside the RF tags we can find an aluminum helical antenna, connected to a diode or an RC circuit. This type of systems do not require power to operate, the anti-theft arches are responsible for sending an electromagnética that is absorbed by these labels that activate their circuit generating a return signal.

In the detection system based on EAS RF an emitter and receiver device is required, the most used are the anti-theft arches.
One of them works as an emitter and another as a receiver. Its installation must be done at the entrance or exit of the business and not placed less than 80 cm from each other.
These arches needan own food and can be regulated to be more or less sensitive.

The detection operation consists in that the emitter arc is sending (A) a signal that activates the label, when passing an alarm tag between the two arcs the label receives the signal from the emitter arc, this signal emitted by the label is received by the receiver arc (B) that is in charge of making the alarm go off.

The EAS RF deactivator is a device designed to electronically disable soft, adhesive and disposable anti-theft labels.

Its design is usually flat type, to facilitate its placement and installation on tables, counters etc.

Its operation is simple, it is only necessary to pass the label over the deactivator (A) and it will be unusable.

To deactivate the tagta (B) the system applies a very high electric impulse (C), this impulse is able to disable (destroy) the diode incorporated in the circuit of the label.

Once the label passes through the arc it will not detect the diode and the alarm will not be activated.