The RCA (Radio Corporation of America) connector is a connector used to send video signals or audio.
This is a circular two-contact connector; signal and ground, used with coaxial cables. Each signal uses a single cable and to differentiate color coded RCA connector on the set.
(1) Analog Audio:
Audio Left (White)
Audio Right (Red)

(2) Videoanalogical:
Video (Yellow)

(3) Composite Video:
Audio Left (White)
Audio Right (Red)
Video (Yellow)

(4) Video Component (YPbPr):
Y (Green)
Pb (Blue)
Pr (Red)

(5) Video components (RGB):
R (Red)
G (Green)
B (Blue)

(6) Digital Audio:
S/PDIF (Orange/Gold)

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.

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.

VDC would be the abbreviation for Volt Direct Current which translated would volts direct current. The idea of ??this type is unidirectional current to the load. Direct current is normally produced by batteries, thermocouples, solar cells and a dynamo electric machine type. The direct current can flow in conductors such as wires, but may also flow through semiconductors, insulators ... In the image: 1 - current per pulse 2 - Direct Current (DC) 3 - Alternating Current (AC) 4 - Variable Current

The RS232 connector is a connector type 9-pin connector is popularly called Series. It is a connector that was once widely used by various components of the PC, such as a mouse, keyboard ... but over time it has fallen into disuse and replaced by the USB connector trying to emulate the latest version number. It is currently used by robots, elevators, POS and industrial machinery.

HDCP (acronym for high-bandwidth digital content protection in English, that means protection of digital content of high bandwidth) is a specification developed by Intel to control the content of digital audio and video that is transmitted through DisplayPort, DVI connections, HDMI, Gigabit Video Interface (GVIF), or Unified Display Interface (UDI). The specification is proprietary, and their implementations must be licenciadas, of which Digital Content Protection is responsible. It is a type of digital rights management.

RS-232 (Recommended Standard 232, also known as EIA/TIA RS-232C) is an interface that designates a standard for the exchange of a series of binary data between a DTE (Data Terminal Equipment) and DCE (Data Communication Equipment , Data Communication Equipment), although there are others in which the RS-232 interface is also used. An equivalent definition published by the ITU is called V.24. The RS-232 is a connectorDB-25 type (25-pin), although it is normal to find the version of 9-pin (DE-9, or popularly also called DB-9), cheaper and even extended to certain types of peripherals (such as serial mouse PC).

A rack is a metal support designed to house electronic, computer and communications equipment. The measures for the width are normalized to be compatible with most equipment manufacturers. They are also called racks, cabinets, cabinets or closets. Each column has holes at regular intervals called U rack units (Pictured: 4) grouped in threes. The height (Pictured:5) of the racks is standardized and external dimensions of 200 mm by 200 mm. Being normal that from 4U to 46/47U height width types (Pictured: 7). Standard 600 mm or 800 mm Types of background (Pictured: 6) The depth of the frame is not standardized, as this flexibility is granted (Pictured: 8) to the equipment. The most common are: - 450 mm - 600 mm - 800 mm - 900 mm - 1000 mm - 1200 mm Type 19-inch rack can find various types of 19-inch rack. Rack Mural (Pictured: 2): Used to accommodate electronic network. They are the smallest and are anchored to wall. Rack Pie (Pictured: 1): They are used primarily for servers, UPS and network electronics. Open Rack (Pictured: 3): Open Rack Racks are available only modelsstructure, eliminating doors and other accessories.

The acronym "HDMI" stands for "High Definition Multimedia Interface".

The HDMI interface allows transmission of video and audio between devices, supporting video resolutions 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 1440p, 1600p.

Different HDMI versions

HDMi 1.0
- December 2002.
- Maximum transfer of 4.9 Gbit/s.
- Supports up to 165 Mpixels/s video mode (1080p or UXGA 60Hz) and 8-channel/192 kHz/24-bit audio mode.

HDMI 1.2
- August 2005.
- Added support for One Bit Audio, used on Super Audio CDs, up to 8 channels.
- Availability HDMI Type A connectors for PC.

HDMI 1.3
- June 2006
- Bandwidth 340 MHz.
- Data rate of 10.2 Gbit/s.
- Dolby TrueHD and DTS-HD,

HDMI 1.4
- Send video and audio HD
- Data and 3D video.
- FullHD to XHD (eXtended High Definition) up to 4096 × 2160 pixels (24 frames per second) or 3840 × 2160 (30 fps).
- Audio Return Channel that will need fewer cables to have a surround sound system connected to the TV.
- Built-in Ethernet connection cable with speeds up to 100 Mbit/s own.

HDMi 2.0
- September 2013
- Bandwidth of up to 18 Gbit/s
- 4K @ 50/60 (2160p) video
- Up to 32 audio channels to a multi-dimensional immersive experience
- Up frequency 1536kHz for maximum audio fidelity sound
- Simultaneous Delivery 2 streaming video to multiple users on the same screen
- Streaming audio up to 4 users
- Support theater angle 21:9 radio
- Dynamic synchronization of video and audio in streaming
- Extensions of CEC commands to control multiple devices from a single point.


Type HDMI

Type A (picture 1): It is the standard connector used in almost all devices.
Type B (picture 2): A connector rarely used.
Type C (picture 3): A connector widely used in tablets, smartphones and other devices.
Type D (picture 4): A connector used in smartphones.
Type E (picture 5): IA connector used for vehicles connectivity.

HD is the term used to differentiate the systems that generate, transmit or support HD content (High Definition) with those of standard definition or low definition (SD).

HD resolutions are usually at least 1280 x 720 pixels by taking the ratio "width x height". Being the height, 720 pixels, which make high resolution.