Cable & Connector Glossary

A cable with built-in signal boosting electronics, enabling longer runs at full speed.

Passive cables carry signals without electronics; active cables embed chips to boost or regenerate signals for longer distances.

Adapters change connector shape without altering the signal; converters actively translate between protocols.

A USB-C feature that repurposes data pins to carry non-USB signals like DisplayPort or HDMI.

The amount of electrical current flowing through a cable, measured in amps (A).

HDMI features that send audio from a TV back to a soundbar or receiver over the same HDMI cable used …

The gradual loss of signal strength as it travels through a cable, increasing with distance and frequency.

An algorithm that compresses and decompresses audio data for transmission and playback.

An HDMI 2.1 feature that automatically switches a TV to its lowest-latency picture mode when a game console is detected.

A standardized wire diameter system where lower numbers mean thicker wire and better power delivery.

The ability of newer standards to work with older devices, typically at the older device's speed.

A signal transmission method using three conductors to cancel noise, standard in professional audio.

The maximum data transfer rate of a cable or connection, measured in Gbps.

The minimum curve a cable can be bent without damaging internal conductors or degrading performance.

The number of bits per audio sample, determining dynamic range — 16-bit for CD, 24-bit for studio recording.

The process and result of a cable passing official tests from a standards organization, proving it meets spec.

The reduction in maximum speed or power capacity as cable length increases beyond the optimal range.

The tradeoff between cable length and maximum achievable speed or power delivery.

The practice of organizing cables to reduce clutter, improve airflow, and prevent damage from tangling or sharp bends.

The combined specification of a cable's speed, power, and safety certifications that determine what it can reliably do.

The mechanical force holding a connector in its port, preventing accidental disconnection.

The widespread consumer confusion caused by USB's complex naming (e.g., USB 3.0 vs 3.1 Gen 1 vs 3.2 Gen 1).

The performance classification of Ethernet cables (Cat5e, Cat6, Cat6a, Cat7, Cat8) indicating speed and frequency limits.

An HDMI feature allowing devices to control each other — e.g., TV remote controls soundbar volume.

An official logo or label on a cable indicating it has passed compliance testing by a standards body.

The difference between cables that have passed official compliance testing and those that have not.

A compression technique that reduces color data resolution while keeping brightness detail, expressed as ratios like 4:4:4 or 4:2:0.

The number of bits used per pixel to represent color, determining how many distinct colors can be displayed.

A defined range of colors a display can reproduce, such as sRGB, DCI-P3, or BT.2020.

The formal process of verifying that a cable or device meets the requirements of a published standard.

The number of times a connector can be plugged and unplugged before mechanical failure.

The assignment of each pin in a connector to a specific function such as data, power, ground, or control.

A cable that falsely claims compliance with a standard or brand, potentially posing safety and performance risks.

Electromagnetic interference between adjacent wire pairs inside a cable, degrading signal quality.

Connecting multiple displays in series through a single output port, each monitor passing the signal to the next.

A device that converts digital audio data to an analog signal for headphones or speakers.

A specific Alt Mode that routes native DisplayPort signals over USB-C, the most common way to output video from USB-C …

A visually lossless compression standard that reduces video bandwidth requirements by roughly 3:1.

A hub expands ports passively; a docking station adds power delivery, display outputs, and dedicated controllers for enterprise-grade connectivity.

Whether a connection can send and receive data simultaneously (full) or only one direction at a time (half).

HDMI 2.1 feature enabling high-bitrate audio from TV to soundbar over the same HDMI cable.

A data structure that a display sends to the source device describing its capabilities (resolution, refresh rate, color).

An embedded chip in USB-C cables that communicates the cable's power and data capabilities.

The electronic marker inside USB-C cables that identifies cable capabilities to connected devices.

Conductive barriers in a cable that block electromagnetic interference from external sources and prevent the cable from radiating noise.

The method used to represent digital data as electrical signals on a cable, affecting usable bandwidth.

The USB PD 3.1 extension that increases maximum power delivery from 100W to 240W using 28V, 36V, and 48V voltages.

Techniques that detect and fix data transmission errors without requiring retransmission.

A cable with swapped transmit and receive pairs, historically needed to connect two devices of the same type directly.

Any charging technology that delivers power above the standard USB 5V/0.5A (2.5W) baseline.

A cylindrical clip on a cable that suppresses high-frequency electromagnetic interference.

The two main types of fiber optic cable, differing in core size, distance capability, and cost.

A communication mode where data can be sent and received simultaneously over the same link.

A charger using gallium nitride transistors instead of silicon, enabling smaller size and higher efficiency.

An unwanted current path between two grounded devices causing audible hum or buzz in audio systems.

A communication mode where data can only travel in one direction at a time, alternating between send and receive.

The initial negotiation between two devices to agree on speed, power, and protocol before data transfer begins.

A digital copy protection system that encrypts video between source and display.

A display technology that expands the range of brightness and color, requiring sufficient cable bandwidth to transmit.

The ability to connect or disconnect a cable while devices are powered on without causing damage or data loss.

The opposition to alternating current in a circuit, measured in ohms, critical for audio and video signal quality.

The outer covering of a cable that provides physical protection and determines flexibility and fire rating.

Unwanted variation in signal timing that causes data errors at high speeds.

A single differential signal pair within a cable, with total bandwidth scaling by the number of lanes used.

The time delay between sending data and it arriving at the destination, measured in milliseconds.

The two standard analog audio signal strengths: line level (~1V) for equipment interconnection, mic level (~1-100mV) from microphones.

A protocol for transmitting musical performance data (notes, velocity, timing) between instruments and computers.

A DisplayPort feature that allows one output to drive multiple independent displays.

Ethernet speeds between 1 Gbps and 10 Gbps (2.5G and 5G) over existing Cat5e/Cat6 cabling.

The maximum data rate of a network link, distinct from application-layer throughput.

A USB feature allowing phones and tablets to act as a host, connecting keyboards, drives, and other peripherals.

A safety mechanism that shuts down power delivery when current exceeds a cable's or device's safe limit.

A rack-mounted panel with rows of ports used to organize and manage network cable connections in a structured cabling system.

DC power (typically 48V) sent through a microphone cable to power condenser microphones.

Cable with fire-retardant jacket approved for installation in air-handling spaces (plenums) of buildings.

Delivering electrical power alongside data over standard Ethernet cables.

The set of voltage and current combinations a USB PD charger or cable supports.

The ability of USB-C docks and hubs to distribute power from a single charger to multiple connected devices.

A USB PD feature allowing fine-grained voltage adjustment in 20mV steps for optimal charging efficiency.

A set of rules governing how data is formatted, transmitted, and received over a cable connection.

Carrying one protocol's data inside another protocol's connection.

The number of times per second a display updates its image, measured in Hz, directly affecting cable bandwidth requirements.

The number of audio samples captured per second, measured in kHz, determining the frequency range of digital audio.

A hot-swappable module that converts electrical signals to optical (or vice versa) for high-speed network connections.

Whether an Ethernet cable has metallic shielding around its wire pairs to block interference.

The quality of an electrical signal as it travels through a cable, affecting speed and reliability.

Sony/Philips Digital Interface for transmitting digital audio over coaxial or optical (TOSLINK) cables.

A reinforced section where the cable meets the connector, preventing internal wire damage from bending and pulling.

The process of attaching an RJ45 connector or keystone jack to the end of an Ethernet cable.

The actual data transfer rate achieved in practice, as opposed to theoretical maximum.

A low-current charging mode used to safely top off a battery at near-full capacity.

A standard for encapsulating one data protocol within another, enabling multi-function cables.

The latest USB specification doubling the maximum speed to 80 Gbps symmetrical over USB-C cables.

Official compliance testing by the USB Implementers Forum ensuring a cable meets USB specifications.

A USB standard for negotiating higher voltage and current over USB-C, up to 240W.

Technology that synchronizes display refresh rate with GPU frame output to eliminate tearing and stutter.

The loss of voltage along a cable's length due to electrical resistance in the conductors.

The manufacturer's guarantee period and terms for cable replacement if the product fails under normal use.

The rate of energy transfer, equal to voltage multiplied by current (V x A = W).

A timing signal that synchronizes sample rates between multiple digital audio devices to prevent clicks and drift.