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Glossary - Information

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LAN - Local area network, typically with limited geography.

LANYARD - A lanyard is a cord or strap worn around the neck, shoulder, or wrist to carry such items as keys or identification cards. Many small electronic products have a Lanyard hole to tie the neck strap to the device.

LED (Light Emitting Diodes) - LEDs are available in a wide variety of sizes and shapes on RJ Connectors. The 'standard' LED has a round cross-section of 5mm diameter and this is probably the best type for general use, but 3mm round LEDs are also popular. Round cross-section LEDs are frequently used and they are very easy to install on boxes by drilling a hole of the LED diameter, adding a spot of glue will help to hold the LED if necessary. LED clips are also available to secure LEDs in holes. Other cross-section shapes include square, rectangular and triangular.

LED Polarity - For LEDs to be connected the correct way, the diagram may be labelled or + for anode and k or - for cathode (yes, it really is k, not c, for cathode!). The cathode is the short lead and there may be a slight flat on the body of round LEDs. If you can see inside the LED the cathode is the larger electrode. LED Polarity Chart.

LED Polarity Testing - LED's have a positive side and a negative side, and will only light up when wired correctly. Most LED's have one longer lead to indicate the polarity. LED Polarity Test Instructions and Equipment.

LED Color Chart - Xmultiple LED Color Chart for RJ Connectors.

Locator - A mechanical device attached to a crimp tool with multiple locators to position different size contacts for crimping. It is indexed to a proper position by rotating.

Laser - "Light Amplification by Stimulated Emission of Radiation;" an electronic - optical device that generates narrow, intense beams of light with a well-defined wavelength; often a source of light in fiber optic systems.

Light - Electromagnetic radiation in a wavelength range usually visible to the human eye.

Lightguide - Fiber or flexible bundle of fibers used to transmit light.

Loadstone - A lodestone, or loadstone, is a naturally magnetized piece of the mineral magnetite. They are naturally-occurring magnets, which can attract iron. The property of magnetism was first discovered in antiquity through lodestones. Used to test connectors which are magnetized.

Loopback Plug - A loopback plug is a device used to test ports (such as serial, parallel USB and network ports) to identify network and network interface card (NIC) issues.

Loose Buffer - Protective tube loosely surrounding a cabled fiber, often filled with gel.

Loss - Energy dissipated without accomplishing useful work, usually expressed in dB.

Lug - Mechanical termination attached to a conductor by crimping or soldering that allows for threading on to a terminal


MAP - MAP (Retail) Minimum Advertised Price

Mate - To join two connector halves in a normal engaging mode.

Material Safety Data Sheet - A Material Safety Data Sheet (MSDS), Safety Data Sheet (SDS), or Product Safety Data Sheet (PSDS) is an important component of product stewardship and workplace safety. It is intended to provide workers and emergency personnel with procedures for handling or working with that substance in a safe manner, and includes information such as physical data (melting point, boiling point, flash point, etc.), toxicity, health effects, first aid, reactivity, storage, disposal, protective equipment, and spill-handling procedures.

MC4 - MC4 Solar connectors and current capacity for different cable types. MC4 connectors are a type of single contact connector commonly used for connecting photovoltaic panels.

Mega - Metric prefix denoting one million (10^6).

Meter - Fundamental metric unit of length, equal to 39.37 inches.

Micro - Metric prefix denoting one-millionth (10^-6).

MicroSD - A flash memory card with a compact form factor.

Micron - A micrometer; one millionth of a meter; most often used to express wavelength, it is equal to 1000 nanometers (nm).

Mil - 0.001"; Measuring unit used to express the diameter of wire or thickness of insulation over a conductor.

Milli - Metric prefix denoting one thousandth (10^-3).

Min/Max Stocking Program - Xmultiple stock program for customer with monthly or bimonthly orders. How the program works?

Mode - A component of a general configuration of a propagating wave front, characterized by a particular geometrical pattern and propagation constant.

Moisture Resistance - Ability of a material to resist absorbing atmospheric moisture. IPC (Association Connecting Electronic Industries) created and released IPC-M-109.

Moisture Sensitivity Levels - IPC (Association Connecting Electronic Industries) created and released IPC-M-109, Moisture-sensitive Component Standards and Guideline Manual. Moisture Sensitivity Level relates to the packaging and handling precautions for some semiconductors. The MSL is an electronic standard for the time period in which a moisture sensitive device can be exposed to ambient room conditions (approximately 30XC/60%RH). MSL for RJ connectors.

Multimode Fiber - Fiber that transmits many modes.


NAFTA - The NAFTA Certificate of Origin is used by Canada, Mexico, Puerto Rico, and the United States to determine if goods imported into their countries receive reduced or eliminated duty as specified by the North American Free Trade Agreement (NAFTA).

Nano - Metric prefix denoting one-billionth (10^-9). Near Infrared - part of the infrared electromagnetic spectrum near visible wavelengths, in the range of 700 to 1500/2000 nm.

Nadcap - The Nadcap Quality System requirements are defined by the Nadcap Aerospace Quality Systems Task Group, a body made up of subscribers and suppliers. Their requirements are defined in Nadcap Operating Procedure (NOP)-002 which is online at under View User Documents. Having reviewed the procedure, if you still have questions, please contact us.

NEC - The National Electrical Code (NEC), or NFPA 70, is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States. The NEC, while having no legally binding regulation as written, can be and often is adopted by states, municipalities and cities in an effort to standardize their enforcement of safe electrical practices within their respective jurisdiction. In some cases, the NEC is amended, altered and may even be rejected in lieu of regional regulations as voted on by the governing bodies of any given locale.

NGFF- M.2 (NGFF) is the new form factor for Ultrabooks, Tablets, and PCs. NGFF was invented for PCI-SIG by Intel and it is developed for flat and high-efficiency equipment. The multiple function such as Wi-Fi, BluetoothR, and SSD is covered as one card. This is a multi-function card and this multiple function card supports high speed signal integrity such as USB3.0 and SATA3.0.

NRTL - Nationally Recognized Testing Laboratories (NRTLs). NRTL is the Nationally Recognized Testing Laboratory (NRTL) Program, which is a part of OSHA's Directorate of Technical Support and Emergency Management.


O-Ring - Elastic polymer gasket that allows a moisture seal to have a circular cross section.
Ohm - metric unit of electrical impedance or resistance.

OCL- OCL is Open Circuit Inductance. To add inductance to a circuit, electronic components called inductors are used. Inductors consisting of coils of wire to concentrate the magnetic field and so that the magnetic field is linked into the circuit more than once.

ODS- Ozone Depleting Substances. The Compliance Offset Protocol Ozone Depleting Substances (ODS) Projects provides methods to quantify and report greenhouse gas (GHG) emission reductions associated with the destruction of high global warming potential ozone depleting substances sourced from and destroyed within the U.S. that would have otherwise been released to the atmosphere.

Outer Conductor - external conductive component in a coaxial structure, such as the housing in a coaxial connector.

Oxidation - The addition of atmospheric oxygen to metal, resulting in the form of rust; a type of corrosion.


Palladium - Palladium coatings are useful for many different purposes. From ASTM B679 V 98(2004)e1, Palladium is the lightest and least noble of the platinum group metals. It has a specific gravity of 12.0, which is substantially less than gold (19.3) and platinum (21.5). This yields a greater volume or thickness of coating and, consequently, some saving of metal weight accompanied by a small sacrifice in corrosion resistance and reflectivity.

PCI ExpressR 4.0e - PCIe 4.0 is the next evolution of the ubiquitous and general-purpose PCI Express I/O specification. The bit rate for the PCIe 4.0 specification will be 16GT/s. At 16GT/s bit rate, the interconnect performance bandwidth will be doubled over the PCIe 3.0 specification, while preserving compatibility with software and mechanical interfaces.

PCN - Product Change Notifications are an engineering resource.

PCMCIA - Acronym for Personal Computer Memory Card International Association V PCMCIA card is was original designed memory expansion storage. With advancement of technology, the PC Card developed to become network card, modem and hard disks to be use with the expansion slot found in many laptop computers. Product Change Notifications are an engineering resource.

PDCA - The Plan-Do-Check-Act cycle was developed by Walter Shewart. W.Edward Deming later provide this system to the people he worked with over his career. The PDCA concept which is deployed within the processes of a quality management system and once applied it provides a continuous improving process capability.

PFOS - European Commission Directive 2006/122/EC of 12 December 2006 regarding PFOS
We hereby confirm Xmultiple Technologies, Inc. products and manufacturing processes are in compliance with the above referenced Directive restricting the use of perfluorooctane sulfonates (PFOS).

PTFE - Common abbreviation for polytetrafluoroethylene, or the non-stick coating known under the Teflon brand name.

Phosphor Bronze - Strong, hard alloy that is resistant to corrosion and is therefore used in metal parts and springs.

Photon - Particle that acts as the carrier of electromagnetic radiation of all wavelengths; light can be viewed as a series of photons.

Physical Contact - Design feature of fiber optic connectors where the mating contacts' faces are in contact and under pressure provided by springs, resulting in lower loss.

Pico - Metric prefix denoting one-millionth of one-millionth (10^-12).

Pin Contact - Male contact usually connected to the "dead" side of a circuit and designed to mate with a socket (female contact).

Pin Layout for RJ Connectors - Vertical and horizontal contact pin footprint for RJ connectors.

Ping - A ping is an Ethernet packet that is sent from a source address to a destination address and back again. This allows the user to determine if the network will allow traffic to go from one point to another. If a customer cant ping the far end device, he cant send traffic there.

Plastic Clad Silica (PCS) - Optical fiber with a silica core and soft plastic cladding surrounding it.

Plastic Fiber - Optical fiber made of just plastic.

Plating - Process of coating metallic components with a thin outer layer of noble metal to improve conductivity, provide for easy soldering or prevent corrosion.

Plug - Part of the two mating halves of a connector that is free to move when not fastened to the other mating half.

PoE- Power over Ethernet (PoE) is a technology for wired Ethernet LANs (local area networks) that allows the electrical current necessary for the operation of each device, to be carried by the data cables rather than by power cords. This minimizes the number of wires that must be strung in order to install the network. PoE and PoE Enabled Connectors

PoE at- IEEE standard for extended power over Ethernet: 802.3at, or POE Plus. POE Plus features. How PoE Works

PoE++ - IEEE 802.3bt standard for extended power 60W or higher. PoE++

Polarization - Orientation of mating connectors so that the connectors can only mate in one direction.

Polarizing Pin, Key, or Keyway - Device used within a connector to accomplish polarization.

Polishing - Act of smoothing ends of fibers to an "optically smooth" finish to allow for maximum transmission of light between fibers at connections and minimize coupling loss.

Polyethylene - Thermoplastic heavily used in consume products for its toughness, flexibility at low temperatures, resistance to chemicals and moisture and relatively low price.

Potting - Act of sealing a cable termination or other part by applying a liquid composition that will harden into an elastic polymer or solid plastic material.

Power Inductor - A power inductor is used as an energy storage device. It accumulates energy in the magnetic field as current flows though it and then transfers all or portion of this energy into anotehr circuit during the alternate part of the switching cycle. Power supply inductors also are designed to filter high frequency ripple.

PPAP - A PPAP (Production Part Approval Process) report is intended as an industry guideline that details the specific reports and documentation necessary to gain part approval in the automotive industry. The PPAP is governed by the PPAP manual published by the AIAG (Automotive Industry Action Group).PPAP requirement List. PPAP requirements including, but not limited to the following:

  • Process Flow Diagram
  • Design FMEA
  • Process FMEA
  • Process Control Plan
  • Dimensional Results/Layout
  • Initial Process Study
  • Material, Performance, Test Results
  • Measurement System Analysis Studies
  • Qualified Laboratory Documentation
  • Appearance Approval Report
  • Sample Product
  • Special Customer Requirements
  • Part Submission Warrant (PSW)

PPM - PPM (Parts per million) is a measurement used by many customers to measure quality performance. A PPAP (Production Part Approval Process) report is intended as an industry guideline that details the specific reports and documentation necessary to gain part approval in the automotive industry. The PPAP is governed by the PPAP manual published by the AIAG (Automotive Industry Action Group.)

Press-fit Contact - Electrical contact that can be pressed into a hole in an insulator, printed board or metal plate.PPM (Parts per million) is a measurement used by many customers to measure quality performance.

Printed Circuit - Generic term used to describe a printed board produced by any number of fabrication techniques used with electrical interconnect systems; circuit obtained by printing and comprising printed components.

Printed Circuit Board Layout Examples - Examples of printed circuit board layout techniques.

Production Lot Traceability - Provides for the tracking of materials through their receipt, manufacture, assembly, inspection, stocking and final distribution, while maintaining quality assurance certification and tracking expiration dates.



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