 |
Download a printable version of the Interconnection Glossary. Select from the following: |
Numbers & Misc. | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | |
O
OA&M | Operations, Administrations and Maintenance. |
OAC | Operator Assisted Calls; Overlay Area Code |
OADM | Optical Add Drop Mulitplexer |
OAM Cell | Operation, Administration and Maintenance Cell |
OAM&P | Operation. Adiminstration, Maintanance & Provisioning |
OBC | Out-of-Band Control |
OAS | Office Automation Systems |
OC | Optical Carrier |
OC-1 | Optical Carrier 1. 51.86 Mbps = 1 DS-3, or 28 DS-1s, or 672 DS-0s |
OC-3 | Optical Carrier 3. 155.52 Mbps = 3 DS-3, or 84 DS-1s, or 2016 DS-0s |
OC-9 | Optical Carrier 9. 466.56 Mbps = 9 DS-3, or 252 DS-1s, or 6048 DS-0s |
OC-12 | Optical Carrier 12. 622.08 Mbps = 12 DS-3, or 336 DS-1s, or 8064 DS-0s |
OC-18 | Optical Carrier 18. 93.12 Mbps = 18 DS-3, or 504 DS-1s, or 12096 DS-0s |
OC-24 | Optical Carrier 24. 1244.16 Mbps = 24 DS-3, or 672 DS-1s, or 16,128 DS-0s |
OC-36 | Optical Carrier 36. 1866.24 Mbps = 36 DS-3, or 1008 DS-1s, or 24,192 DS-0s |
OC-48 | Optical Carrier 48. 2488.32 Mbps = 348 DS-3, or 1344 DS-1s, or 32,256 DS-0s |
OC-96 | Optical Carrier 96. 4976.64 Mbps = 96 DS-3, or 2688 DS-1s, or 64,512 DS-0s |
OC-192 | Optical Carrier 192. 9953.28 Mbps = 192 DS-3, or 5376 DS-1s, or 129,024 DS-0s |
OC-n or OCn | Optical Carrier Level n Signal |
OCQPSK | Orthogonal Complex Quadrature Phase Shift Keying |
OCR | Optical Character Recognition |
OCX | Object Linking and Embedding (OLE) control |
ODI | Open Datalink Interface |
OEM | Original Equipment Manufacturer |
OFDM | Orthogonal Frequency-Division Multiplex |
OHG | Operators Harmonization Group |
OLE | Object Linking Embedding |
OLTP | Online Transaction Processing |
OMA | Open Mobile Alliance |
OMC | Operations & Maintenance Center |
ONU | Optical Network Unit |
OO | Object Oriented |
OOF | Out Of Frame |
OOP | Object-Oriented Programming |
OPA | Outside-Premise-Addressability Unit; Online Privacy Alliance |
OPX | Off Premises Extension |
OQPSK | Offset Quadrature Phase Shift Keying |
ORB | Object Request Broker; Office Repeater Bay |
.org | Generic top-level Internet domain name |
OS | Operating System |
OS/NE | Operations System/Network Element |
OSC | Operator Service Call |
OSF | Open Software Foundation |
OSGi Alliance | Formerly known as the Open Service Gateway Initiative |
OSI | Open System Interconnect |
OSI Model | pen System Interconnection Model |
OSP | Online/Operator Service Provider |
OSPF | Open Shortest Path System |
OSS | Operations Support System |
OSSI | Operations Support System Interface |
OTGR | Operations Technology Generic Requirements |
OTASP | Over-The-Air Service Provisioning |
OUI | Organizational Unique Identifier |
OVSF | Orthogonal Variable Spreading Function |
“O” Crimp | An insulation support crimp for open barrel terminals with a crimped form resembling an O. It conforms to the shape of round wire insulation. |
“O” Ring | A doughnut-shaped ring of rubber used as a seal around the periphery of the mating insulator interface of cylindrical connectors. |
OFHC | Abbreviation for Oxygen-Free Conductive Copper; it has no residual deoxidant, a 99.95% minimum copper content, and an average annealed conductivity of 101%. |
Offset Terminal | Terminal that has a tongue forward of, and stud hole that is offset from, the centerline of terminal barrel. (Also called Offset Tongue Terminal.) |
Ohmic Contact | A contact between two materials across which the voltage drop is the same regardless of the direction of current flow. |
Open Barrel Terminal | Terminal with an open conductor and/or insulation barrel that is designed to be crimped around a conductor or wire. |
Open Entry Contact | A female-opening contact unprotected from possible damage or distortion from a test probe or other wedging device. |
Operating Interface | The surfaces at which a connector is normally separated. |
Operating Temperature | The maximum internal temperature-resistant capabilities of a connector in continuous service. |
Optical Cable Assemblies | A cable complete with connectors. Generally, a cable terminated by a manufacturer and ready for installation. |
Optical Connectors | Used to attach the transmit-and-receive optical fibers in the fiberoptic cable to the fiber optic transceiver. Optical connectors are designed to make connection by simply hand-tightening the nut on the external optical connector to the connectors on the fiberoptic transceiver. |
Optical Power (LED) | Radiant power, expressed in Watts. |
Optical Time Domain Reflectometry (OTDR) | A method for characterizing a fiber wherein an optical pulse transmitted through the fiber and the resulting backscatter and reflections are measured as a function of time. Useful in estimating attenuation coefficient as a function of distance and indentifying defects and other localized losses. |
Optical Transmitter | Receives electrical signals from the Ethernet controller via the fiberoptic transceiver’s interface cable and converts electrical signals to optical signals. |
Organic Water Soluble Flux | A solder flux containing potentially corrosive and conductive salts (hence, the circuit board assembly must be designed for water cleaning). |
OSI Standards | The International Standards Organization (ISO) has established the Open System lnterconnection (OSI), which provides a network design framework to allow equipment from different vendors to be able to communicate. |
Outgassing | De-aeration or other gaseous emission from a printed board assembly (printed board, component or connector) when exposed to a reduced pressure or heat, or both. |
Outgrowth | The increase in conductor width at one side of a conductor, caused by plating build-up, over that delineated on the production master. |
Outlet Box | Metal box that houses a switch or receptacle. |
Ovaled | A terminal or contact that has an oval-shaped barrel and aids in placing tow wires. |
Oven Soldering | Sometimes used for bath terminations, the oven soldering technique is preferred for making numerous terminations simultaneously. It is, however, limited in usefulness because few materials and components can withstand the sustained, high temperature. |
Oxidation | (1) The addition of oxygen to a metal (e.g., the addition of atmospheric oxygen to iron to produce rust). (2) Process where a metal loses electrons and is converted from metal of zero electrical charge to a metallic ion with a positive charge. |
Ozone Test | Exposure of material to a high concentration of ozone to give an accelerated indication of degradation expected in normal environments. |
Numbers & Misc. | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
