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Optical line termination. An Alcatel-Lucent OLT used by the French operator CityPlay. OLT and ONU in fiber optic network. An optical line termination (OLT), also called an optical line terminal, is a device which serves as the service provider endpoint of a passive optical network. It provides two main functions:
Website. ielts.org. International English Language Testing System (IELTS / ˈaɪ.ɛlts /) [6] is an international standardized test of English language proficiency for non-native English language speakers. It is jointly managed by the British Council, IDP and Cambridge English, [6] and was established in 1989.
An optical power meter (OPM) is a device used to measure the power in an optical signal. The term usually refers to a device for testing average power in fiber optic systems. Other general purpose light power measuring devices are usually called radiometers, photometers, laser power meters (can be photodiode sensors or thermopile laser sensors ...
Field testing is usually simpler. A special hand-held optical microscope is used to check for dirt or blemishes. A power meter and light source or an optical loss test set (OLTS) is used to test end-to-end loss, and an optical time-domain reflectometer may be used to identify significant point losses or return losses.
A fiber optic cable assembly with SC APC connectors, as commonly used to link optical network terminals to passive optical networks. A passive optical network (PON) is a fiber-optic telecommunications network that uses only unpowered devices to carry signals, as opposed to electronic equipment. In practice, PONs are typically used for the last ...
An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. It is the optical equivalent of an electronic time domain reflectometer which measures the impedance of the cable or transmission line under test. An OTDR injects a series of optical pulses into the fiber under test and extracts ...
Medical College Admission Test (MCAT) – (US and Canada) Optometry Admission Test (OAT) – Optometry Admission Test. Pharmacy College Admission Test (PCAT) Veterinary College Admission Test (VCAT) – no longer administered; American veterinary schools now use either the GRE or MCAT. California Basic Educational Skills Test.
The Occupational English Test (also known as OET ®) is an English language test that assesses the English language proficiency of overseas-trained healthcare professionals seeking to register and practise in an English-speaking environment. [1][2] The test is recognised by organisations around the world, including for migration and licensing ...