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Synchronous optical networking. Synchronous Optical Networking ( SONET) and Synchronous Digital Hierarchy ( SDH) are standardized protocols that transfer multiple digital bit streams synchronously over optical fiber using lasers or highly coherent light from light-emitting diodes (LEDs). At low transmission rates data can also be transferred ...
EoPoS is a standardized method for transporting native Ethernet frames over a SONET/SDH network, by first mapping into one or more PDH tributaries such as T1, E1, or DS3. The tributaries can then be dropped from a legacy ADM, delivered to the customer premises, and the PDH links resolved back to an Ethernet connection by a piece of equipment ...
Time-division multiplexing ( TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time in an alternating pattern. It can be used when the bit rate of the transmission medium ...
A chronic subdural hematoma (SDH) is a collection of blood on the brain’s surface, under the outer covering of the brain ( dura ). It usually begins forming several days or weeks after bleeding ...
The person may also suffer physical symptoms, such as increased blood pressure and heart rate, rapid breathing, muscle tension, nausea, and diarrhea. Negative cognitions and mood: This refers to ...
Plesiochronous Digital Hierarchy. The plesiochronous digital hierarchy ( PDH) is a technology used in telecommunications networks to transport large quantities of data over digital transport equipment such as fibre optic and microwave radio systems. [1] The term plesiochronous is derived from Greek plēsios, meaning near, and chronos, time, and ...
ADHD is the most commonly diagnosed mental disorder in children. Find out the symptoms in children and adults, types, causes, diagnosis, treatment, and outlook.
Physical coding sublayer. The physical coding sublayer ( PCS) is a networking protocol sublayer in the Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet standards. It resides at the top of the physical layer (PHY), and provides an interface between the physical medium attachment ( PMA) sublayer and the media-independent interface (MII).