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ETSI EN 300 175-2
M00002775
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ETSI EN 300 175-2 Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 2: Physical Layer (PHL)
standard by European Telecommunications Standards Institute, 06/01/2017
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ETSI EN 300 175-2 is one of the parts of the specification of the Digital Enhanced Cordless Telecommunications(DECT) Common Interface (CI).The present document specifies the physical channel arrangements. DECT physical channels are radio communicationpaths between two radio end points. A radio end point is either part of the fixed infrastructure, a privately owned FixedPart (FP), typically a base station, or a Portable Part (PP), typically a handset. The assignment of one or more particularphysical channels to a call is the task of higher layers.
The Physical Layer (PHL) interfaces with the Medium Access Control (MAC) layer, and with the Lower LayerManagement Entity (LLME). On the other side of the PHL is the radio transmission medium which has to be sharedextensively with other DECT users and a wide variety of other radio services. The tasks of the PHL can be grouped intofive categories: to modulate and demodulate radio carriers with a bit stream of a defined rate to create a radio frequencychannel; to acquire and maintain bit and slot synchronization between transmitters and receivers; to transmit or receive a defined number of bits at a requested time and on a particular frequency; to add and remove the synchronization field and the Z-field used for rear end collision detection; to observe the radio environment to report signal strengths.The present document includes New Generation DECT, a further development of the DECT standard introducingwideband speech, improved data services, new slot types and other technical enhancements.