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DS2153Q датащи(PDF) 3 Page - Dallas Semiconductor |
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DS2153Q датащи(HTML) 3 Page - Dallas Semiconductor |
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3 / 52 page ![]() DS2153Q 3 of 52 Reader’s Note This data sheet assumes a particular nomenclature of the E1 operating environment. There are 32 8-bit timeslots in E1 systems which are numbered 0 to 31. Timeslot 0 is transmitted first and received first. These 32 timeslots are also referred to as channels with a numbering scheme of 1 to 32. Timeslot 0 is identical to channel 1, timeslot 1 is identical to channel 2, and so on. Each timeslot (or channel) is made up of 8 bits which are numbered 1 to 8. Bit number 1 is the MSB and is transmitted first. Bit number 8 is the LSB and is transmitted last. Throughout this data sheet, the following abbreviations will be used: FAS Frame Alignment Signal CAS Channel Associated Signaling MF Multiframe Si International Bits CRC4 Cyclical Redundancy Check CCS Common Channel Signaling Sa Additional bits E-bit CRC4 Error bits |
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