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Section 3 and 4 treats the channel types in GSM as well as the mapping from the logical channels on to the physical channels. The modulation scheme and typical May 20, 2008 - GSM. GSM 05.02. TECHNICAL. August 1996. SPECIFICATION. Version 5.1.0. Source: ETSI Mapping in frequency of logical channels onto physical channels . print of the Portable Document Format (PDF) version kept on a specific network The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under Mapping in frequency of logical channels onto physical channels . GSM uses a variety of 'channels' in which the data is carried. In GSM, these channels are separated into physical channels and logical channels. The Physical channels are determined by the timeslot, whereas the logical channels are determined by the information carried within the physical channel. Mar 22, 2010 - Cellular Telephone System, GSM Channels, GSM Identities. Physical is Logical Channel which consists of the information deepesh/hie rarchy.pdf. GSM Network and Services 2G1723 Johan Montelius. Mapping of logical channels. • TCH/F + FACCH + SACCH. – needs a full physical channel. • TCH/H +