What are GSM 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.

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What is traffic channel GSM?

The traffic channels are the resources available to the user for either speech or data . A logical traffic channel in GSM is abbreviated by TCH. It can be used for either data or speech. The radio interface must support bi-directional transmission in order to support speech and data communication.

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What is TCH in mobile?

GSM has two types of traffic channels TCH/FS and TCH/HS. It is used both in the uplink and downlink after mobile has established connection with the GSM cell (BTS). It uses 26 frame multi frame structure. TCH/FS stands for traffic channel at Full rate speech and TCH/HS stands for traffic channel at half rate speech.

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