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.
Read moreWhat is BCCH carrier?
The radio frequency (RF) carrier used to transmit the BCCH is referred to as the BCCH carrier. The mobile station (MS) monitors the information carried on the BCCH periodically (at least every 30 secs), when it is switched on and not in a call.
Read more