Also known as: Broadcast Channel
Broadcast Channels (BCH) are downlink channels in a GSM system and are transmitted by the Base Transceiver Station (BTS).
BCH provide signalling information, so that the Mobile Stations (MS) in the cell can locate, synchronise and access the network. Three types of BCH are used: Broadcast Control Channel (BCCH), Synchronisation Channel (SCH), and Frequency Correction Channel