Logical Channels Different Types and Their Directions
TCH : Traffic Channel PCH : Paging Channel
CCH : Control Channel RACH : Random Access Channel
BCH : Broadcast Channel AGCH : Access Grant Channel
CCCH : Common Control Channel SDCCH : Standalone Dedicated Control Channel
DCCH : Dedicated Control Channel ACCH : Associated Control Channel
SCH : Synchronization Channel SACCH : Slow Associated Control Channel
BCCH : Broadcast Control Channel FACCH : Fast Associated Control Channel
FCCH : Frequency Correction Channel CBCH : Cell Broadcast Channel (for SMS)