BTS Timers Package

T200 Timers -- in 5ms units

SDCCH SAPI 0

SDCCH, SAPI 0 layer 2 timer 
FACCH TCHF

Associated with a Full Rate TCH layer 2 timer
FACCH TCHH

Associated with a Half Rate TCH layer 2 timer
TCH SAPI 0

Associated with SACCH with TCH SAPI 0 layer 2 timer
SACCH SDCCH Associated with SACCH with SDCCH layer 2 timer
SDCCH SAPI 3 Associated with SDCCH, SAPI 3 layer 2 timer
T31xx Timers -- in 10ms units
T3101 Used with IMMEDIATE ASSIGNMENT 
T3103 Used with HANDOVER COMMAND
T3105 Used with PHYSICAL INFORMATION
T3107 Used with ASSIGNMENT COMMAND
T3109 Used for lower layer failure
T3111 Used for Channel Activation Delay
T3113 Used with Paging Messages
SACCH TCH SAPI 3 Associated with SACCH with TCH, SAPI 3 layer 2 timer