Q921Tx21CB_t 376 src/isdn/Q921.c Q921Tx21CB_t cb21, Q921Tx21CB_t 146 src/isdn/include/Q921.h typedef int (*Q921Tx21CB_t) (void *, L2UCHAR *, L2INT); Q921Tx21CB_t 184 src/isdn/include/Q921.h Q921Tx21CB_t Q921Tx21Proc; Q921Tx21CB_t 209 src/isdn/include/Q921.h Q921Tx21CB_t cb21,