Data Types
//Taken from ETSI TS 102 361-1
PIHeader = 0x00
VoiceLCHeader = 0x01
TerminatorWithLC = 0x02
CSBK = 0x03
MBCHeader = 0x04
MBCContinuation = 0x05
DataHeader = 0x06
RateHalfData = 0x07
RateThreeQuarter = 0x08
Idle = 0x09
RateFullData = 0x0a
USBD = 0x0b
//Don't know what this is... but it doesn't fit the regular format...
UnknownSmall = 0x13