Digit 5 (far left) TX or RX
RX: 2xxxxx
Digit 4 Coding (MH/MR/MMR)
MH: x1xxxx
MR: x2xxxx
MMR: x3xxxx
Digit 3 MODEM mode
V27ter nonECM: xx1xxx
V29 nonECM: xx2xxx
V17 nonECM: xx3xxx
V33 nonECM: xx4xxx
V34: xx5xxx
V27ter ECM: xx9xxx
V29 ECM: xxaxxx
V17 ECM: xxbxxx
V33 ECM xxcxxx
Digit 2 MODEM speed
2400: xxx1xx
4800: xxx2xx
7200: xxx3xx
9600: xxx4xx
12000: xxx5xx
14400: xxx6xx
16800: xxx7xx
Error Messages
19
3