Remote Commands:
1 - Recall Memory MM (*000-*099) (Gets memory from rpt.conf)
2 - Set VFO MMMMM*KKK*O (Mhz digits, Khz digits, Offset)
3 - Set Rx PL Tone HHH*D*
4 - Set Tx PL Tone HHH*D* (Not currently implemented with DHE
RBI-1)
5 - Link Status (long)
6 - Set operating mode M (FM, USB, LSB, AM, etc)
100 - RX PL off (Default)
101 - RX PL On
102 - TX PL Off (Default)
103 - TX PL On
