Reads and writes to contactlist in Motorola Tetra terminals. Uses pySerial for communication
Example CSV file format:
1,6117011,0,User 1 ISSI
1,0048893230,6,User 1 mobile
2,0048131012,6,User 2 ISSI
3,6117013,0,User 3 ISSI
The CSV file should be in ISO 8859-1 format