Transmitting .......................................................................... 12
Receiving ............................................................................... 12
SCAN ........................................................................................... 13
Priority Scan .......................................................................... 13
2-TONE SIGNALLING ................................................................ 13
KEY FUNCTIONS ....................................................................... 14
Transmitting .......................................................................... 15
Receiving ............................................................................... 15
STATUS MESSAGE .................................................................... 16
Transmitting .......................................................................... 16
Receiving ............................................................................... 16
DTMF SIGNALLING .................................................................... 19
ii