ICB Type

0x01 (Action)

ICB ID

0x01

Data Length

0x02

Data[0]

Channels to Free Resources For

0x01 Channel A

0x02 Channel B

0x03 Both Channels

Data[1]

Resources to Cancel or Free

0x01 Digit Receiver

0x02 Transmit Call Progress Tone

0x03 Both Resources