ICB Type

0x01 (Action)

ICB ID

0x01 or 0x04 Report Call Processing Event

Data Length

0x02 (for Digits event)

0x01 (for all other events)

.

Data[0]

Call Processing Event

0x00 No Event

0x01 Off-hook

0x02 Digits

0x03 Wink 1

0x04 Wink 2

0x05 Wink 3

0x06 Wink 4

0x07 Wink 5

0x08 Wink 6

0x09 Wink 7

0x0A Wink 8

0x0B Dial Tone

0x0C Reserved

All other events are reserved and must be 0x00.

Data[1]

Stage Numbers

This field applies only when the Call Processing Event is Digits (0x02). This field is a bit mask. You can report multiple stages at the same time. Valid entries for the bits of this field range are as follows:

Bit

0 Stage 1
1 Stage 2
2 Stage 3
3 Stage 4

Bits 4-7 are reserved and must be 0x00.