_

j

No information to transmit.

_

chr(127)

Demand mode

0

0

Emergency situation report

1

0..9,a..z

User defined

2

s

Weather request

2

u

Weather

3

0..9, a..z

User defined

4

a..l

User defined

4

m

Cargo information

4

n..t

User defined

4

u

Weather

4

v..z

User defined

5

1

Ground GMT request / delivery

5

2

Ground UTC request

5

3

Spare

5

4

Ground party address / voice go ahead

5

7

Alternate aircrew initiated position report

5

D

ATIS request

5

P

Temporary suspension

5

R

Aircrew initiated position report

5

U

Weather request

5

Y

Aircrew revision to previous ETA or diversion

5

Z

Airline designated downlink

7

A

Aircrew initiated engine data / take off thrust report

7

B

Aircrew entered miscellaneous message

8

0

Aircrew addressed downlinks

8

1

Aircrew addressed downlinks OFF

8

2..9

Aircrew addressed downlinks

A

1

Deliver Oceanic clearance

A

2

Unassigned

A

3

Deliver departure clearance

A

4

Acknowledge departure clearance

A

5

Request position report

A

6

Request ADS report

A

7

Forward free text message to aircraft

A

8

Deliver departure slot

A

9

Deliver ATIS information

A

0

ATIS facilities notification

B

1

Request Oceanic clearance

B

2

Request Oceanic readback

B

3

Request departure clearance

B

4

Acknowledge departure clearance

B

5

Provide position report

B

6

Provide ADS report

B

7

Forward free text to ATS

B

8

Request departure slot

B

9

Request ATIS information

B

0

ATIS facilities notification

C

0

Uplink to all cockpit printers

C

1

Uplink to cockpit printer No.1

C

2

Uplink to cockpit printer No.2

C

3

Uplink to cockpit printer No.3

C

A

Printer Status = Error

C

B

Printer Status = Busy

C

C

Printer Status = Local test mode

C

D

Printer Status = Out of paper

C

E

Printer Status = Buffer overrun

C

F

Printer Status = Reserved

F

3

Dedicated Data Transceiver Advisory

H

1

Message to/from terminal

H

X

Undelivered uplink report

M

1

IATA departure message

M

2

IATA arrival message

M

3

IATA return to ramp message

M

4

IATA return from airborne message

Q

0

Link Test

Q

1

Departure / Arrival reports

Q

2

ETA report

Q

3

GMT clock update

Q

4

Voice circuit busy

Q

5

Unable to deliver uplinked messages

Q

6

Voice to ACARS channel change over

Q

7

Delay message

Q

A

Out / Fuel report

Q

B

Off report

Q

C

On report

Q

D

In / Fuel report

Q

E

Out / Fuel destination report

Q

F

In / Fuel destination report

Q

G

Out / Return in report

Q

H

Out report

Q

K

Landing report

Q

L

Arrival report

Q

M

Arrival information report

Q

N

Diversion report

Q

X

Intercept unable to report

R

A

Command aircraft transmit diagnostic

R

B

Command / response downlink

:

;

Command change frequency