User's Guide
Table Of Contents
- 1 Introduction
- 1.1 Audience
- 1.2 Overview
- 1.3 Envoy CMU Features
- 1.4 Configuration Options for Envoy
- 2 Operation of Envoy
- 3 CPDLC Operations
- 3.1 Log On
- 3.2 Logoff
- 3.3 Lost Connection
- 3.4 Typical Message Composition
- 3.5 ATC Menu
- 3.5.1 ATC Request Menu – FANS 1/A+ and ATN B1 CPDLC Common
- 3.5.2 ATC REPORT Menu
- 3.5.3 WHEN CAN WE EXPECT
- 3.5.4 POS REPORT Message – FANS 1/A+
- 3.5.5 EMERGENCY (MAYDAY) Message – FANS 1/A+
- 3.5.6 ATC MSG LOG
- 3.5.7 CLEARANCE REQUESTS – FANS 1/A+
- 3.5.8 FREE TEXT 1/2
- 3.5.9 ATC VOICE CONTACT Message – FANS 1/A+
- 3.5.10 Cancel EMERGENCY, Cancel ADS
- 3.5.11 Flight Plan Transactions and Monitoring
- 4 Automatic Dependent Surveillance (ADS)
- 5 ACARS Operations
- 6 MAINTENANCE Menu
- Appendix A Acronyms
- Appendix B AFN Messages
- Appendix C Supported CPDLC Messages
- Appendix D ADS-C Tags
- Appendix E ACARS Message Labels
- Appendix F ATSU Call Signs (ICAO, IATA)
- Appendix G Fault Management
User Guide for the Envoy Data Link
Document Number: UG-15000 Rev. A Page 110 of 173
Appendix C Supported CPDLC Messages
The Envoy supports the CPDLC message elements detailed in the following sections:
• CPDLC Downlink Message Elements
• CPDLC Uplink Message Elements
Where applicable, optional preformatted text may be combined to form a message with up to 5
elements.
C.1 CPDLC Downlink Message Elements
The FANS 1/A+ A/1 and ATN B1 CPDLC downlink messages in this appendix are supported by
Envoy.
The following highlights identify CPDLC protocol-specific messaging support:
FANS and ATN B1 common
FANS only
ATN B1 only
Appendix Table 1 CPLDC Downlink Message (DM) Format
Section
ID
CPDLC DM/Example
Message Intent
PANS/GOLD
3.4.3.1
0 WILCO
The instruction is understood and
will be complied with.
4.6-18
Responses
1 UNABLE
The instruction cannot be complied
with.
2
STANDBY
Wait for a reply.
3
ROGER
Message received and understood.
4
AFFIRM
Yes.
5
NEGATIVE
No.
3.5.1.1
6
REQUEST [level]
REQUEST FL250
Request to fly at the specified
level.
4.6-19 Vertical
Requests
7
REQUEST BLOCK [level] TO
[level]
REQUEST BLOCK 20000FT
TO 25000FT
Request to fly at a level within the
specified vertical range.
8
REQUEST CRUISE CLIMB TO
[level]
REQUEST CRUISE CLIMB TO
FL250
Request to cruise climb to the
specified level.
9
REQUEST CLIMB TO [level]
REQUEST CLIMB TO
25000FT
Request to climb to the specified
level.
10
REQUEST DESCENT TO
[level]
REQUEST DESCENT TO
20000FT
Request to descend to the
specified level.
11
AT [position] REQUEST CLIMB
TO [level]
AT XYZ REQUEST CLIMB TO
25000FT
Request that at the specified
position a climb to the specified
level be approved.