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 29 of 173
LSK
LABEL
Description
R5
DLK STATUS
Read-only. Data Link Status. (AVAIL(able) is required for logon). See details in Table 3-2
below.
R6
LOGON
Visible when required fields have been entered.
If the message times out before the ATSU sends a connection request, this field with
RESEND instead of LOGON at LSK R6.
The LOGON/STATUS 2/2 page displays different information, depending on which COMM is
available (FANS or ATN) in the airspace (see Figure 3-3).
ATC COMM can be enabled or disabled (ON/OFF), which affects whether the Envoy can
communicate with the ground. This setting is then reflected in the read-only DLK STATUS field at
LSK R5.
If the ATSU facility ID that the aircrew provides exists in the TSAP database, the Envoy logs into
the ATN COMM, which is the preferred COMM.
Figure 3-3 LOGON/STATUS 2/2 FANS (left), ATN (right)
Table 3-2 LOGON/STATUS 2/2 Fields
LSK
LABEL
Description
L1
ADS
<state>
FANS only. Header displays the current state of ADS reporting:
• ADS ACT = at least one contract is active
• ADS ARM = ADS is active, but no active contracts
• ADS OFF = ADS is off)
Pressing LSK L1 when the header reads ADS ACT sets the field to OFF, immediately
cancels any existing ADS contracts, and disables ATC facilities from establishing a new ADS
contract.
L2/R2
DATE/TIME
ATN only. ETD/EOBT, DEPARTURE status, including date and time. Format: DDMMMYY
(13NOV18) and HHMM (0417). If one field is supplied, the other one is required.
L3
MAX UPLK
DELAY
FANS only. Timeout for uplink messages. The current data authority (CDA) typically provides
this value upon establishing a CPDLC session. The typical standard is a 10-minute delay, or
6000 seconds. This value must be manually entered.
When set, the Envoy automatically rejects any uplink message whose arrival timestamp
exceeds the specified number of seconds (from generated timestamp) and sends a request
to resend the CPDLC message or to contact by voice.
The MAX UPLK DELAY setting is automatically erased with each ATSU transition and upon
flight completion.
L5
ATC ON
Header displays the current state: ON (default) or OFF.
When ON displays, a CPDLC session can be initiated
Pressing LSK L5 to set to ATC OFF terminates the active COMM session and aborts all
open messages
Setting to OFF when no active session exists sets DLK STATUS (LSK R5) to INHIBITED.