User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 F-3
3 JUN 10
• Bit 32 indicates parity
You can find the HSD-440 Mark 2 Terminal identity information in the ORT. If no
information is available, the terminal identifies itself as SAL 307 by default.
ARINC 781 Supplement 1 describes the word format of these labels.
B. Understanding Status Word 1; Label 270
Bits are defined as shown in Table F-3.
Table F-3 Status Word 1 Bits
Bit(s) Description If Set
9–10 SDI (per ARINC
Specification 429
Section 2.1.4)
•Set to 00, all call
11 Data Link via CMU
Inactive
• HSD-440 Mark 2 Terminal is not able to offer Aero H data
services (due to a hardware fault or terminal is not logged on)
• ORT indicates that only CMU #1 is wired and label 270 is
missing for 3 or more seconds
• ORT indicates that only CMU #2 is wired and label 270 is
missing for 3 or more seconds
• ORT indicates that both CMU #1 and CMU #2 are wired and
both label 270 are missing for 3 ore more seconds
12 CMU 1 Inactive • CMU #1 bus label 270 is missing for 3 or more seconds
• Label 270 SSM coded to fail
• Label 270 bit 20 is not set
13 Voice Unavailable • Class Aero is not logged on
• Login Class is 1 or 4 (data only)
14 SELCAL This bit is set during the period when a ground to air call, including
a preemptive call, is being signaled but unanswered. If set:
• Indicates that a new cockpit voice circuit has been
established for a ground-initiated call
• Depending on the aircraft setting, this bit may result in a visual
annunciation of the new call on the EICAS/ECAM/EDU and
activation of the cockpit chime
• Crew should refer to the EICAS/ECAM/EDU to determine
which system is annunciating the call
• Bit should remain set until an appropriate acknowledgement
is received
• Crew should make sure that the bit has been cleared in all
transmitted samples for at least two seconds prior to being
set, and then set for at least four seconds or until the
annunciation is acknowledged, whichever occurs last