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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
TP13 Pin E
0
MCDU/WSC NO. 3 INSTALLED
1
MCDU/WSC NO. 3 NOT INSTALLED
(2) When individually wired to the zero state, configuration pins TP12J, TP12K, and
TP13E indicate, respectively, that the inputs designated for MCDU/WSC No. 1, No. 2,
and No. 3 (pins MP3C/MP3D, MP3E/MP3F, and MP8J/MP8K, respectively) are
connected to an ARINC 429 source of line select/keypad control information, and
also the single SDU output (MP3J/MP3K) is wired to all appropriate MCDU/WSC(s).
The SDU only logs/reports/indicates bus inactivity on any of the three buses if the
respective configuration pin indicates the bus is supposed to be connected to an
ARINC source. The SDU can assume (for functional purposes) the presence of the
MCDU/WSC connections from the state of these configuration pins.
S. Priority 4 Calls to/from Cockpit
(1) The interpretation of this configuration pin is given in Table 5-28.
TP13 Pin A
0
DISALLOW PRIORITY 4 CALLS
1
ALLOWS PRIORITY 4 CALLS
(2) When this configuration pin is wired to the zero state, the SDU disallows priority 4
calls from being routed to or initiated from the cockpit. This state prevents ORT item
xiii (Appendix C) from being set to allow routing of ground-to-air priority 4 calls to the
cockpit headset. When this configuration is wired to the one state, the SDU lets
priority 4 calls be initiated from the cockpit and lets ground-to-air calls be routed to
the cockpit based upon ORT item xiii.
Honeywell International Inc. Do not copy without express permission of Honeywell.
MCS--4200/7200 Multi--Channel SATCOM System
Table 5-27. MCDU/WSC No. 3
Table 5-28. Priority 4 Calls to/from Cockpit
Interpretation
Interpretation
23- -20- -35
Page 5--68
15 Jul 2006
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