User's Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30 2-11
3 JUN 10
B. Placing Calls with the CEPT-E1 Interface
HSD-440 Mark 2 Terminal CEPT-E1 interface provides Cabin Telecommunication Unit
(CTU) access to two Aero-H+ 4800 bps AMBE voice calls simultaneously. Since the
CEPT-E1 interface shares the Aero H+ voice channels with the cockpit, CTU calls maybe
preempted from either the air or ground by higher priority calls.
Air-to-ground and ground-to-air calls over the CEPT-E1 interface are priority 4 (public)
calls.
For information on how to place a call over the CEPT-E1 interface, see the CTU
documentation.
C. Using Data Connections
For information about data connections, optimizing your airborne network and selecting
the service that best meets your needs, refer to the HSD High-speed Data Terminal
Developer’s Guide, MN-1252-13005.
D. Operating the MCDU
This section provides information about the MCDU and its interfaces—output and input
ports, the screen, and the keyboard.
(1) Output Ports
The MCDU transfers its identification and commands to the HSD-440 Mark 2
Terminal using 32 bit words and a 12-14.5 kbps output port, as defined in ARINC
Specification 429, Digital Information Transfer System (DITS).
(2) Input Ports
The MCDU receives identification information and displays data from individual
subsystems using seven input ports, as defined by ARINC Specification 429. Ports
1 and 2 are reserved for FMSs, and they operate at 100 kbps. Ports 3 to 7 are
available for the MCDU to communicate with the HSD-440 Mark 2 Terminal, and they
operate at 12-14.5 kbps.
(3) Screen
The MCDU displays all data on the screen, as shown in Figure 2-3.