User's Manual

Table Of Contents
Page 1–29
18 September 2007
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-128 High-speed Data Terminal
Each channel provides an ISDN 64 kbps connection that can be used for voice or
data services. The two channels in the HSD can be internally bonded to provide a
128 kbps ISDN data connection. Externally, all four channels shown in
Figure 1–10
can be combined to provide a single 256 kbps capability with the help of a router,
Ethernet hub, or Terminal Adapter.
Although the Multi-Channel HSD configuration is designed to accommodate one
HSD-128 and multiple HSD-Xs, the number of channels that can be active at one time
is dependent on the number of channels available at the Land Earth Station (LES),
the available HPA power, and the available antenna gain—which can vary over the
course of a flight.
At the time of printing, Multi-Channel HSD systems support four, simultaneous,
high-speed data connections—with software automated, staggered initiation of calls
(approximately 20 seconds apart).
Figure 1–4. System Interface Block Diagram Single Channel System
Channel Card
Data I/O Processor
ARINC Connector
HSD Transceiver
ISDN S/T ISDN S/T
RS-232 RS-232
10BT
RS-232
File Server
Laptop computer
Laptop computer
ISDN S/T
10BT
10Base-T
Router
NOTE: Only HSD transceivers PN 1110-A-0150
and 1110-A-0160 or HSD transceivers with
Service Bulletin 1110-SB-0004 accomplished
and HSD-X transceiver extensions support the
Ethernet (10BaseT) interface.