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18 September 2007
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-128 High-speed Data Terminal
Figure 1–4 and Figure 1–5 illustrate the user interfaces for single-channel HSD 
transceiversFigure 1–6 anFigure 1–7 illustrate the user interfaces for dual-channel HSD 
transceivers. For clarity, these figures only display Data Services. Voice devices are 
supported by direct connection to the HSD using EURO ISDN telephones or by indirect 
connection to a router or terminal adapter using two-wire telephone handsets. 
(1) Stand-Alone Mode User Interfaces
Dual-channel HSD transceivers support a maximum of two simultaneous instances 
of Swift64 Mobile ISDN and/or Mobile Packet Data Services (MPDS) services. 
(2) Collins Cooperative Mode User Interfaces
In Cooperative Mode installations, the HSD system provides one channel of Swift64 
data service and Aero H/H+ call capability. Swift64 and Aero H/H+ calls are 
simultaneously possible providing the following system conditions are met:
If a Swift64 call is in process and an Aero H/H+ call is attempted, either incoming 
or outgoing, the Aero H/H+ call is allowed to proceed providing that there is 
sufficient HPA power available to process all calls.
If any Aero H/H+ calls are in process, a Swift64 call is allowed providing that there 
is sufficient HPA power available to process both the Swift64 and Aero H/H+ calls.
(3) Honeywell Combined Mode User Interfaces
In single-channel transceivers in Combined Mode installations, the HSD system 
provides one channel of Swift64 data service and Aero H/H+ call capability. In 
dual-channel transceivers in Combined Mode installations, the HSD system provides 
two channels of Swift64 data service and Aero H/H+ call capability. Swift64 and Aero 
H/H+ calls are simultaneously possible providing the following system conditions are 
met:
If a Swift64 call is in process and an Aero H/H+ call is attempted, either incoming 
or outgoing, the Aero H/H+ call is allowed to proceed providing that there is 
sufficient HPA power available to process all calls.
If any Aero H/H+ calls are in process, a Swift64 call is allowed providing that there 
is sufficient HPA power available to process both the Swift64 and Aero H/H+ calls.
If both call types are in process, and system resources become limited due to 
dropping antenna gain, then Aero H/H+ calls will maintain priority.
(4) Selective Mode User Interfaces
In Selective Mode operation, dual-channel HSD transceivers support a maximum of 
two simultaneous instances of Swift64 Mobile ISDN and/or MPDS services.
(5) Multi-Channel Configurations
The HSD Multi-Channel configuration combines a dual-channel, Stand-Alone Mode 
HSD-128 Transceiver with one or more single-channel HSD-X Transceivers to add 
additional channels to the system.  
MPDS connections demand more power and may reduce channel availability. AMBE 
connections demand less power and may increase channel availability.