User's Manual

Page 3–36
18 September 2007
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-128 High-speed Data Terminal
Note: The logic for the System Mode pins is reverse to the logic explained in ARINC
741 Characteristic Attachment 1-4, Note 19. For System Mode pins,
0=strapped to common and 1=open.
• Pins marked “0” are signaled by strapping to “Fwd Address
Common” (TP7K).
• Pins marked “1” are signaled by an open circuit—no connection.
• Configuration resulting in all “1’s” is Invalid.
7. User Data I/O Mode Pin Strapping – Combined/Selective
Data I/O Mode Pin strapping is only required for HSD transceivers models,
PN 1110-A-0150 and 1110-A-0160 or other HSD models that have Data I/O
Type 2 cards installed via Service Bulletin 1110-SB-0004.
The following settings allow placing restrictions on the way both channels are
used. If the user has no specific requirements then it is recommended to leave
both channels as “Unrestricted.”
In HSD transceivers with two channel cards, both channels are accessible
for Swift64 Mobile ISDN via the ISDN port on a first come-first served basis.
All four modes, as detailed in
Table 3–18, are also described in Figure 3–12.
In units where all Data I/O services are available (including Ethernet), the
following statements are valid:
• The channel cards are pooled, which means that no particular card is
operated in one of the selected modes.
• If one channel card becomes inoperative, and there is a conflicting
configuration (for example, 1 Reserved, 1 SCPC – for Swift64 Mobile
ISDN), then the remaining card operates in "Unrestricted" mode.
• A “restricted” channel is not handled by the Data I/O Controller, which
results in the channel not being accessible for SCPC via Ethernet or for
MPDS via RS232 or Ethernet.
• An SCPC channel is accessible for SCPC via Ethernet.
• An MPDS channel is accessible for MPDS via RS232 and Ethernet.
• An “unrestricted” channel is accessible for SCPC via Ethernet and MPDS
via RS232 and Ethernet.
Note: Use a ”Restricted” Data I/O Mode if only ISDN service is available.
Collins Cooperative 0011
Multi-Channel 0001
Table 3–17. Combined Mode System Mode Pin Strapping
Pin Status
System Modes TP4A TP4B TP4C TP4D
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