EMS Technologies Canada Ltd. HSD-400 Manuale Utente

Note: The logic for the System Configuration pins is reverse to the logic explained in 

ARINC 741 Characteristic Attachment 1-4, Note 19.

•

Pins marked “0” are signaled by strapping to “Fwd Address Common” (T7K).

•

Pins marked “1” are signaled by an open circuit-no connection.

•

Configurations resulting in all ones (“1") are invalid.

(9) System Mode Strap Pins Coding

The HSD-400 terminal must be externally strapped according to its intended 
operational configuration mode. Table 3-7 illustrates the system pin strapping for 
currently supported HSD-400 terminal operational modes and configurations 
(Stand-Alone Mode only). 

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. 

(10)User Data I/O Mode Pin Strapping

Data I/O Mode Pin strapping is required for HSD-400 terminals.

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-400 terminals, all channels are accessible for Swift64 Mobile ISDN via the 
ISDN port on a first come-first served basis. All modes detailed in Table 3-8 are also 
described in Figure 3-6.

The following statements apply:

•

The channel cards are pooled, which means that no particular card is operated 
in one of the selected modes.

TP4A to D

System Config #1 to #4

System Mode (coded, see Table 3-8)

TP4E to H

System Config #5 to #8

Not assigned (set to “1”)

MP5G to K

Data I/O Config #1 to #4

Note: Data I/O Mode (coded, see Table 

TP4A

TP4B

TP4C

TP4D

1

2

3

4

INVALID

1

1

1

1

Stand-Alone

0

1

0

1