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M A G I C
T O U C H
S o f t w a r e
ISDN BUS
P A G E 8 2
systems. On both systems connect pin 1 and pin 5 of the USER IO interface as
shown in Fig. 54. When switching over, one system now gets the valid MSN-1
block and the other gets the invalid MSN-2 block. Thus, always, only one sys-
tem is active.
To recognise on the MAGIC TOUCH user interface which MSN is active, the
name of the MSN block selected by the system, is displayed in the title bar of
the main window. The names of the MSN blocks can be entered in the MSN 1
Name and MSN 2 Name fields.
FIG. 54
S 0 2
S 0 1
POWER 115/230V
USER I/O
RS232C
LSD
HSD
0 I
OUT CMD IN
Pin 1 and 5 open: active
PIN 5: EARTH
TAB. 4
S 0 1
S 0 2
If the system is active the number of lines, as defined in the ISDN configura-
tion, is displayed on the MAGIC TOUCH user interface (see CHAPTER
7.7.3.4, page 73).
If free lines are still available, the inactive system can still be used simulta-
neously for advanced production. The MAGIC TOUCH user interface dis-
plays the relevant lines for the active and inactive systems as per TAB. 5 and
TAB. 6. If an odd number of call forwarding channels is used, the active sys-
tem always gets an additional call forwarding channel.
The configuration of the ISDN lines (see CHAPTER 7.7.3.4, page 73) with the
parameters Number of B Channels visible, First B Channel used for Call For-
warding and Number must be identical on both systems.
REDUNDANT OPERATION VIA MSN-BLOCK SWITCHING
So
1
2
EXTENSION BUS
PIN 1
EXAMPLE OF MSN ENTRIES (VALID FOR BOTH SYSTEMS)
MSN-1
5271189
5271189
5271219
5271219
POWER 115/230V
USER I/O
RS232C
LSD
HSD
0 I
OUT CMD IN
Pin 1 and 5 closed: inactive
MSN-2
1111111
1111111
1111111
1111111
So
1
2
EXTENSION BUS
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