AVT MAGIC AC1, Руководство по аппаратному и программному обеспечению

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PAGE 80
W i n d o w s P C S o f t w a r e
– Load Preset : Via this function you can load a Preset which you must
indicate under Preset .
– Backup Alarm Signal : With this function it is possible to feed in an ex-
ternal TTL alarm signal whereby an ISDN Backup (see CHAPTER
5.7.2.1.3, page 58) is established.
– Backup Disable : Via this external control signal you can avoid that an
ISDN Backup is established although the Backup Alarm Signal is ac-
tive (see CHAPTER 5.7.2.1.3, page 58).
– Set Information Base Entry : Special function for projects.
– String Command : Special function for projects.
Example:
With TTL1 a call is to be accepted on line 1. The system is to be config-
ured automatically to the MPEG 1B Mode. After the conversation is
over, the connection is to be dropped also with TTL1 .
Programming:
Positive edge:
Function Code: Call Number
Line: 1
Transmission Mode: MPEG 1B
Phone Number: -
Negative edge:
Function Code: Disconnect
Line: 1
FIG. 46 FUNCTION SEQUENCE OF THE EXAMPLE
1
5
6 9
9-pol. SUB-D male
to MAGIC DC7/AC1
(TTL/RELAY)
Switch is open:
Pin 2 = TTL 1 lies at +5 V (via internal 10 kOhm series resistor)
Switch is closed:
Pin 2 =TTL 1 is set to 0V (Pin 5):
existing connection is dropped
Switch is opened:
Pin 2 =TTL 1 is set to +5V:
Incoming call is accepted and connection established
Switch