AVT MAGIC TH2, Hardware Manual

Page: 57 / 130

PAGE 57
W i n d o w s P C S o f t w a r e
5.6.1.2.4 Relay / TTL
The MAGIC TH2 system incorporates three GPIO Pins (TTL) which can be
programmed separately as input or output. Additionally, two Relays are
available.
The operating mode of a TTL-Pin -
Input
or
Output
is selected via the option
Direction
.
The following specification accounts for all three configuration windows
TTL1
,
TTL2
and
TTL3
.
TTL-Pin as input
FIG. 23 TTL-PIN AS INPUT
If you use a TTL-Pin as
Input
, you can program two different functions sepa-
rately when edges change:
•
Positive edge
: The event is activated when the voltage on the TTL-Pin
changes from 0V to+5V.
•
Negative edge
: The event is activated when the voltage on the TTL-Pin
changes from +5V to 0V.
The following functions can be configured (
Function Code
):
–
Idle
: No function, the Pin is not used.
–
Call Out/Accept Call In
:
Via this function you can establish a connection to a certain
Phone
Number
. Under
Line
you select the line (
Line 1
or
Line 2
) on which the
connection is established (only in the ISDN operating mode). Under
Audio Line
you select the Audio line (
PRETALK
,
HOLD
or
ON AIR
)
which is activated when the partner accepts the call.