i-modul ISDN HIX V4
Connections
2.5
PIN Specifications
All following specifications are based on a supply voltage of VCC = 5 V ± 5%.
2.5.1
Reset input
Pin Signal Type
Description
11
Reset
Input
Normal state: 1 (internal pull-up resistor)
Reset: 0 (against GND)
A minimum time of 3 s for activation is recommended to trigger the
reset safely
Table 7: PIN specifications - Reset input
2.5.2
Indication Signals
Pin Signal Type
Description
13 OH
Output This output indicates Off-Hook of the modem.
Signaling:
Normal state:
High (hung up)
Off-Hook: Low
(off-hook)
15 RI
Output The ring indicator indicates an incoming connection attempt.
Signaling:
Normal state:
High
Ring: Low
Table 8: PIN specifications - indication signals
Figure 3: Connection example of the OH signal
11