Datasheet

INSYS GSM 4.2 I4 Overview
Dez-06 15
2.4.5 Audio interface
Pin layout, 4-pin RJ45 phone plug:
Pin Usage
1 Microphone (-)
2 Speaker (-)
3 Speaker (+)
4 Microphone (+)
Reference type: Handset Siemens-Gigaset
2.4.6 Antenna interface
The antenna connector at the front of the device has the type FME (male).
All commercial GSM antennas with a female FME connector can be used as antennas.
Ensure that the frequency band corresponds with the one of the provider when using
single band antennas (900 MHz or 1800 MHz).
2.4.7 Digital inputs
Alarm input
The alarm inputs are designed as pull-up and are on HIGH in inactive, open state. The
alarm inputs are activated by connecting to ground.
LOW Active 0 to 1 V
HIGH Inactive 4 to 12 V
The input current from LOW to internal +5 V is typically 0.5 mA.