3Si Security Systems Inc. GT83000A Benutzerhandbuch
GE865 Hardware User Guide
1vv0300799 Rev.15– 2012-04-23
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 57 of 77
TR1
BCR141W
TR2
SMBT2907A
R1
4,7K
R2
1K
D1
D1N4148
C1
33pF
+
-
+V buzzer
GPIO7
NOTE:
To correctly drive a buzzer a driver must be provided, its characteristics depend on the Buzzer
and for them refer to your buzzer vendor.
and for them refer to your buzzer vendor.
11.8.
Indication of network service availability
The STAT_LED pin status shows information on the network service availability and Call status.
In the GE865 modules, the STAT_LED usually needs an external transistor to drive an external
LED.
Therefore, the status indicated in the following table is reversed with respect to the pin status.
LED status
Device Status
Permanently off
Device off
Fast blinking
(Period 1s, Ton 0,5s)
(Period 1s, Ton 0,5s)
Net search / Not registered /
turning off
turning off
Slow blinking
(Period 3s, Ton 0,3s)
(Period 3s, Ton 0,3s)
Registered full service
Permanently on
a call is active
A schematic example could be: