User's Manual

DE910 Series Hardware User Guide
1vv0301183 Rev.1 – 2015-2-13
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10.5. Indication of Network Service Availability
The LED pin status shows information on the network service availability and Call status. In
the DE921 modules, the LED usually needs an external transistor to drive an external LED.
Because of the above, 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 TBD s, Ton TBD s)
Net search / Not registered / turning off
Slow blinking
(Period TBD s, Ton TBD s)
Registered full service
Permanently on
a call is active