Specifications

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NOTE: For some modules, the default configuration is set to the European (GSM-900
GSM-1800) band frequencies. Users in the US and Canada need to re-configure the
modem to the GSM-850 GSM-1900 bands. Use the "AT#BND=3" command to set the
proper band settings. Please see page 300 in the “Telit AT Commands Reference Guide”
for detailed info about the band configurations.
RF Specifications
Please refer to Telit’s specific module documentation for RF specifications.
LED Indication
The on-board LED DS4 shows information regarding network service availability and call
status.
LED status Cellular module status
Permanently off Cellular module off
Fast blinking (period 1s, Ton 0,5s) Net search / Not registered / turning off
Slow blinking (period 3s, Ton 0,3s) Registered full service
Permanently on A call is active
NOTE: The following section refers to EM-X270 - revisions 1.2 and older.
The cellular GSM/GPRS connectivity feature is based on the Telit GE864 module.
The GE864 module allows digital communication services wherever a GSM 850, 900,
DCS 1800 or PCS 1900 network is present.
The GE864 includes features like GPRS Class 10, Voice, Circuit Switched Data transfer,
Fax, Phone book, SMS support and ‘EASY GPRS’ embedded TCP/IP stack.
The module also provides SIM card interface with auto-detection and hot insertion.
The interface supports phase 2 GSM11.14 - SIM 3V.
The GE864 module is interfaced to the PXA270 processor via the BT_UART.
The SIM interface is connected to the on-board SIM card socket (see 4.11 for a detailed
SIM card socket description).
Audio Path Connection
The GE864 audio signals are connected to the EM-X270 audio system, providing the audio
functionality of a standard cellular phone. See section 3.4 for more details about the audio
path.