OPTICAL MASTER UNIT MARK I
PRODUCT DESCRIPTION AND USER’S MANUAL
Cobham Wireless – Coverage Date: 4-Jan-18 www.cobham.com/wireless
Document number:A1829300UM Rev. 3.1
Page | 31
3.10.2 Communication via Wireless Modem
There are two different ways of communication for a wireless (GSM) modem:
• Using data call / modem connection.
This requires the SIM-card in the modem to be configured
with data service.
• Using SMS to configure the repeater with simple text messages. SMS functionality is not
implemented in this SW release.
The Element Manager always uses data call communication with the repeater, why all repeaters
being controlled by the AEM must have data service enabled on the SIM card.
Configuring the repeater to send alarms and reports via SMS it is still possible to establish data calls
to the repeater, as long as the SIM card is data service enabled.
3.10.2.1 Modem Configuration, not using GPRS
Select “Configuration”
and “Communication”
Select Data Call
Initialization string
Connect times
AEM addressed are
set via the AEM
• Select Data Call
• Set the modem initialization string. This string differs between
networks. Primary recommendation is AT+CBST=71,0,1;\Q3. If remote
communication cannot be established try 7,0,1 or 0,0,1 or 7,0,3. For
more information please refer to the section on Troubleshooting
Remote Communication.
• Tick “Enable Automatic Modem Power Cycling” for the modem to be
power cycled once every 24 hours. Set the time at which the modem
should be tested. This function ensures that the repeater always is
logged in to the network.
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