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• Return to Primary after
Enter the number of minutes the modem can stay on the secondary carrier before attempting reconnection to the
primary carrier. (To disable this setting, enter zero for the number of minutes.)
Note: Connectivity will be lost for 30-60 seconds while attempting to reconnect to the primary carrier.
3.2.2 GSM SETTINGS
When the Active Carrier supports GSM (UTMS), fields on this page are enabled. A specific band of operation can be
chosen, status of the SIM is displayed, and PIN settings associated with the SIM can be cleared or set.
One of the key features of GSM is the Subscriber Identity Module (SIM), commonly known as SIM card. The SIM is a
detachable smart card containing the user's subscription information. This allows the user to retain his or her
information when switching handsets or wireless devices, independent of which handset or wireless device they are
using. The SIM has a security feature which, when enabled, requires the user to enter a valid PIN before the modem
will connect to the cellular network.
Figure 23 Cell Connection — GSM Settings
Band Selection
Band
A list of frequency bands appropriate for the Active Carrier. Select a specific band or (recommended) select All Bands.
Current Status
The Current Status section displays the current status of the SIM (whether a SIM card is present, and if so whether it is
valid) and PIN (whether a PIN has been entered and PIN security enabled).
SIM Status (status text)
• "SIM ACCEPTED" displays when a valid SIM card is inserted properly in the modem.
• "NO SIM, Insert Valid SIM and Press Reset" displays if the SIM card is invalid, missing, or installed incorrectly.
Vanguard 3000 Series Multicarrier Cellular Data Modem & IP Router PN 001-7300-100 Rev. B
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