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GSM Connection Status
• Service Type
Determines the type of network your device has connected to; GPRS, EDGE, HSDPA, HSUPA, or HSPA. "Check SIM"
will be displayed if the SIM is invalid, missing, or if the PIN needs to be entered.
• MDN
The Mobile Directory Number is the phone number assigned to the SIM card supplied by the carrier. The MDN may
display "NOT AVAILABLE" if the PIN status is disabled or the MDN is unknown.
• IMEI
The International Mobile Equipment Identity is a unique 15-digit number that serves as the serial number of the
GSM module in the modem.
• IMSI
The International Mobile Subscriber Identity is a unique number which designates the subscriber. This number is
used for provisioning in network elements. The IMSI may display "NOT AVAILABLE" if a SIM card is not detected.
• Country
Country name or code associated with the GSM network.
• Carrier
Cellular provider name or code.
• Cell ID
Network Identifier, this is supplied automatically from the network.
• Channel
Cell Site channel number at which the modem is connected and is useful for the carrier in the event of
troubleshooting.
• Frequency
Cellular frequency band the modem is using, 800MHz and 1900MHz are mainly in the US and outlying areas. In
some cases 900 and 1800 will be seen for European or Foreign carriers.
• Roaming
Options are either Roaming or Not Roaming.
• Signal Strength (dBm)
Measured in dBm, this is the Received Signal Strength Indication (RSSI).
• EC/IO
Measured in dBm, EC/IO is a measure of interference. Values closer to 0 indicate weaker interference.
Vanguard 3000 Series Multicarrier Cellular Data Modem & IP Router PN 001-7300-100 Rev. B
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