Multitech MultiModem iSMS SF100-G Administrator's Manual page 40

Chapter 4 – Using the MultiModem iSMS Web Interface
Signal Strength
Command
The string entered here is sent to the cellular modem so that the signal strength LEDs can display the current signal
strength. Use the following command: AT+CSQ
The following table lists the meaning of the xx values in the signal strength response and explains how they correspond to
the number of LEDs lit for signal strength.
AT+CSQ xx Values
0 to 6
7 to 14
15 to 23
24 to 31
Save
Click Save.
SIM Number
Specify the cellular phone number that the wireless provider assigned to your account. Do not enter dashes.
6125551234.
The MultiModem iSMS uses as an alternate means of synchronizing the system clock. If you are using SNTP for your time
stamp, you do not need to enter a SIM number.
Note: If your SIM card is locked, you cannot send SMS messages.
When a number is entered in this field, upon system start up (after the port is done being initialized and has registered on
the cellular network) the unit sends an SMS with the text "Time Setting Loopback Message" to the defined number. The
Cellular Network routes the SMS back to this port (assuming the account associated to the SIM in this port is setup
correctly, and the number you entered matches that of the SIM). The MultiModem iSMS then uses the time stamps found
within the header of this specific SMS to set its internal clock. This message (Time Setting Loopback) is counted in the SMS
Statistics, and Listed in the Trace Logs (Sent and Received categories). This message is logged in the SMS Inbox, however it
is not logged in the SMS Outbox.
Save
After configuring a modem, click Save before you select the next modem to configure from the modem tabs.
MultiModem® iSMS System Administrator's Guide
SF100 Signal LED Bars
No light
1 Bar LED is lit
1 Bar and 2 Bar LEDs are lit
1 Bar, 2 Bar, 3 Bar LEDs are lit
Signal Strength
Very weak signal
Weak signal
Stronger signal
Strongest signal
Example:
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