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Chapter 4 – Using the MultiModem iSMS Web Interface

MultiModem® iSMS System Administrator’s Guide 40

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 SF 100 Signal LED Bars Signal Strength

0 to 6 No light Very weak signal

7 to 14 1 Bar LED is lit Weak signal

15 to 23 1 Bar and 2 Bar LEDs are lit Stronger signal

24 to 31 1 Bar, 2 Bar, 3 Bar LEDs are lit Strongest signal

Save

Click Save.

SIM Number

Specify the cellular phone number that the wireless provider assigned to your account. Do not enter dashes. Example:

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.

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Multitech SF100-G-EU Especificaciones Pagina 40