Modem Numbering; Signal Strength - Multitech MultiModem SF 100-G User Manual

Modem Numbering

When using the Web interface, the modem tabs correspond to the internal modems with the numbering
scheme shown below. The row of LEDs shows where the front of the unit is. Unpopulated modems should
be disabled as described in Network Setup.

Signal Strength

Signal Strength Command
To View Strength
For the SF 400/800 models without signal LEDs, signal strength can be viewed by using the following
AT command: AT+CSQ. This command is the default setting on the Network Setup > Cellular Modem
screen. This works for theSF 100 as well.
AT Command Response Example
+CSQ: xx, 99 (For xx, see the values chart below)
Signal Strength Reference Table
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
SF 100 Signal Strength LEDs
Multi-Tech Systems, Inc.
SF 100 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
MultiModem® iSMS User Guide for Administrators
Chapter 1 – Safety Information and Product Description
Signal Strength
Very weak signal
Weak signal
Stronger signal
Strongest signal
10