Signal Problem

[Ronny Cambangay]

Hi,

I have a problem getting with Multitech SF100-G.

I have the modem configured on the network, there is a sim card inserted, and I have enter the following AT command by telnetting to port 5000.

AT+CPIN
=> Ready

AT+CREG?
=> 0,2

AT+CSQ
=> error

But in the web GUI it says:
SIM Status Enabled

Signal Strength : 99

Im from philippines by the way…

Regards

Ronny

[Bryon Davis]

Hi Ronny,
It appears the SF100 isn’t able to find the cellular network. A signal strength of 99 means the radio isn’t connected.

Check to make sure the antenna is connected correctly and that you can receive a signal from the SF100 location.

You should also check the frequency band the radio is using with a AT+WMBS=? command, and then verify that it is set to use the same frequency as your cellular network. I believe the Philippines use 900/1800 frequencies.

Here are the AT+WMBS values:

<Band> Frequency Band Configuration
0 mono-band mode 850 MHz
1 mono-band mode 900 extended MHz (900E)
2 mono-band mode 1800 MHz
3 mono-band mode 1900 MHz
4 dual-band mode 850/1900 MHz
5 dual-band mode 900E (extended) /1800 MHz
6 dual-band mode 900E (extended) /1900 MHz
7 quad-band mode 850/900E (extended)/1800/1900 MHz

Also verify that the towers near you support 2G. The SF100 only supports 2G.

Regards,
Bryon

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