2 Replies Latest reply: Feb 10, 2011 10:08 AM by Luciano Cesar Alakija Palma RSS

Signal strength - device doesn't connect with RSSI <2

Newbie

My device doesn't seem to want to connect when I have an RSSI of <2.  My phone tell me how many bars I have, then I put the same SIM into my device and I don't seem to be able to connect.  I'm using a Cinterion MC65i module and a taoglas antenna.  this is our prototype device (track and trace, just in case in matters).

 

In looking a the logs, I see many times that the device sees a signal strength of -75dBm.  I thought this was good.  But maybe not.  Any pointers on what could be wrong?

 

What's the proper range of signal strength that I should be within in order to connect?

 

Thanks for any help.

 

Simon

  • Re: Signal strength - device doesn't connect with RSSI <2
    Curtis Govan Expert

    Hi Simon,

     

    If the RSSI is less than 4-5, typically, the device won't connect.  The network transmits a minimum signal strength below which devices cannot connect.  This value is typically -104 dBm, which translates to a RSSI of 4-5.

     

    Regarding the measurement of -75 dBm, if you're not able to connect to this network, it's likely a network for which you do not have access.

     

    To ensure you don't have an issue with your device, put the test SIM in a reference device and verify the network coverage; i.e. you can connect with the reference device.

     

    Curtis

  • Re: Signal strength - device doesn't connect with RSSI <2
    Luciano Cesar Alakija Palma Newbie

    Hi Simon,

    (i see this is an old post , but I may still help you, or others on the dev community)

     

    Probably your device is a TC65.

    In order to understand better what is happening I would suggest you to provide the result of the following commands:

     

    at^moni

    at^scfg=radio/band

     

    Check if the radio band is correctly configured to the appropriate carrier band.

     

     

    Finally, it's also important to  understand which antenna you are using and where it is positioned. If you device is metalic and the antenna is internal, you might really not get signal...