GL865-QUAD: Can’t register in the US with default settings

8 thoughts on “GL865-QUAD: Can’t register in the US with default settings”

1. Hi,

   In my product containing a GL865-QUAD, I leave all the default settings and wait until the modem is attached to the GPRS before doing anything else. I use +CGATT to get the attach status. I use an international sim card, so the modem is always roaming (+CREG:5).

   It works fine in many countries but I have a problem in the US.

    

   In the US, the modem cannot register to a GSM network with the default settings, +CREG is always 2 (I have a limited power supply, so I limited the time to 15 minutes).

   With all the default settings, I tried +COPS=0 just after reboot. But it does not help.  

   I tried to select manually the band: #AUTOBND=0 and  #BND=3 and the modem managed to register in 40s. I also tried to enable the ENS (#ENS=1). It also registers quickly.

    

    

   So my questions are: how does #AUTOBND=2 work? why did it fail to register to the network?

   The ENS feature seems related to the US and AT&T,. can I enable the ENS everywhere in the world?

    

    

   Thanks 

    

   1. Hi,

      AUTOBND 2 ( default for GL865-QUAD) enables automatic band selection in four bands (at 850/1900 and 900/1800);
      Setting BND you simply force the module to register on  GSM 850MHz + PCS 1900MHz avoiding the search around all the band.
      ENS can be used also if not in USA.

2. Hi,

    

   my application send email (online mode) and it works fine in germany. But there must be a problem. If our customers leave germany we cant get any communication from the modul (GC864 Quad V2). I cant deliver emails anymore. Roaming is enabled for the SIM. What must i do to allow Roaming worldwide. Is there anywhere an applications note?

    

   Thanks for your help.

    

   Eric 

   1. Does the module register in a network? Is the correct GSM band enabled? Is it at least seeing any network?

      1. I only saw in SIM management from telit (m2mair-E-Portal)  the location update in italy for 2 times. Until now, i nothing changed or checked on band or network configuration in the modul. I thought the module automatically manages itself.

          

         For a better understanding i send the following AT code to the modul:

          

          

         AT+IPR?rn

         AT&K0rn    

         AT+CMEE=1rn

         AT+CPIN?rn       //=>  if PIN is required AT+CPIN=Parameter.PIN

         AT+CSQrn

         AT#CIMIrn

         AT+CGDCONT="1,"IP","Parameter.APN","0.0.0.0",0,0"

         AT#SCFG=1,1,0,0,600,50

         AT#CPUMODE=2rn

          

          

         AT#SGACT=1,0,"datalink","MONILOG"rn  

         AT#SGACT=1,1,"datalink","MONILOG"rn

          

          

         if status AT#SGACT is activated, continue with SMTP communication

          

         AT#SD=1,0,Parameter.SMTP_Port,"Parameter.SMTP_Server",0,0rn

          

         HELO

         AUTH

         …

          

         I saw there is a automatic band selection (#AUTOBND=2). Must it implementated in the AT command procedure or something else? 

         Provided GSM is supported by the network operator in the target area and the signal strength is sufficient and Roaming is active. What still needs to be set or checked, so that the modul can work or made connection worldwide?

          

         Thanks for your answer Cosmin.

          

         Eric

3. I only saw in SIM management from telit (m2mair-E-Portal)  the
   location update in italy for 2 times (Does the module register in a network?, Is it at least seeing any network? => I think, yes). Until now, i nothing changed or
   checked on band or network configuration in the module. I thought the module automatically manages itself.

    

   For a better understanding i send the following AT code to the module:

    

    

   AT+IPR?rn

   AT&K0rn    

   AT+CMEE=1rn

   AT+CPIN?rn       //=>  if PIN is required AT+CPIN=Parameter.PIN

   AT+CSQrn

   AT#CIMIrn

   AT+CGDCONT="1,"IP","Parameter.APN","0.0.0.0",0,0"

   AT#SCFG=1,1,0,0,600,50

   AT#CPUMODE=2rn

    

    

   AT#SGACT=1,0,"datalink","MONILOG"rn  

   AT#SGACT=1,1,"datalink","MONILOG"rn

    

    

   if status AT#SGACT is activated, continue with SMTP communication

    

   AT#SD=1,0,Parameter.SMTP_Port,"Parameter.SMTP_Server",0,0rn

    

   HELO

   AUTH

   …

    

   I saw there is a automatic band selection (#AUTOBND=2). Must it implementated in the AT command procedure or something else? 

   Provided GSM is supported by the network operator in the target area and the signal strength is sufficient and Roaming is active. What still needs to be set or checked, so that the modul can work or made connection worldwide?

    

   Thanks for your answer Cosmin.

    

   Eric

   1. Hi Cosmin,

       

      i found something in AT refernce guide and i changed my Code.

       

      AT+COPS=0                       //note from AT#AUTOBND

      AT+CREG=1                       //display the state of the network registration

      AT#ENS=0                          //each band in the world should be possible

      AT#AUTOBND=2                 //automatic band selection activated

       

      How can i check the state of the automatic band search (found or not found, all bands search no band available)? Start the automatic band search from last founded and usable band?

       

      AT+CREG?                         //check for network registration state, if registered (state=1,5)  continue with the my other AT commands

       

      Eric

       

       

      1. Registered means of course automatic band selection succeded and module camp in a network. Note if state is 2 you should wait to settle to 1 or 5 before continuing.