MC7700 succefully connected to GSM/WCDMA! Need LTE...

MC73, MC74, EM74, MC809x, MC9090

MC7700 succefully connected to GSM/WCDMA! Need LTE...

Postby axelowitzc » Fri Apr 05, 2013 9:16 pm

We are running the latest linux ubuntu version. We have successfully connected with several non-LTE technologies. We are using AT commands to communicate with the modem. For example the normal process of connecting to the internet that we have been using (AT commands) is:

1) AT!GSTATUS?
this checks a bunch of information regarding connection. When the computer boots and all our settings are good, we are able to connect to the internet automatically.

2) AT!SELRAT=<n>
so far, we have been using n = 5, 6, and 7 ("GSM and UMTS Only", "LTE Only", and "GSM, UMTS, LTE", respectively). Only 5 and 7 have been able to connect to the internet. When 6 is selected ("LTE Only") we have tried everything but with no success.

3) AT!SCPROF=<pid>,"",1,0,0,0
our pid is set up as:
AT+CGDCONT=<pid>,"IP","Broadband", since we are using AT&T

4) AT!SCACT=1,<pid>
this is one of the problematic steps when using "LTE only". it has worked in the past but it is not working any more.

5) AT+CGATT=1
this one almost never works in "LTE only" mode.


These are the steps we take to get internet connectivity with the non-LTE technologies. We are wondering what additional steps or settings we have to change in order to connect to LTE. Any help is appreciated.
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Re: MC7700 succefully connected to GSM/WCDMA! Need LTE...

Postby Rex_alex » Wed Apr 10, 2013 10:57 am

Hi,

Check for BAND setting using AT!BAND command.

Thanks.
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Topic Tags

Long Term Evolution, MC7700, WCDMA, AT Command, WWAN0, linux, Sierra Wireless, SELRAT, LTE, AT, MC Series, ubuntu, GSM, Cellular Modem, Sierra

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