HL7618RD not registering at the network. +CEER code 15

IoT Modules Legacy HL Series
1

Hi!

I have a customer in the USA that is dealing with some connections problems.

bellow I give you the complete AT commands exchanged between the modem and the embedded processor:
002060B8.txt (3.3 KB)

2

Hi @rafael.dias,
The log shows error message No Suitable cells in Location Area MM #15. When the module receives this message meaning under the conditions that RAT on which the module is currently camped has no roaming agreement but another RAT does. At this time, it is specified that the module will be temporarily prohibited from camping in the current location registration area and will camp on another location area that includes another type of RAT. HL7618 supports only one mode as

at+ksrat=?

+KSRAT: (5) /// LTE only

OK

So pls check 2 things
-Verify the SIM supports LTE service
-Verify that you are using appropriate APN following

  • vzwims : Used for connections to IMS services. Required for TXT messaging.
  • vzwadmin : Used for administrative functions.
  • vzwinternet : Required for general Internet connections.
  • vzwapp : Required for PDA data service
  • vzwcf : Used for connections that must be routed through content filtering.
  • xx.vzwentp : Used for connections to mobile private networks.
    Note ‘xx’ would be replaced by the enterprise MPN identifier.
  • xx.vzwstatic : Used for static IP connections.
    Note ‘xx’ would be replaced by an appropriate static IP pool identifier.

Check APN by command
AT+CGDCONT?
Define APN context
AT+CGDCONT=?
Read more for parameters in the AirPrime_HL76xx_AT_Commands_Interface_Guide_Rev13_0.pdf (2.7 MB)

Please share any concerns you have and help us tick Solution if your problem is solved
Thanks

3

Hi!
Thank you for the answer.

Well, the equipment did not use the APN. When the firmware received the message +CGREG: 1,0 from the modem, it ended up interpreting it as an error and did not proceed with the connection on the APN.

Another question:
Is the CME ERROR here correct?

AT+KAAT=1
+CME ERROR: 100

4

Hi @rafael.dias,
It looks like KAAT commands not be affected on the module so you got CME ERROR 100. For this issue HL7618 not registering at the network, have you been able to reproduce it by using command line? Does it happen on the script only?
What are the following showing when you get +CEER?
AT+COPS?
AT+CGDCONT?
AT+CGATT?
Thanks

5

For this issue HL7618 not registering at the network,

OK

have you been able to reproduce it by using command line?

Well, at this moment, no. The station in on the customer. I`ll try to contact him to perform some tests.

Does it happen on the script only?

I didn’t understood this.

What are the following showing when you get +CEER?
AT+COPS?
AT+CGDCONT?
AT+CGATT?

I’ll ask the support guys to do this.

6

Hi!
After some months, our support at the customer executed the commands.

Here is the results:

+PBREADY

+CGREG: 4

+CGREG: 3
AT+CGREG?
+CGREG: 1,3

OK
AT+CEER
+CEER: "SM attach error",15,"+NEER: No Suitable cells in Location Area MM #15"

OK
AT+COPS?
+COPS: 0

OK
AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","m2minternet.apn","",0,0,0,0,0,0

OK
AT+CGATT?
+CGATT: 0

OK
7

someone knows what the CEER code 15 means?

8

Hi @rafael.dias,

The CEER code 15 means “No Suitable cells in Location Area MM #15” in the response of AT+CEER command

This issue is described by 3GPP organization. For more detail, you can refer to document of 3GPP here: https://www.etsi.org/deliver/etsi_ts/123100_123199/123122/13.06.00_60/ts_123122v130600p.pdf page 20, page 32.

I think you should try with another SIM.

Thanks,

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