registration question

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  • Updated 1 year ago
Hi, I have a question regarding device registration. I am currently trying to setup a raspberry pi with a SIM800 modem on the aeris network. My device powers on and automatically registers and I am able to start a data session and ping ok. However, after powering down and back up, the device's registration was not updated to the latest date/time values. Is this normal, or should the "Last registration at:..." value on the Devices diagnostic area be updated every time the device is powered on?

There is also a "Last deregistration at..." value which is not updated either, so I'm thinking I'm doing something wrong while hanging up/disconnecting from the network.

Thanks,
Eric
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Eric Carpenter

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Posted 1 year ago

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Jesse Hamus, Official Rep

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Hi Eric,

Thanks for posting to the Community Forum.  During a power down procedure the device is initiating a detach procedure from the network's Mobile Subscriber Center (MSC) and Home Location Register/Visitor Location Register (HLR/VLR) thru messaging and protocols.  We should see a Deregistration record event type upon completion of device purging from the network. Conversely, you should observe a Registration upon device power up and completion of device registration process.  

To answer your question pointedly, we should see an update to Last registration at and Last deregistration at in the NEO portal fields.  

I hope this answers you question.  If you wish for further investigation please provide a SIM identifier and we can take a look into.

Kind regards,

Jesse
NEO Support Team   
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Eric Carpenter

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Hi Jesse,

Thank you for the reply and detail. I am not seeing updates to "Last registration at" and "Last deregistration at" in the NEO portal fields. The SIM in question is ICCID 89185000150911604300. Again, the modem is a SIM800 embedded on a raspberry pi module. Since connecting it to your network is a manual process, I'm sure I'm just missing a proper AT command while hanging up/detaching?

Thanks!
Eric
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Eric Carpenter

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Hi,

Over the weekend, I sent a clear registration command from the NEO portal on this SIM. I powered up the module and it reregistered. After a short wait I powered down the module (without doing anything else/issuing any commands) and it did not deregister from the network. I am assuming that the module is not sending anything to gracefully disconnect from the network upon power down. Is there an AT command I can send before powering it down that will properly detach and deregister from the network?

Thanks!

Eric
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Jesse Hamus, Official Rep

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Hi Eric,

I reviewed the SIM800 AT documentation.  I did not see and I don't believe there is an AT command that will deregister a device from the network. 
 
Review of the device logs for ICCID 89185000150911604300 we can see the device registration updates, most recent 2017-03-19.  We can see successful data sessions most recent as March 22nd.  Review of logs show typical device connectivity behavior. 

We can see deregistration has last recorded on Jan 20th 2017.
Please allow me to clarify that a deregistration record is initiated by the network rather than the device.  Our carrier partners maintain the settings that initiate a deregistration event.  We typically(if applicable) will see network deregistraion events after a time period of 48 hours if the device is not initiating recent data sessions.  The network will purge the device and should generate a deregistraion record.  The deregistration is an inactivity timer on the network.    


Kind regards,

NEO Support Team
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Eric Carpenter

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OK, thank you for clarifying. It sounds like my device is operating normally then. Does that also mean that I will not see a registration event in the NEO portal every time I power on the device?

Thanks,
Eric
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Eric Carpenter

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I should further add that I have a "No registration in last 48 hours" warning in the NEO portal even though I have been registered to the network and transmitting data in that time frame.

Thanks again,
Eric
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Jesse Hamus, Official Rep

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No registration in last 48 hours is not an indication/warning of an issue as this is more of a notification.  The device will function as designed.  What this is an indication of is the device has remained stationary/fixed and not moved to another network MSC/switch and consequently created a new registration.
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Eric Carpenter

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Makes sense. Thank you Jesse!