FMB Device Blocking
Introduction
In 03.27.16.Rev.00 new feature has been implemented to disable device from operating when it is being used in banned countries.
In figure 1 block diagram of new logic is presented and it is presented below.
Functionality description
Device checks conditions to block or unblock device each 10 minutes starting from device startup.
2.1 Device Blocking
Device will automatically block itself when conditions will be met. All of the parameters are hardcoded and cannot be changed.
1. Device starts using banned Mobile Country Code (MCC). Allowed MCC list is made using Auto_APN.csv file. MCC removed from that list: 250 and 257.
2. Use of banned MCC for full 28 days.
Device is not counting days until ban, device saves timestamp when device should be blocked (current timestamp + 28 days). That was done to protect device from unnecessary NVRAM read/write operations.
There is possibility to reset this timestamp, to do so, device should stop detecting banned MCC and spend full 7 days without seeing it. In case, for example, if device have counted 10 days with banned MCC and stopped detecting it and to reset that time it has not been detecting banned MCC for 5 days and then again detected banned MCC, device will continue counting time before device block from 10 days as it is shown in figure 1.
This 7 days “counter” works in same way, it is not counting days it saves timestamp when block timestamp should be reset.
Device Unblocking
In order to unblock device, as it is shown in block diagram, device have to detect only allowed MCCs for full 7 days, have timesync and have SIM inserted. If this counter will be interrupted by founded banned MCC it will be reset.
This 7 days “counter” use same variable as 7days counter in device block part and it saves timestamp when device can be unblocked. In case if during this 7 days period conditions will be lost timestamp to unblock will be reset and user will have to fulfill conditions for full 7 days again.
Operating Device in Blocked State
FW upgrade downgrade rules
Once device will be flagged as Blocked, even in unblocked state it will not be able to downgrade firmware version below 03.27.16 or upgrade to newer.
Additionally, new manufactured devices with firmware which does support Device Blocking feature, will automatically have flag set to not allow device downgrade below 03.27.16 and upgrade to newer than 03.27.16.
Pass through command
In order to allow client to know the location of the vehicle in special cases, pass through for single command has been implemented. SMS/GPRS command “getgps” will be allowed to be sent every 10 minutes to get location of the device, when it is operating in Blocked state.
| Standard | Article |
|
EN 50665:2017 |
Health and safety - Article 3.1(a) |
|
EN 55032:2015+A11:2020 |
Electromagnetic compatibility - Article 3.1(b) |
|
EN 301 511 V12.5.1 |
Efficient use of radio spectrum - Article 3.2 |
Therefore 
and 
is placed on the product.
Disclaimer:
Test reports that are referenced in declarations and certificates can be provided upon request. For the request to be approved, the recipient of the test reports should be a certification authority or certified test house. The recipients will be asked to sign a non-disclosure agreement (NDA).
Attachments
You can the find PDF version of the EC declaration here.
You can the find PDF version of the UK declaration here.
External links
https://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/red_en
