Comment by Lio
Are you sure about that? My understanding was that the eCall self test does not connect to a network.
That’s stated on the eCall page linked above. Do you have a source that contradicts that?
Are you sure about that? My understanding was that the eCall self test does not connect to a network.
That’s stated on the eCall page linked above. Do you have a source that contradicts that?
Does that mean the modem used for eCall is the same that is used to transmit telemetry? Because that's a level of shitty I hadn't even considered. That said, it would go against the spirit of the law as I read it.
There are always workarounds, of course, but that does pose an annoying problem to patch.
Yes, unfortunately in all modern calls there's a single Telematics Control Unit with a modem, GPS/GNSS, eCall (where required) and whatever OEM telemetry stack.
Like you say, there are always workarounds, but none that the home-gamer can safely or legally modify without taking eCall out of compliance.
There are standalone eCall units for retrofitting, e.g. [1] and likely soon more since 2G/3G gets phased out. Presumably you could disable the manufacturer’s built-in system and use standalone system instead?
[1] https://www.bosch-presse.de/pressportal/de/en/emergency-call...
Yes, I am sure.
Annex VII only rules out connecting to the PSAP/112 side, not routine network attaches. To detect faults in the “means of communication”, the IVS has to verify that the SIM, baseband and RF path are actually usable, and you can’t test that without a network attach.
In practice that’s what all current eCall implementations do. The modem attaches to the cellular network at each ignition so it can confirm it’s capable of placing an eCall. If you block the modem or antenna, the IVS fails its self-test and the vehicle is no longer roadworthy.