We operate 10,000 vehicles equipped with Teltonika FMC880 devices and intend to migrate to a different telematics platform without physically removing or replacing the trackers. Can the new platform configure the existing FMC880 devices remotely so they communicate with the new system?
You can use SMS commands to change configuration parameters: FMC880 SMS/GPRS Commands - Teltonika Telematics Wiki
The parameter IDs are here: Template:FMB Device Family Parameter list - Teltonika Telematics Wiki
In your case the required parameters are: 2004 (server), 2005 (port), 2006 (protocol), 2020 (TLS)