Note that Teltonika routers run the net-snmp agent and can present the net-snmp enterprise ID; if so, configure the following through the router CLI to be identified as Teltonika and to be picked up by this device class:
uci set snmpd.@system[0].sysObjectID=.1.3.6.1.4.1.48690
uci commit
ubus call uci commit '{"config":"snmpd"}'