Rf solutions kappa m868 modem data modules rf solutions kappa m868 so this smt kappa modem module from rf solutions is a highly integrated rf modem and intelligent controller with an ultra simple sil connection footprint the kappa modem module can achieve a wireless serial data link at up to 57k6bps over a 500m range its range may be further extended with a suitable antennathe user interface is standard rs232 operating at low voltage all rf operation is automatically controlled with erro