RTU DNP3 Communication to Multiple MTU's

Dear Experts,
We have application requirement for SCADA monitoring with Existing RTU's plus existing MTU configuration via DNP3 Wireless communication.

RTU make is SMAR DI302 system. Currently RTU's are communicating to MTU's for SCADA are existing.

so in parallel new MTU's shall communicate with Existing RTU's via DNP3? could you please anybody share experience RTU's will support for multiple master terminal units for SCADA application.

Thanks & Regards
Krishna