Duplex base stations from the RPND series constitute  infrastructure equipment of eDMR digital technology designed and manufactured by TPL Systèmes. At the very heart of the eDMR system base on eDMR  protocol, highly spectrum-efficient RPND duplex base stations are able to provide two audio communications and one data communication at the same time in a 12,5 kHz channel spacing between digital terminals. In networks where analogue and digital terminals coexist, these duplex stations RPND, can also handle communications between analog terminals thanks to their dual mode concept and ensures legacy to analog terminals no matter of occupation slots.(TPL Systèmes patent)

Endowed with their own intelligence through the Simplified Node Centre (CNS) built into the base stations themselves, they are capable of handling various call types, terminal registration/de-registration procedures, alarm and GPS data information as well as controlling various types of interconnections between base and repeater stations.(Microwaves, IP, PSTN)