Imibhalo yomthombo yephrojekthi ye-D-Modem ishicilelwe, esebenzisa imodemu yesofthiwe yokuhlela ukudluliswa kwedatha ngamanethiwekhi e-VoIP ngokusekelwe kuphrothokholi ye-SIP. I-D-Modem yenza kube nokwenzeka ukudala isiteshi sokuxhumana nge-VoIP, efana nendlela amamodemu okudayela avamile avumela ngayo idatha ukuthi idluliselwe ngamanethiwekhi ocingo. Izindawo zokufaka isicelo sephrojekthi zihlanganisa ukuxhuma kumanethiwekhi okudayela akhona ngaphandle kokusebenzisa inethiwekhi yocingo ngakolunye uhlangothi, ukuhlela iziteshi zokuxhumana eziyimfihlo, kanye nokwenza ukuhlolwa kokuphepha kwamasistimu afinyeleleka kuphela ngokudayela. Ikhodi yephrojekthi ibhalwe ngolimi C futhi isatshalaliswa ngaphansi kwelayisensi ye-GPLv2.