I select this modem after consult my cable provider 's list of recommend modem . in fact , I just get off the phone with my provider 's tech support , and I confirm what I find when I try to install this modem : if you receive voice telephony service in addition to internet and tv service , this modem will not work . period . there be no phone jack . my cable provider 's website be in error . -lrb- I be tell that there be very few modem that support both cable and telephone . -rrb- do not let this happen to you . Fair warning .