further, if internet only service, why would they install a splitter at all??
incoming cable should just go directly to the modem, shouldn't it?
Around here, for Internet + TV they also used a 3 way splitter with the modem connected to the -3.5 dB down port,
and the TVs to the -7 dB down port. Later, when I got my own modem, I put my own 4 way splitter in instead,
and ran two modems (mine for data plus theirs for voice) and two TVs, so all are equal -7 dB down now.
DB4E/VHF Yagi rotor FM Bandstop ap-8700 preamp 4way split LG lcd.