Specifications.
802.11n dual band, 4x 1x 10/100/1000Mbit/s, 3x 10/100Mbit/s Ethernet ports.
The BT Home Hub 4 is an ADSL2+ modem router with a single Gigabit Ethernet port, three Fast Ethernet ports, a USB port and an RJ11 input that lets you connect the device to your broadband
Thats the router spec if its any consolation.
Phone line and the internet are on 2 different filters.