Hello,
I am thinking of changing my ISP , but the new modem is a special type where
the telephone also plugs into the modem. The new modem only has one eth
port.
My current modem/router is a Alcatel speedtouch pro 4 port and I have 3 pc
connected.

Can I just connect the spare port to the new modem and not use the modem bit
on the Speedtouch? What config would I need?

There is a configurable routing table on the Speedtouch, Is it just a matter
of adding in the new modems gateway? Would I need a crossover lan cable or
an ordinary one?