Possibly you got to many phones or power been drawn off the phone line?
Phones have different ratings as do routers.
Wirless phones are umm an interesting thing im no expert on the various types. But it maybe worth plugging in the old phone just to check.
We always think all products we buy in shops will work perfect out of the box but its rarely true.
A quick google and the orange forum has problems with dect phones and live boxs
http://forums.orange.co.uk/n/pfx/for...ernet&tid=3949
heres a bt troubleshooting guide
http://www2.bt.com/static/i/media/pdf/repair_guide.pdf
does this help or sound familair?
http://www.digitalspy.co.uk/forums/s...php?p=22182428
Ps to all i have read some scary things about some dect phones which regardless of where the phone is in relation to the base station it blasts out a radio signal all the time. Do not have one near where you sleep or spend a lot of time is what many people who know better than me advise me.
Nothing proven, but many people are cautious as basically its a weak microwave signal emitted very near to you.
That or ensure its a phone which controls the time when it emits a radio signal.