Most wireless routers conflict with yur modem if not properly configured. Its should have been pre-configured to work with the Zhone modem where you bought it. Take it back and ask them to configure it so it don't conflict with your LAN modem, they should have the settings.
LAPTOP:- Alienware M11x C2D @1.7GHz, SATA 300GB HDD, nVidia GT 335M 1GB (dis.), Intel GMA HD-64MB (int.), 2GB DDR3 RAM @1066MHz, 1.3MP webcam Running Windows7 64bit
MOBILE DEVICE:- SGS3 T999 dual core Qualcom Snapdragon @1.5GHz, 2GB RAM, 16GB (int. SD), Adreno 225 GPU, 8MP pri. cam, 1.9MP ff running Stock:4.0.4 UVLH2 modem