cryopathy - destruction of tissue by freezing and characterized by tingling, blistering and possibly gangrene. harm, hurt, injury, trauma - any physical damage to the body caused by violence or accident or fracture etc.
One of the ports on the switch would go to one of the router ports on the wireless router and then another cable would go from the wireless router to the computer that is normally part of the switch. The key step is to turn off the DHCP server. The WAN port on the router is not used in this instance. Hope that helps.
If your modem does not include the features listed above, you will most likely need to buy a separate wireless router and connect it to your modem. However, it may be worth contacting your ISP to ask them if they can provide you will a new modem/router free of charge.