When you subscribe to the high-speed Internet access from Comcast, then you will receive the normal cable modem with the ports for Ethernet cables. If you need to set up the wireless network in the home office, you should purchase the separate wireless router. Then, you are able to configure a wireless router in order to connect to the modem and will also create the local wireless network.
To help you more, here is information for you. You can follow some easy steps in order to configure the router with the Comcast cable modem. By reading the following information, you will get what you really need.
For the first step, you have to make sure that the Comcast cable modem is already powered and receiving the active normal signal. Normally, the modem will receive a signal if the data light flashes. You need to be sure that it already flashes.
For the second step, plug one end of the standard Ethernet cable into an output port on the back of your modem. After that, you can connect another end of the cable to the wireless port on the wireless router. Your router must not be powered on yet.
After that, you need to plug the router into the adapter in order to turn on the device. Then, you have to use your pen or other devices with the sharp point in pressing the "reset" button on the back of a Comcast modem. This will reboot and also start communicating with your wireless router. Your router will accept the Internet signal from the modem and also create the wireless network.