Many Internet Service Providers (ISP's) such as telephone and cable companies now provide you with an all-in-one device that is both a modem and a wireless router. That might seem very convenient, and it is, but performance and features are often several levels below what you can get with your own wireless router. If your home or office is large, or if you have a lot of users connecting simultaneously, buying your own router may substantially improve the speed and reliability of the Internet connection for all of your devices.
A recent article on choosing the best router for your home is also applicable to many solo and small firm law offices. Depending on the layout of your office, the number of devices needing Internet access, and the amount of data received and sent, the ISP-supplied modem/router may be inadequate, resulting in slow access and dropped connections. Buying the right higher-end wireless router can greatly improve performance and reliability. Your router will connect to the ISP-supplied device, but will use only the modem capabilities of that device.
Unfortunately, this is not "plug and play." You will need to work with your ISP to have them switch their device to what is commonly called "bridge mode" in order to connect your wireless router and let it handle all of the network routing for both wired and wireless devices. Many ISP techs are not familiar with this process, so you often have to ask for advanced tech support team when you call your ISP.