Ooma Office is compatible with many peripheral devices. Some, such as new analog telephones and physical fax machines, can be purchased from the electronics retailer of your chose. Others, including IP telephones, expansion Ooma Office Base Stations, and Ooma Linx devices, must be purchased directly through Ooma.
You can see a list of our recommended analog devices here. You can also browse the IP phones and other devices that are available from Ooma by logging into office.ooma.com as an administrator and navigating to the Store tab.