Thousand Oaks-based Xirrus is expanding its product line today, saying that it has launched a new, chassis based modular wireless switch. The firm, which develops switched WiFi hardware which is particularly useful in dense environments or where users need better bandwidth and performance, said its new XR-Series Wireless Arrays allow users to add modules to grow their wireless networks over time. The firm said the platform allows users to upgrade radios to higher speeds, scale out radios as needed, supporting up to 32 radios in the entire platform. Xirrus also said it expects the chassis to support new wireless technology when it is introduced. Pricing on the new chassis product was not announced.