This 3-foot (1-meter) SMA coaxial cable adapter is used to attach an external antenna to the 3Com 11Mbps Wireless LAN Workgroup Bridge (3CRWE83096A). A 3Com 6-Foot Antenna Cable (3CWE480) is required with this product: the cable serves as the connection between the cable adapter and the external antenna. The cable adapter must be installed by a professional technician or installer.The cable adapter requires 3Com 11Mbps Wireless LAN Workgroup Bridge firmware version 1.5 or newer to operate. The firmware can be downloaded for free from the 3Com web site product support page.