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As the market leader in unmanaged hubs, Allied Telesis excels in delivering highly reliable, low-cost connectivity solutions to its customers. The AT-RH505BE and ATRH509BE twisted pair micro hubs have been designed specifically to serve small office networks. A single AT-RH505BE and AT-RH509BE hub allow you to create a small network for connecting up to five and nine Personal Computers, respectively. In addition to the twisted pair interfaces (RJ-45), a BNC port provides direct attachment to thin coax media, eliminating the need for an external transceiver. The network can be easily expanded by stacking with another hub.With the BNC interface, up to 30 hubs can be interconnected on a single segment, leaving all UTP ports free for use. The AT-RH505BE and AT-RH509BE utilize the latest IC and Surface Mount Technology (SMT), which increases functionality and reliability. These hubs are very small in size, yet they provide the complete functionality of large hubs including packet regeneration and port partitioning. Each port automatically detects the polarity of the receive pair and reverses should the pair be incorrectly installed. It also includes autopartitioning capabilities, where each port automatically disconnects itself after repeated collisions are detected and automatically reconnects when the error condition is cleared. The rugged metal case has been developed to accommodate the limited space of a typical small office environment. Extremely compact in size, the AT-RH505BE and AT-RH509BE fit conveniently on the corner of a desk. Both hubs include a velcro kit for flexible desktop and wall placement, eliminating the need for installation tools. The hubs support jabber lock-up protection on all interfaces, preventing transceiver lock-up resulting from packets that exceed the maximum packet length. Network diagnostic LEDs are provided on the front of the ATRH505BE and AT-RH509BE to simplify installation, network troubleshooting and fault isolation. An LED is associated with each twisted pair and the thin coax port to monitor status and operation at all times ('Packet Receive' and 'Link OK'). Additionally, there are two central LEDs indicating 'Collision' and 'Power.' The AT-RH505BE and AT-RH509BE are backed by a lifetime warranty and free technical support. As with all Allied Telesis products you can be assured of exceptional quality and extraordinary value from a company with over a decade of networking experience.