Description As the worlds leader in fiber optic networking components Allied Telesyn excels in providing highly reliable, low-cost fiber solutions to its customers. The AT-MR840TF is an eight port unmanaged hub which seamlessly connects 10Base-T workstations to a fiber-optic backbone. The AT-MR840TF can connect as many as eight IEEE 802.3 10Base-T network segments through one unit. Each hub has one uplink (cascading) twisted pair port equipped with a Media Dependent Interface (MDI/MDI-X) crossover switch. As many as four hubs can be cascaded together to form an independent work-group containing as many as 26 nodes. The AT-MR840TF also features one additional port for attachment to the LAN backbone. This uplink is configured with a 10Base-FL fiber port and utilizes the popular "ST" or "SC" fiber connector. This fiber port makes the AT-MR840TF unique by offering the cost-effective advantages of a small unmanaged hub and the high-end capabilities of fiber optic connectivity. The AT-MR840TF features an advanced network load monitor. This series of LEDs, located on the front panel, enable the network manager to get a quick read on the percentage of network utilization. Customers have found this feature to be an excellent way to track and manage network performance. These micro hubs utilize the latest IC and Surface Mount Technology (SMT), which increases functionality and reliability. Additionally, these hubs are small in size, yet they provide the complete functionality of large hubs including packet regeneration and network partitioning. Each segment automatically detects the polarity of the receive pair and reverses should the pair be incorrectly installed. It also includes a partitioning capability where each segment automatically disconnects itself after repeated collisions are detected. 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 AT-MR840TF to aid in troubleshooting and fault isolation. There are two LEDs associated with each twisted pair segment that indicate packet "Receive" and "Link OK" (indicating an operational segment). Additionally, there are three central LEDs indicating "Activity," "Collision" and "Power."
