| Product Description | | The CentreCOM Micro Hubs are twisted pair hubs intended to connect up to eight IEEE 802.3 10Base-T network segments. In addition to the twisted pair interfaces, an IEEE 802.3 Attachment Unit Interface (AUI) is provided for attachment to other Local Area Network (LAN) media through an external transceiver. With this interface, the hubs can connect directly to different LAN media such as thick or thin coax, fiber optic and twisted pair. The CentreCOM Micro Hubs have no configuration options, permitting easy installation and operation. These micro hubs utilize the latest IC and Surface Mount Technology (SMT), which increase functionality and reliability. The hubs can be used to support standalone workgroup configurations where up to nine devices can be connected, or as a network concentrator for up to eight nodes (AT-MR820T) or four nodes (AT-MR420T) using twisted pair media that desire connection to a LAN backbone. The CentreCOM Micro Hubs are small in size yet they provide the complete functionality of large hubs including packet regeneration and network partitioning. The packet regeneration results in a higher performance network by regenerating preamble, retiming the data packets and extending collision fragments to ensure collision enforcement by all nodes. Each segment automatically detects the polarity of the receive pair and reverses should the pair be incorrectly installed. The IEEE defined link integrity test function continually monitors the receive pair to ensure link continuity. 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 CentreCOM Micro Hubs to aid in troubleshooting and fault isolation. There are two LEDs associated with each twisted pair segment and AUI that indicate packet "Receive" and "Port OK" (indicating an operational segment.) Additionally, there are three central LEDs indicating "Activity," "Collision" and "Power." | | | | General | | Form Factor: | | External | | Dimension: | | 33.3 cm x 11.2 cm x 3.8 cm | | Weight: | | 0.83 kg |
| | | | Networking | | Ports Qty: | | 8 x Ethernet 10Base-T | | Data Transfer Rate: | | 10 Mbps | | Data Link Protocol: | | Ethernet | | Connectivity Technology: | | Wired | | Compliant Standards: | | IEEE 802.3, IEEE 802.3u |
| | | | Expansion / Connectivity | | Interfaces: | | 1 x network - Ethernet 10Base-T - RJ-45 female - 1, 1 x network - Ethernet 10Base-5 - 15 pin D-Sub (AUI) female - 1 |
| | | | Power | | Power Device: | | Power supply - integrated | | Voltage Required: | | AC 110/220 V ( 50/60 Hz ) | | Power Consumption Operational: | | 15 Watt |
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