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Fast EtherHub 3500 System User’s Guide
Product Overview 1-7
• Firmware update supported for the Fast EtherHub-12mi
models via out-of-band Xmodem file transfer through the
serial port, or in-band TFTP file transfer over the network
Networking Flexibility
(via SmartExtender Modules)
• One slot supports optional slide-in network extender
modules for connection to 10BASE-T, 100BASE-TX,
100BASE-T4 or 100BASE-FX (on a separate segment)
• Transparent bridging (between stack and external device) via
optional network extender modules
• Uses adaptive cut-through switching (which dynamically
changes between fragment free cut-through and store-and-
forward depending on the CRC error rate)
• 100BASE-TX SmartExtender module automatically senses
transmission speed (at 100 Mbps or 10 Mbps)
• 100BASE-TX and 100BASE-FX SmartExtender modules
support two interface modes: full duplex or half duplex —
auto-negotiates transmission mode for full duplex and half
duplex (if same feature is supported by attached device);
otherwise can be manually configured
• Automatically learns MAC addresses to build the routing
information database
• Automatically filters local traffic
• Transparent to all higher level protocols
Easy Installation
• Flexible installation for desktop or rack (standard 19” size)
• Plug-and-play
• Self-diagnostics
• Automatic polarity detection and correction permits
automatic recovery due to wiring errors
• Automatic ID assignment and auto-terminator setting for
auto-configuration