Accton Technology 12i, 12mi SNMP manual Fast EtherHub 3500 System User’s Guide

Fast EtherHub 3500 System User’s Guide

Or attach to the extended network via the SmartExtender Module

The SmartExtender Module can be used to attach to another network device that uses a different media type

10.If an optional SmartExtender Module is installed in the expansion port, it can be used to make a bridged connection from this hub to another network device using 100BASE-TX (10BASE-T), 100BASE-T4 or 100BASE-FX media types. When connecting a node to the expansion port, the maxi- mum cable length is 100 meters for twisted-pair cable, and 2 kilometers for fiber. (Refer to Chapter 2 for a more detailed description of calculating the maximum length permitted for fiber optic cable.)

Attach the SmartExtender Module to a hub, switch, bridge or router

Transmission speed is automatically set for any connection made to the SmartExtender Module

Transmission mode automatically configured for the connected device only if it supports auto-negotiation

Use half duplex for a shared collision domain

You can use the extender module to bridge this hub to another Ethernet or Fast Ethernet hub or stack; or to attach it to a network interconnection device, such as a switch, bridge or router. However, when using the expansion port to cascade to other networking devices outside the stack, note that the maximum cascade length should be limited to 7 devices.

For integrating legacy networks, the 100BASE-TX extender module provides for connection via either 100BASE-TX or 10BASE-T. All 100BASE entender modules use auto-sensing to set the transmission speed at 10 or 100 Mbps. In other words, this module can correctly set the transmission speed for the attached device, even if it does not support auto-negotiation.

The extender modules, except for 100BASE-T4, support both half-duplex and full-duplex communications. However, for this hub to correctly set the transmission mode, the attached device must also support auto-negotiation. If auto-negotiation fails, the transmission mode defaults to half duplex. If this setting is not suitable, then the transmission mode must be manually configured via on-board configuration (Chapter 4) or optional network management software (e.g., AccView/Open).

To reactivate auto-negotiation, just unplug a connection from the port on the hub and plug it in again. Remember that full- duplex mode can only be used for a dedicated link, such as that provided by the SmartExtender Module. When connecting to a shared collision domain (i.e., another hub) set the transmission mode for half duplex.

Quick Installation v