9033060 ProductOverview 7
Rear Panel
Figure1-4 shows the ELH100-12/24TX rear panel and Table 1-4 defines
therear panel components.
Figure1-4. ELH100-12/24TX Rear Panel
Table1-4. Rear Panel Components
Feature Summaries
Thefollowing summaries describe ELH100-12/24TX features in areas
suchas standards compliance, functionality, performance, and options.

Dual-Speed Architecture

TheELH100-12/24TX hub provides both 10 and 100 Mbps repeater
buses.The speed of the device connected to each port is automatically
detectedby the hub, and the port attached to the appropriate bus. Up to
6hubs can be sta cked together to form a dual-speed netwo rk. An optional
switch/mediamodule can be addedto any hub in the stack to bridge traffic
betweenthe 10 Mbps and 100 Mbps repeater buses as required.

Software Download

TheELH100-12/24TX hubs support the industry-standard Trivial File
TransferProtocol (TFTP) for downloading agent software. All hub
softwareis stored in a 2 MB flash ROM. The downloadfeature allows you
toeasily install software upgrades to the Agent Module. Software can
alternativelybe downloaded via the serial console port using the
XMODEM protocol. You can download to permanent flash ROM, or you
candownload to temporary storage in RAM for test purposes.
Name Function
PowerConnector ProvidesAC power to the switch.
RedundantPower
Connector Thisconnector is providedfor a redundant power unit
(RPU)which can su pply power to the hub if its primary
powersupply fails. (Refer to the m anual provided with
theRPU for further details.)
StackConnectors Allowsyou to stack up to 6 units to form a dual-speed
networkof up to 14 4 ports.