AT-LMC100SC and AT-LMC100ST Installation Guide
3
Key Features
The media converters have the following key features:
❑
LEDs for unit and port status
❑
MDI/MDI-X selector switch on RJ-45 port
❑
Automatic half- or full-duplex mode operation with 100Base-TX or
100Base-FX fiber optic port
❑
Maximum transmission distance of fiber connection is 2 kilometers at
full-duplex mode
❑
External AC/DC power adapter
❑
Standard size for use in an AT-MCR12 chassis
Status LEDs
Table 2 defines the media converter’s LEDs.
Table 2
Status LEDs
MDI/MDI-X Selector Switch
An RJ-45 port on a 100 Mbps Ethernet network device can have one of two
possible wiring configurations: MDI or MDI-X. The RJ-45 port on a PC, router
or bridge is typically wired as MDI, while the twisted pair port on a switch or
hub is usually MDI-X.
To connect two 100 Mbps network devices together that have dissimilar port
wiring configurations, such as MDI to MDI-X, you use a straight-through
cable. To connect two network devices that have an RJ-45 port with the same
wiring configuration, such as MDI to MDI, you use a crossover cable.
The RJ-45 port on the media converter features an MDI/MDI-X switch. You
can use this switch to configure the twisted pair port on the media converter
as either MDI or MDI-X. This feature allows you to use a straight-through
cable regardless of the type of end-node connected to the port.
LED
State
Color
Description
PWR
ON
Green
Power is applied to the media converter.
ACT
ON
Green
Activities are received and/or transmitted on the port.
LNK
ON
Green
A link has been established on the port.
