Product Description
6
Configuration Switch
The AT-MS203 Micro Switch provides an externally accessible Configuration
Switch to select operating speed (10Mbps or 100Mbps) and duplex mode (half
or full), making it suitable for switching between 10 and 10, 10 and 100, or 100
and 100 Mbps networks, as needed.
Use the Configuration (DIP) switch to manually configure the speed and duplex
mode for each port. The DIP switch should be set as shown in the following:
Full Duplex Configuration
Configure only one port on the AT-MS203 to full duplex when connecting to a
single workstation or to another switch. Since AT-MS203 does not have auto-
negotiation, also make sure to configure the device at the other end to full
duplex or else you may see transmission difficulties.
When connecting to a hub or repeater, you must set the port to half duplex since
this is a shared Ethernet Carrier-Sense Multiple Access with Collision
Detection (CSMA/CD) environment because when set to full duplex, collision
detection is disabled.
RESET Button
You must press the RESET button any time you change the configuration of the
switch. For example, when you change the operating speed from 10 to 100, you
must reset the switch to load the new parameters. The RESET also clears all
receive buffers, MAC address tables and restarts the self-address learning
mechanism. Powering the unit off and on is equivalent to the RESET button.
AC Power Connector
AT-MS203 Micro Switch has an internal AC universal power supply rated at
100 to 240 VAC, 50/60 Hz. Allied Telesyn provides different power cords based
on the requirements of different countries.
DUPLEX MODE
SPEED (Mbps)
Up = Half Duplex
Up = 10 Mbps
Down = Full Duplex
Down = 100 Mbps
