Nortel Networks 24T manual Table B-2 BASE-FX MDA Components, Label Description

Media Dependent Adapters

Both models conform to the IEEE 802.3u 100BASE-FXstandard and can be used to attach fiber-based 100 Mb/s connections to other compatible Fast Ethernet devices. Single-mode fiber cable is not supported.

Table B-2 describes the 100BASE-FX components and LEDs.

For installation instructions, see “Installing an MDA” on page B-6.

Table B-2. 100BASE-FX MDA Components

Item	Label	Description
1	Link	Communications link LEDs (green):
		On: Valid communications link established.
		Off: The communications link connection is bad or there is no connection to this
		port.
		Blinking: The corresponding port is management disabled.
2	F Dx	Full-duplex port status LEDs (green):
		On: The corresponding port is in full-duplex mode.
		Off: The corresponding port is in half-duplex mode.
3	Activity	Port activity LEDs (green):
		Blinking: Indicates the network activity level for the corresponding port. A high
		level of network activity can cause LEDs to appear to be on continuously.
4		100BASE-FX port connectors:
		• Model 400-2FX uses SC connectors.
		• Model 400-4FX uses MT-RJ connectors.

309985-B Rev 00 B-5