3Com 5000 quick start Fddi SwitchModules Front Panel Features, Port Status LED State Indicates

14COREBUILDER® 5000 SWITCHMODULE QUICK START AND REFERENCE

15.0FDDI SwitchModules Front Panel Features

This section describes the FDDI ports and LEDs on the following SwitchModules:

MIC
connectors	FDDI Port Status LEDs

■2-Port FDDI SwitchModule

■12-Port FDDI Concentrator SwitchModule

See Section 10.0 for a description of the PacketChannel LED, Module Status LED, and Reset button.

15.1 LEDs

FDDI LEDs are green only (not yellow). The following table explains the FDDI port status LED blink sequences:

Port Status LED State	Indicates
Green On	Port is enabled and ring is operational.
Green Blinking	Port is connecting.
Off	Port or port functions are disabled.

15.2 Ports

FDDI SwitchModules support the following port configurations:

■2-Port FDDI SwitchModule — Supports 2 DAS (A/B) ports with MIC connectors.

■12-Port FDDI Concentrator SwitchModule — Supports 2 DAS (A/B) ports and 8 Master (M) ports with

MIC connectors. Each side of the FDDI Concentrator SwitchModule is a Dual Attachment Concentrator (DAC), which is composed of 4 M ports and an A and B port pair that is connected to a single MAC.

15.3 Optical Bypass Connector

1A	1B
2A	2B

1A

1B

OPTICAL

BYPASS 1

2A

2B

OPTICAL

BYPASS 2

6604M-F-A

1A	1B	2A	2B
1M	2M	1M	2M
3M	4M	3M	4M
1A			2A
1B			2B
1-			2-
1M			1M
1-			2-
2M			2M
	OPTICAL		OPTICAL
	BYPASS		BYPASS
1-			2-
3M			3M
1-			2-
4M			4M

6612M-FC-A

FDDI SwitchModules support one optical bypass connector per port. Use the optical bypass connector to preserve a dual FDDI ring in the event of a station failure. The optical bypass connector accepts an optical bypass switch of type AMP FOTP-34 Method B using a mini-DIN connector.

2-Port FDDI	12-Port FDDI
SwitchModule	Concentrator
Model Number	SwitchModule
3C96604M-F-A	Model Number
	3C96612M-FC-A