3Com 10/100BASE-TX, 100BASE-FX quick start Up to 2 can be Accessed by this Module

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1210-Port 100BASE-FX and 20-Port 10/100BASE-TX Fast Ethernet Layer 2 Switching Modules Quick Start Guide

Table 5 Mapping the 24-port GEN SFM and the 20-port FEN Switching Module to the 8-slot Chassis

Chassis	Number of SFM	20-port Switching	SFM Backplane Port	SFM LED Numbers
Slot	Backplane Ports	Module Backplane	Numbers Assigned to	Assigned to Backplane
Number	Allocated to Slot	Port Numbers	Chassis Slot	Port Numbers

1	4; up to 2 can be	21	1	1
	accessed by this	22	2	2
	module	22	2	2
	module

2	4; up to 2 can be	21	5	3
	accessed by this	22	6	4
	module	22	6	4
	module

3	4; up to 2 can be	21	9	5
	accessed by this	22	10	6
	module	22	10	6
	module

4	4; up to 2 can be	21	13	7
	accessed by this	22	14	8
	module	22	14	8
	module

5	4; up to 2 can be	21	17	9
	accessed by this	22	18	10
	module	22	18	10
	module

6	4; up to 2 can be	21	21	11
	accessed by this	22	22	12
	module	22	22	12
	module

7	Reserved for an SFM	Not applicable	Not applicable	Not applicable

8	Reserved for an SFM	Not applicable	Not applicable	Not applicable

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Contents For the CoreBuilder 9000 Enterprise Switch Port 100BASE-FX100BASE-FX Class LED Product ESD Safety Information Instructions Installation Prerequisites Page Up to 2 can be Accessed by this Module Up to 2 can be Accessed by this Module Not applicable Up to 2 can be Accessed by this Module Up to 2 can be Accessed by this Module Not applicable Reserved for an SFM Not applicable Reserved for an SFM Not applicable Page Spring-loaded Screws Spring-loaded Screw Page LED Administration Console Web ManagementPhysical Specifications Power SpecificationsCabling Requirements Environmental RequirementsSafety Emissions Related CoreBuilder Documents Regulatory ComplianceCoreBuilder 9000 Documentation CD-ROM 3Com Corporation Limited Warranty Warranties Exclusive Emissions Compliance Statements for Class a Products 3Com Corporation 5400 Bayfront Plaza Santa Clara, California