3Com 10-Port 100BASE-FX Quick Start Manual page 13

10-Port 100BASE-FX and 20-Port 10/100BASE-TX Fast Ethernet Layer 2 Switching Modules Quick Start Guide
Table 6 Mapping the 24-port GEN SFM and the 20-port FEN Switching Module to the 16-slot Chassis
Chassis Number of SFM
Slot Backplane Ports
Number Allocated to Slot
1 2
2 2
3 2
4 2
5 2
6 2
7 2
8 Reserved for an SFM Not applicable
9 Reserved for an SFM Not applicable
10 2
11 2
12 2
13 1
14 1
15 1
16 1
20-port Switching SFM Backplane Port
Module Backplane Numbers Assigned to
Port Numbers Chassis Slot
21 1
22 2
21 3
22 4
21 5
22 6
21 7
22 8
21 9
22 10
21 11
22 12
21 13
22 14
Not applicable
Not applicable
21 15
22 16
21 17
22 18
21 19
22 20
21 21
21 22
21 23
21 24
SFM LED Numbers
Assigned to Backplane
Port Numbers
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Not applicable
Not applicable
15
16
17
18
19
20
21
22
23
24
13