3Com 3C780 User Guide - Page 64
Connecting to the Dual Ring
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2-24 Installing the Hub PS IO A SP IO B MAC DAS PS IO A SP IO B MAC PP M OI DAC PP M OI PP S IO PP S IO MAC MAC SAS SAS Figure 2-9. Direction of Data Flow Through a Hub and Stations The acronyms used in Figure 2-9 are defined below and described in Chapter 3: s DAS s DAC s SAS Dual attachment station Dual attachment concentrator (hub) Single attachment station Connecting to the Dual Ring To attach the hub to an FDDI dual ring, follow these steps: 1. Install a fiber module in slot 1 on the hub. 2. Insert two fiber-optic cables from the dual ring into the two leftmost ports (B and A) of the fiber module. The fiber-optic cables must terminate in MIC connectors.
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2-24
Installing the Hub
P
I
S
O
S
I
P
O
A
B
MAC
DAS
P
I
S
O
S
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P
O
A
B
DAC
MAC
S
MAC
S
MAC
M
SAS
SAS
P
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P
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M
P
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P
O
P
O
P
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P
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P
I
Figure 2-9.
Direction of Data Flow Through a Hub and Stations
The acronyms used in Figure 2-9 are defined below and described in Chapter 3:
■
DAS
Dual attachment station
■
DAC
Dual attachment concentrator (hub)
■
SAS
Single attachment station
Connecting to the Dual Ring
To attach the hub to an FDDI dual ring, follow these steps:
1.
Install a fiber module in slot 1 on the hub.
2.
Insert two fiber-optic cables from the dual ring into the two leftmost
ports (B and A) of the fiber module.
The fiber-optic cables must terminate in MIC connectors.