Allied-telesis AT-8550SP User Manual download pdf (Page 26)

Overview

GBIC and SFP Expansion Slots

The AT-8550GB and AT-8550SP switches have two GBIC expansion slots

and two SFP expansion slots, respectively. The slots are labelled Port 49

and Port 50. Each slot can accommodate one optional fiber optic Gigabit

Interface Converter (GBIC) Ethernet module or Small Form-factor

Pluggable (SPF) module, also referred to as a mini-GBIC.

These modules are a fast and easy way for you to add an 1000 Mbps fiber

optic port to your Fast Ethernet switch. You can use the modules to

extend the distance of your network, build a high-speed backbone

network between switches, or connect additional end nodes to the

network, such as high-speed servers.

Figure 6 shows an example of a fiber optic GBIC module.

Figure 6 GBIC Module

When you install a GBIC or SFP module in Port 49 or Port 50 and the

module establishes a link with its end node, the corresponding twisted

pair port, Port 49R or 50R, changes to a redundant status. A link on a

GBIC or SFP port always takes precedence over that of the

corresponding 10/100/1000Base-T twisted pair port.

Note

For a list of the GBIC and SFP modules supported by the AT-8550GB

and AT-8550SP switches, contact your Allied Telesyn sales

representative or refer to our web site at: www.alliedtelesyn.com.

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Allied-telesis AT-8550SP User Manual Page 26