Allied-telesis AT-8550SP User Manual download pdf (Page 67)

AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide

remote end node. For example, you cannot connect a fiber optic

port with a maximum distance of 2 kilometers and an operating

wavelength of 1310 nm to another fiber optic port that has a

maximum distance of 40 kilometers (24.8 miles) and an operating

wavelength of 1550 nm. For fiber optic ports specifications, refer to

“AT-8516F/SC Fiber Optic Port Specifications” on page 85.

 If your network topology will contain a loop where two or more

network devices can communicate with each other over more than

one data path, do not connect the network cables forming the loop

until after you have activated a spanning tree protocol on the

switch. Data loops can adversely affect network performance. For

information on spanning tree, refer to the AT-S62 Management

Software User’s Guides.

 If you are creating a port trunk, do not connect the cables of the

trunk to the switch until you after have configured the trunk using

the switch’s management software. Connecting the trunk cables to

the switch before you have configured the software will result in a

data loop, which can adversely affect network performance. For

instructions on how to configure a port trunk, refer to the AT-S62

Management Software User’s Guides.

Cabling

Expansion

Modules

If you installed a fiber optic or twisted pair expansion module, stacking

module, GBIC module, or SFP module, connect the data cable to the port

on the module.

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Allied-telesis AT-8550SP User Manual Page 67