Lenovo ThinkPad T550, User Manual

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If you are using a headset with a function switch, do not press this switch while using the headset. If you
press the switch, the headset microphone is disabled, and the integrated microphones on the computer is
enabled instead.
Note: The audio connector does not support a conventional microphone. For more information, see “Using
audio features” on page 39.
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Media-card-reader slot
Your computer has a media-card-reader slot. Insert your flash media card into this slot to read the data
on the card. For more information about the supported cards, see “Using a flash media card or a smart
card” on page 40.
6 Ethernet connector
Connect the computer to a local area network (LAN) with the Ethernet connector.
DANGER
To avoid the risk of electrical shock, do not connect the telephone cable to the Ethernet connector.
You can only connect an Ethernet cable to this connector.
The Ethernet connector has two network status indicators that show the status of the network connection.
When the green indicator is on, the computer is connected to a LAN. When the yellow indicator blinks,
data is being transmitted.
Note: If the computer is connected to a docking station, use the Ethernet connector on the docking station
instead of the one on the computer.
7 Smart-card-reader slot (available on some models)
Some models might have a smart-card-reader slot. Generally, smart cards can be used for authentication,
data storage, and application processing. Smart cards also might provide strong security authentication
for single sign-on (SSO) within large organizations. For more information, see “Using a flash media card
or a smart card” on page 40.
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User Guide