Yealink SIP-T2 SERIES Administrator's Manual page 954

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
If your IP phone does not boot, check if the provisioning server is accessible on the
network and a valid software firmware and valid configuration files are available. Try to
use recovery mode to get your phone ready. For more information on recovery mode,
Recovery Mode on Yealink IP phones
refer to
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The USB port of Yealink IP phone has a limit current of 500 ~ 700mA. Make sure that the
device is USB flash drive or mobile hard disk with low power.
If there is no volume sending from the speaker or sending volume is too low, the

Hands-free MIC cable may not have been properly connected.
If there is no volume receiving from the speaker or receiving volume is too low, the

speaker cable may not have been properly connected.
Ensure that the headset or handset is not damaged. If the headset or handset is usable,
it may be the codec problem on the mainboard.
Do one of the following:
Ensure that the keypad cables is properly connected and not damaged.

Check if the keypad surface is clean.

Do one of the following:
Ensure that the FPC of the touch screen is properly connected.

Check if the touch screen is damaged.

932
the Yealink logo
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