Yealink SIP-T2 SERIES Administrator's Manual page 55

To connect the extension microphones:
1) Connect the free end of the optional extension microphone cable to one of the MIC
ports on the phone.
You can connect a USB flash drive to record and play back calls. For SIP VP-T49G IP
phones, you can also connect a USB flash drive to display pictures on your phone and
capture screenshots.
To connect a USB flash drive:
1) Insert a USB flash drive into the USB port on the phone.
For SIP VP-T49G:
Getting Started
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