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Yealink EXP40 Expansion Module Quick User Guide...
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Note: Before installation, be sure to unplug the remote Internet connection and/or power supply as well as the phone stand from the Yealink IP phone. Place the telephone and the expansion module upside down on a soft surface so that you can read nameplates from the front.
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b). Connect to the next module Follow the same steps to connect the next expansion module
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Attach the stand and power adapter. Connect handset and headset to use. d). Configuration The expansion module EXP40 has 40 programmable keys that can be configured via the Star2Star web portal. Each screen displays 20 keys. You may press to switch between the two pages.
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