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To use a Polycom phone with FreePBX, you must set-up an Extension in FreePBX using the Extensions Module Module. When you do so, you will select an extension number and password which the phone will use to register to your FreePBX system.
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If you want to make advanced configuration changes or configure a large number of phones, you may find it easier to configure the phones either using the EndPoint Manager Module (a commercial module available for purchase from FreePBX) or by creating your own configuration files in the /tftpboot directory of your FreePBX.
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