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How to setup DHCP for IP Phone

If you would like to setup IP Phone using dynamic IP and synchronize time with your time server, you may need to configure the DHCP Option 156 for IP phone and 042 for NTP or 004 for time server.

To use Option 156, you need to predefine the option. The following case based on USA and STP server IP is To set predefine IP phone option, open HDCP. Right-click on the DHCP server and select Set Predefined Options. Click Add. Type IP Phone as name, select String from the Data type, and 156 as Code. Click OK to save it. On the String Value, type ftpservers=, country=1, language=1.

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