Cisco C926 User Manual page 42

When switch DHCP, Static IP and PPPoE to each other, or change the Static IP on webpage, it will show the warning of restart as following.
IPv4
If you set IP Mode to IPv4,IP phone will use IPv4 address. IPv4 has three network modes: DHCP, Static, and PPPoE
To configure IPv4 via Phone interface:
1. Press Menu Settings Advanced Setting (password: admin) Network WAN Port IP Port Mode.
2. Press or to change the IP Port Mode..
3. Press or Save soft key to save the configuration.
To configure IPv4 via Web interface:
1. Click Network Basic Internet Port
2. Select IPv4 for Internet Port
3. Click for the setting.
To configure DHCP via Phone interface:
1. Press Menu Settings Advanced Setting (password: admin) Network WAN Port IPv4 DHCP mode.
2. Click Save and restart the phone.
To configure a static IP address via Phone interface:
1. Press Menu Settings Advanced Setting (password: admin) Network WAN Port IPv4 Static mode.
2. Enter the parameters: IP, Netmask, Gateway, Pri.DNS(primary DNS), Sec.DNS (second DNS) in the corresponding fields.