When your CP960 phone is initially powered on it will automatically attempt to obtain a local DHCP network settings (e.g., IP address, subnet mask, default gateway address and DNS address).
If your phone is using a Wi-Fi network you need to make sure that Wi-Fi is enabled and connected properly before network settings can be obtained. See more information here.
Static IP vs DHCP
If the automatic connection fails or if your network does not use DHCP you will have to configure the network settings manually with a static IP address. This can be done directly from the phone user interface. Switching back to DHCP is also possible from the web user interface.
Generally speaking, DHCP is more secure than a static IP address since the IP address is constantly changing. There are, however, certain situations where you would need to know the specific IP address of a phone (for example configuring constant network or firewall settings for the phone) making a static IP a more functional choice.
Contact your network or IT administrator to find out the required network values (IP address, subnet mask, default gateway address, and DNS address). The phone supports both the IPv4 and IPv6 address formats (IPv4 is enabled by default.)
Phone User Interface Configuration
With the phone user interface, you can configure a Static IP address or switch a static IP back to DHCP.
To configure the IP address mode and network settings:
Tap Settings ( ) on the home screen and navigate to Advanced Settings>Network>WAN Port.
If prompted for a password enter "admin" or the current administrator password.
Select IPv4, IPv6 or IPv4 & IPv6 from theIP Mode field.
Based on your selection you can now tap the IPv4 or IPv6 field and select Static IP.
Enter the desired values IP Address, Subnet Mask, Gateway,Primary DNS, and Secondary DNS values respectively.
For IPv6 mode you can also enter the relevant IPv6 Prefix value.
To switch to DHCP repeat the above but select DHCP in theIPv4 orIPv6 field.
Web User Interface Configuration
Configuration via the web user interface is only possible if your phone has previously been able to obtain an IP address automatically or by a provisioning process. It is useful for switching between DHCP and Static IP modes.
To configure the network via the web user interface:
Select the Network tab on the top and the Basic options from the side.
Depending on the addressing format of your network, you can select or change the Mode (IPv4/IPv6)option to either IPv4,IPv6, or IPv4 & IPv6.
If a static IP is already configured and you want to switch to DHCP, select DHCPunder the IPv4 Config or IPv6 Config section.
If DHCP is selected and you want to set up a static IP instead:
Depending on your selection in the Mode IPv4/IPv6 field, select Static IP Address under the IPv4 Config orIPv6 Config section.
Enter theIP Address, Subnet Mask,Default Gateway, Primary DNS, and Secondary DNS values respectively.
If your company doesn't use a private DNS, Google’s public DNS server (address 126.96.36.199) is a popular choice for the primary DNS, but there are plenty of other options that might work faster for you. The secondary DNS is optional.
You can also use a dynamic DNS by selecting OFF in the Static DNSfield.
A Dynamic DNS lets you use an easy to remember "static" domain name even when DHCP is enabled. It can be helpful if a static IP is not available to you but it does require you to register with a DDNS provider before you can use it.