Zycoo CooVox-U80 User Manual page 86

If DHCP is selected then the WAN interface will not be configurable as it obtains all its network
parameters from the DHCP server. DHCP should be used cautiously asallIP extensions registerto
the IPPBX system through the WAN interface and as DHCP addresses can change and IP
extensions need to know the address of the IPPBX at all times. It is best practice to configure
WAN address with a Static IP.
PPPoE
CooVox IPPBX can be connected to the network via ADSL modem by means of Point‐to‐Point
Protocol over Ethernet (PPPoE)dial‐up. In such a situation, extensions will subscribe to the IPPBX
system through the LAN port, while WAN port can be used for remote extensions.
If PPPoE is set, you have to specify the username and password given by your ISP and the IPPBX
system will dial‐up to the ISP and once successfully connected, you will have Internet access on