This read-create IpAddress object is the default gateway for the CPE, writable by the NMS only when the IP was obtained in static mode, and read-only otherwise. An admin only needs to set this manually for statically addressed lines, since a DHCP-obtained address populates the gateway automatically. For example, on a statically configured business line, the technician sets cpeIpGateway to the ISP's edge router address after assigning the static IP.