General IP ConfigurationSECTION 1 INTRODUCTIONThe NEC SL2100 system uses IP for various applications, including:• System Programming• Voice Over IPThis section describes the procedure for connecting the NEC SL2100 system to an existing datanetwork and configuring TCP/IP. This is the first step in implementing VoIP and other IP applications.SECTION 2 NETWORK ADDRESSING OVERVIEWBefore connecting the system to a data network, it is necessary to obtain the relevant IP Addressinginformation. This information is supplied by the IT Manager or Network Administrator at the customersite.2.1 IP AddressAll equipment/devices used in the LAN setup must have an IP address assignment. An IP addressassigns a unique address for each device. There are two types of IP addresses: Private and Global. APrivate IP address is not accessible through the Internet; a Global IP address can be accessedthrough the Internet.In most cases, a Private address is used, as LAN devices are not usually directly connected to theInternet. Private addresses are usually taken from the following ranges:• Class A 10.0.0.0 ~ 10.255.255.255• Class B 172.16.0.0. ~ 172.31.255.255• Class C 192.168.0.0 ~ 192.168.255.255A Public address is normally only used when a device is directly connected to the Internet. This isunlikely in the case of the equipment. If Public addressing is used, the numbers are normally allocatedby an ISP.2.2 Subnet MaskAs the IP address includes information to identify both the network and the final destination, theSubnet Mask sets apart the network and destination information. The default subnet masks are:• Class A 255.0.0.0• Class B 255.255.0.0• Class C 255.255.255.0The Subnet Mask is made up of four groups of numbers. When a group contains the number 255, therouter ignores or masks that group of numbers in the IP address as it is defining the network locationof the final destination.Networking Manual 4-1General IP Configuration4
