Section 1 Introduction - NEC Sl2100 Networking Manual

General IP Configuration
S 1 INTRODUCTION
ECTION
The NEC SL2100 system uses IP for various applications, including:
• System Programming
• Voice Over IP
This section describes the procedure for connecting the NEC SL2100 system to an existing data
network and configuring TCP/IP. This is the first step in implementing VoIP and other IP applications.
S 2 NETWORK ADDRESSING OVERVIEW
ECTION
Before connecting the system to a data network, it is necessary to obtain the relevant IP Addressing
information. This information is supplied by the IT Manager or Network Administrator at the customer
site.
2.1 IP Address
All equipment/devices used in the LAN setup must have an IP address assignment. An IP address
assigns a unique address for each device. There are two types of IP addresses: Private and Global. A
Private IP address is not accessible through the Internet; a Global IP address can be accessed
through the Internet.
In most cases, a Private address is used, as LAN devices are not usually directly connected to the
Internet. 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 ~ 192.168.255.255
A Public address is normally only used when a device is directly connected to the Internet. This is
unlikely in the case of the equipment. If Public addressing is used, the numbers are normally allocated
by an ISP.
2.2 Subnet Mask
As the IP address includes information to identify both the network and the final destination, the
Subnet 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 255.255.255.0
The Subnet Mask is made up of four groups of numbers. When a group contains the number 255, the
router ignores or masks that group of numbers in the IP address as it is defining the network location
of the final destination.
Networking Manual
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