Public And Private Ip Connectivity - Samsung Officeserv 7100 Technical Manual

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OfficeServ 7100 SPECIAL APPLICATIONS
TECHNICAL MANUAL PART 2 JANUARY 2009

Public and Private IP Connectivity

The MP10/MP10a, MGI and ITP keyphones can be used on the private Intranet
LAN/WAN and also have a public Internet presence. This is accomplished by defining
the public address on the MP10/MP10a and MGI cards. ITP keyphones can also be
registered as public IP addresses but still communicate with the private network
stations and system. Figure 7 shows the relationship between public and private
networks.
In any case with Public network exposure there must be a public address for the
MP10/MP10a and each MGI that will connect to the Public network. The remote ITP
must have at least one public IP address available. When using a NAT router at the
remote ITP end there only needs to be one public IP address.
Figure 7. Public and Private Networks
Private Network Public Network
Router
ISP
Internet
ISP
"Public" networks can be defined as a network that is open to the public Internet.
Anyone with access to the Internet can access the endpoint(s) via an IP address. This
endpoint can be a server, email server, PC or router.
"Private" network is the network that has an IP addressing scheme that is used behind
a router to protect the user endpoints from being accessed by the public. In some
cases the router has a "NAT" (Network Address Translation) setting. This allows the
user(s) behind the NAT router to look as a single address to the public network.
2.6.16