Samsung Officeserv 7100 Technical Manual

Also see for OFFICESERV 7100: Quick guide System administration guide User guide User manual User guide

Contents

OfficeServ 7100 SPECIAL APPLICATIONSTECHNICAL MANUAL PART 2 JANUARY 20092.6.17In the OfficeServ 7100 “public” and “private” do not necessarily actually mean publicand private. These are relational terms to determine if the MP10/MP10a must look atsource IP addresses and convert to a destination address. This is done when there aretwo different networks. As an example, if all the IP addresses are exposed to the“public” unprotected Internet network. The programming for the MP10/MP10a, MGI,and ITP keyphones would be programmed as private. They are all on the samenetwork.If the MP10/MP10a, MGI and several ITP keyphones were on a LAN based “private”,protected network, behind a router and the Internet IP address was in front of the routerand “exposed” to the public Internet the programming for the MP10/MP10a, MGI andlocal ITP keyphones would be private. In this case the MP10/MP10a, MGI and remoteITP keyphone would also have public IP entries to show the external Internet addressesfor translation to the internal Intranet. This external public entry address allows theMP10/MP10a to convert the external IP address to the internal private addresses.Customer Provided RoutersExposure of the private network to the public can compromise the security of theprivate network. To use the Private with Public relationship the networks are usuallyseparated by a router and/or firewall. The routers used MUST be able to support“reservations” or “port forwarding” feature. The Reservations feature in routers allowsthe router to “reserve” an internal IP address to be permanently connected orforwarded to an external IP address. This permits packets sent to and from the externalIP address to be sent to the internal IP address. Different router manufacturer’s supportvarying numbers of reservations or port forwarding. Without this feature in thecustomer supplied router the OfficeServ 7100 Private with Public IP addressing will notfunction and all address must then be exposed to the public network. A routersupporting this feature permits the iDCS VoIP features while also allowing the customerto access the public Internet from their LAN based PC’s (separate IP address required).In most applications the equipment supporting reservations would be located at theOfficeServ 7100 system side. The remote location can have a either a public static IPaddress for each ITP keyphone, a NAT supporting router with a single public IPaddress with multiple ITP keyphones.