AP-RS2000 RTP Proxy Server is an advanced application-aware network device that allows you to resolve private IP problems when private IP terminals are used along with public IP terminals in a call manager (e.g. SIP server) environment. An individual 4-port 10/100 Mbps Fast Ethernet interface and the RS-232C interface for Command Line Interface (CLI) are installed into AP-RS2000, which is available in various IP network environments.

Since the enterprise network environments configured with an SIP server and IP phones require several IP phones, either IP Version 6 or a private IP address in the NAT environment must be supported to the enterprise networks due to the deficient resources of a public IP address. In such a private IP address environment, an RTP proxy server is required for reliable multimedia communications between endpoint terminals.

AP-RS2000 RTP Proxy Server of AddPac Technology is used to make a communication between a private IP terminal and a public IP terminal among endpoint terminals such as IP phones, make a communication between a private IP terminal and a public IP terminal in the NAT environment, make a communication between private IP terminals, make audio/video broadcasting in private IP and public IP environments, and to enable audio/video conference calls in private IP and public IP environments. AP-RS2000 can operate regardless of whether the VoIP signaling protocol is H.323, SIP, or MGCP, and supports dual address systems of IP Version 4 and IP Version 6.

Firmware Upgrade Architecture

AP-RS2000 allows you to adapt to future changes in technologies. If you download an added or changed feature from the home page of AddPac directly or set an automatic upgrade option whenever feature addition or change is done, you can use the latest feature without further operations.

Advanced Network Protocol and QoS Features

AP-RS2000 supports the latest features and advanced service features ranging from the ones (e.g. a variety of network protocols, better Quality of Service (QoS), and the error concealment technology) specialized for an environment for video communications to the Virtual Router Redundancy Protocol (VRRP) service for preventing a failure and load balancing. Accordingly, AP-RS2000 can address various issues that may occur depending on network environments.

Communications Between Private IP Terminal and Public IP Terminal

If AddPac SIP Server and AP-RS2000 have both a private IP address and a public IP address, communications could be made between a private IP terminal and a public IP terminal. For instance, LAN0 of RTP Proxy Server has a public IP address, and LAN1 of RTP Proxy Server has a private IP address. Communications can be made between an IP phone or an IP video phone on the private network and an IP multimedia terminal on the public network through AP-RS2000. AddPac SIP Server and AP-RS2000 can be located between the private network and public network.

If AddPac SIP Server and AP-RS2000 exist on a public network, communications could be made between a private IP terminal and a public IP terminal.

If AddPac SIP Server and AP-RS2000 exist on a public network, communications could be made between private IP terminals in the NAT environment. RTP Proxy Server has a public IP address, and a private IP multimedia terminal is connected to the NAT router. LAN0 of RTP Proxy Server has a public IP address. Communications can be made between an IP terminal connected to the NAT router and the one connected to the other NAT router on the private network through AP-RS2000.

If AddPac SIP Server and AP-RS2000 have both a public IP Version 4 address and a public IP Version 6 address, communications could be made between a public IPv6 terminal and a public IPv4 terminal. For instance, LAN0 of RTP Proxy Server has a public IP Version 6 address, and LAN1 of RTP Proxy Server has a public IP Version 4 address. Communications can be made between an IP multimedia terminal on the IP Version 6 network and the one on the public IP Version 4 network through AP-RS2000. AddPac SIP Server and AP-RS2000 can be located between the IP Version 4 network and IP Version 6 network.

If AddPac SIP Server and AP-RS2000 exist on a public network, RTP broadcast could be made for private IP and public IP terminals. RTP Proxy Server has a public IP address, and a private IP multimedia terminal is connected to the NAT router. LAN0 of RTP Proxy Server has a public IP address. The broadcast devices can enable RTP broadcasting features for the IP terminals connected to the NAT router on the private network as well as for public IP terminals through AP-RS2000. SIP Server can enable broadcasting source terminals and listener terminals through control messages.