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Acer 700 Series User Manual
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|  1-5 AcerRouter 700 Series User GuideAcerVoIp system does not support fax over the Internet.When data is sent over a congested and unpredictable public network such as theInternet, it may encounter variable delays and data loss. For time insensitive data, thisis acceptable, since delay does not do any harm, and the application software willrecover from any data loss by requesting the sender to re-send any lost data.However, this is not the case with time-sensitive data such as voice traffic. Extremecare has to be taken to make sure that the quality of voice traffic through the Internetdoes not suffer much due to delays through the network. On the other hand, there willstill be times when no matter what is done, the quality of voice over the Internet cannot compare to the quality of voice calls through the standard PSTN network.However, AcerRouters continue to be at the forefront of this type of Internet voicetechnology.The AcerRouter 700 maintains a convenient SpeedDial table in which shortcuts canbe configured either for conventional calls, or for AcerVoIp calls. These shortcuts arefrom one to eight digits in length. Thus, an out-going call may be placedconventionally through the ISDN/PSTN or across the Internet in a seamless manner.Additionally, the AcerVoIp offers a FallBack feature: AcerVoIp entries in theSpeedDial table can be configured to make a standard PSTN call in case the calledpart cannot be reached through the Internet. This called Fallback. This is so that thecaller’s dialing habits are not changed, making the feature easy and familiar to theuser.Creating a Virtual Private Network (VPN)Virtual Private Networking (VPN) provides a means to connect remote LANs overpublic networks such as the Internet. This means that only local toll charges to anInternet Service Provider are incurred. The data can be encrypted to preventunauthorized access.In order to accomplish this, a special connection is first set up between the two sites,called "tunnel". Once a tunnel is set up, one or more user data sessions may beestablished which flows through the tunnel.In the AcerRouter, tunnels are created over the Internet. They are configured in amanner similar to a telephone line. It is not necessary to require authentication whencreating a tunnel, since no sensitive data will be transferred until a user connection isestablished. Therefore, authentication information is normally associated with theconnection profile for the user data session using the tunnel.Figure 1-6 Creating a Virtual Private NetworkAs is the case for switched connections, a PC on the LAN sending data to a resourcereachable through a VPN connection profile will cause a tunnel to be set up to theremote site. Once this is done, the VPN user session will commence, beginning with aPPP authentication exchange.VPN Tunnelover ISDN700 #1700 #2Secure Data ISPISPInternet |
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