Hi! > 1 PRI to Telco > 1 PRI to old PBX > Several SIP phones with the intention of having approx. 200.
> Currently the traveling users have to VPN in first which I am sure is adding > extra overhead to the calls. > I have yet to open my server to the Internet to be accessible to travelers > without VPN first. > I have done some testing with VOIP provider though my firewall to FWD and > VOIPSTUNT. > > Where might SER help? Let's see what I can come up with: * Advantages: - SER supposedly has SRTP encryption support today through an add-on; Asterisk isn't there yet (TLS is missing); with SRTP you can get rid of the VPN tunnel. See: http://www.voip-info.org/tiki-index.php?page=Asterisk+encryption - with SER multiple registrations with the same (!) user credentials become possible - You get the full power of a true SIP proxy permitting you to freely modify SIP messages as you see fit * Disadvantages: - SER documentation isn't ideal especially when it comes to Asterisk integration, and you'll need to dive more closely into the SIP protocol details - SER encryption is not that easy to set up; naturally you'll also need SIP phones that can do SRTP (at this moment the SNOM 360 softphone is probably the only softphone that supports SRTP, however this is rather a test and promotion software for the real hardware phone than a permanent solution for your users) - you'll probably need the VPN anyway for web, email, database connectivity - only if you decide to go for hardware phones instead you might gain by not requiring the VPN - You'll need to get used to and manage two instead of one VoIP system, and that for a case where Asterisk alone would be totally sufficient by itself - You'll need to find a way to handle the MWI issue, see: http://www.voip-info.org/tiki-index.php?page=Asterisk+at+large Cheers, Philipp _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
