主页（http://www.pttcn.net）：SIP 相关技术系列讲座开讲(7) Disaster Recovery ‘Expanded detail’ Disaster Recovery – Last resort? Number Consolidation Virtual Presences Trunking Variations Single Site, No ‘Forklift’ Single Site, TDM PBX Single Site, Converged Converged – SIP/IP PBX Multiple Site, ‘Converged’ Multiple Site, ‘Converged’ + central SBC Multiple Site, ‘Converged’ + Multiple SBCs Media Gateways SIP PBX to Non-SIP PBX SIP PBX to Non-SIP PBX, Call Flow SIP Trunk Performance Connection types The ADSL issue Codecs, Voice and Data Symmetric DSL (SDSL) Bandwidth Calculator Testing your link ADSL Developments Fibre Options SIP Trunking, MPLS and SD-WAN MPLS, basic explanation MPLS Label format MPLS in a MAC frame MPLS example network MPLS benefits Your own private WAN but ‘Not the only client’ Separate MPLS networks VPLS explained WAN Optimization, Hybrids and SD-WAN Software Defined WANs explained Security and SIP Trunking SIP Trunk Security - Overview Session Border Controllers More on SBCs The ‘corporate’ SBC SIP REFER issues Setting up a SIP Trunk Add a VoIP Provider Provider SIP Servers Authentication Add a Dialling Rule Trunk setup complete Call out Trace Comparing SIP packets from two ITSP providers Skype for Business and SIP trunks ‘Optional’ Lab exercises Skype for Business ‘Network Environment’ Topology Builder Control Panel Management Shell and basic commands Installing Skype for Business Client Making Calls Using Wireshark to monitor calls from a Skype network environment to the PSTN across a SIP trunk Some PBX Requirements Enterprise PSTN Identities P-Preferred and P-Asserted Call Progress Tones Troubleshooting and Interops SIP Trunks and Common Problems Choosing an ITSP Understanding ITSP Offerings 'Sticking points’? What you may need in the future SIP trunk ‘connectivity’ Things to watch out for when connecting to your ITSP ‘Finding’ an ITSP SIP trunking Checklist for ITSP evaluation Working together
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