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  1. Technical Analysis of Hosted Voice over IP Solutions for Small and medium Enterprises George Njoroge CSCIE 139 gnjoroge02@gmail.com

  2. Hosted vs. Managed VoIP • Hosted VOIP is utilizing a company for phone connectivity (soft and hard), extensions, voicemail, using the hosted company’s equipment. • Managed VoIP is your equipment often hosted at some datacenter and utilizing a consultant to manage it.

  3. Reasons to Use a hosted Provider • Lower Capital Expense • More than one office • No in-house VOIP Expert • Call Center • New Features • Executive Home Users

  4. Options for Hosted VoIP • Utilize the same ISP as the local LAN for VoIP traffic • Utilize a Managed Line and Managed VoIP Gateway

  5. Option 1 • Utilizing the same ISP as the LAN for VoIP traffic has the following possible issues • Jitter • Any jitter on the phones will create popping and clicking even if the packets arrive within the time frame of 300-400 milliseconds. • Latency • Poor call quality due IP packets arriving at different intervals • Possible Call drop • Could be great 90% of the time and 10% poor quality • No QOS

  6. Option 1 configuration

  7. Option 2 • Managed Line • MPLS • MPLS labels are encapsulated in the VoIP packet • voice/RTP/UDP/IP/MPLS-labels • VoIP Gateway Device • Traffic shaping in the system is designed to ensure that high priority real-time data is processed before lower priority non-real-time data. • Guaranteed QoS

  8. Option 2 configuration

  9. Executive Home User

  10. Mobile Client Access • Call Forking “find me follow me” • The hosted PBX can be activated to use the find me follow me feature. This means when enabled, the phone will ring at the predefined mobile number on the pbx. This will be a 3G/4G call and will not utilize data. • Mobile Client App • The Mobile client app will act as a soft phone. The client will work over the data plan on a wi-fi connection. If none exists, it will utilize the data plan

  11. Issues with Mobile Client • No Quality of Service • Cell Coverage • Unreliable Wi-Fi

  12. Troubleshooting • ISP based option • Run trace route command to check for any packet drops • Run a Ping to the hosted ISP to see if there is any packet loss • Check network latency using tools internally and externally. (www.speedtest.net) • If Phones have no connectivity, check wiring, and port connection.

  13. Troubleshooting • Managed Line connection • If call quality is low, we can contact our provider as they provide the line • Check logs in the VoIP Gateway • No phone connectivity, check the wiring and data ports

  14. Troubleshooting • Soft phones • Check headset connection into the PC and microphone configuration • Check for high CPU usage on the PC • Network connectivity. Soft phones do not work in an ISP based configuration. They require a VPN to the hosted VoIP server. • Check Workstation Firewall

  15. Troubleshooting Executives Home Phone • Check the VoIP gateway for any issues • Verify valid internet connection • Check for connection speeds • Check wiring • Check Switch • Check connectivity • Contact VoIP provider

  16. Questions?