Enterprise Voice over IP Management. Alan Clark Telchemy. Telchemy. Actively Managing Multimedia. Actively Managing Multimedia

Transcription

1 Enterprise Voice over IP Management Alan Clark

2 The problem space Transient problems Network changes LAN congestion Route changes Link failures DSL/Cable link congestion Access link congestion Finger Pointing Between Network And Telecom Manager Finger Pointing Between Enterprise And Service Provider

3 and in the future.. Enterprise A domain IP Phone to IP Phone connection Enterprise B domain IP Service Provider 1 IP Service Provider 2 Multi-vendor environment management firewalls No end-to-end problem resolution tools

4 The problem space How to: manage a Voice over IP service or network and ensure consistent quality? locate, diagnose, resolve transient problems? provide network-wide performance monitoring at minimum cost? How to do all the above in a multi-vendor network? How to do all the above across multiple independent IP networks?

5 Solution consistent methodology Embedded software Probe IP Phones & Gateways Stream based monitor/ probe /analyzer Common VoIP QoS monitoring algorithm

6 and real time information flow IP Phones & Gateways Easier Fault Diagnosis and Localization Helps solve problems that span management domains Test and monitoring equipment understands metrics Generated by endpoints

7 Detect transient network problems Discarded Arriving packets Loss events 4-state Markov Model Gather detailed packet loss info in real time Jitter buffer CODEC Discard events VQmon metrics calculation MOS-LQ MOS-CQ MOS-PQ Network R User R Burst statistics Diagnostic data

8 Create a real time information flow VQmon/EP Enabled IP Phones Collection/ Mediation device SNMP RTCP-XR VQmon software RTCP-XR gets data from endpoints through the voicepath - Solves inter-network problems - Exchanges information between endpoints - Same metrics payload -> SIP and H.323

9 How does this help solve the problem? Use the same algorithm in SLA Monitors, Analyzers, IP Gateways, IP Phones. Use tools that detect and incorporate the effects of transient network impairments Use tools that generate detailed diagnostics to help resolve the problem quickly Embedded software probe approach is inexpensive to deploy

10 Enterprise Example VQmon enabled IP Phone VQmon enabled Analyzer Provides consistent real time information from end-systems, key paths and streams, and Service Providers,VPN VQmon enabled end systems Management System VQmon based Probe and Collection point VQmon measured Service Level Agreements VoIP service

11 About Provides software technology for non-intrusive and active Voice over IP service quality monitoring and problem diagnosis. Pioneered an embedded software approach - provides a lowest cost - network wide real-time monitoring VQmon technology licensed by Artiza, Brix Networks, Brooktrout, Finisar, Nortel Networks, Visual Networks Key partnerships with leading DSP software vendors to incorporate key software components directly into Vocoder - makes integration easy VQmon has been deployed in the field for over 12 months and is used by many service providers and key Enterprise networks