1. Call Detail and Call Maintenance Records for Performance Measurement

2. Call Detail Records - CDR: info about the endpoints and control/routing of a call Used for billing Call Management Record - CMR: info about the quality of the streamed audio of a call May have more than one CMR per CDR Both CDR and CMR are needed Documented by Cisco

3. Background and Motivation 1998 Voice over IP with Selsius now > 12,000 ethernet VoIP instruments Integrated Backbone Architecture ATM moving to routed ethernet Star of routers - 2 levels 8 routers at UP

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6. Service Level for Voice Performance SL developed to support voice One way latency < 25ms Loss < 0.001% packets Jitter < 5ms

7. SL continued Model voice traffic and measure it Modeled by UDP streams at 85 kbps Measured loss, latency and jitter Van Jacobson talk/paper about pathchar - MSRI using iperf 1.7

10. QoS for Voice Implemented Expedited Forwarding To protect the voice traffic in 6500/7600 Cisco router Compared with best effort vs EF for voice

12. While at a meeting While at a meeting with Cisco about a separate problem, I stumbled upon the fact that the Cisco IP Phones track network statistics

15. The phones report loss, latency, jitter, packets and octets sent and received. which can be recorded in CDR/CMR CMR

16. So, the next step Establish thresholds intra system phone-to-phone Inter-system phone-to-someone-else’s-stuff

17. This is still a work in progress Questions Thank you