1 / 17

Call Detail and Call Maintenance Records for Performance Measurement

Call Detail and Call Maintenance Records for Performance Measurement. 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

larissa-reid
Download Presentation

Call Detail and Call Maintenance Records for Performance Measurement

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

  4. Text

  5. Text Text

  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

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

  9. 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

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

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

  12. This is still a work in progress • Questions • Thank you

More Related