VoIP Call Recording using Port Mirroring

November 13, 2006
VonalinkRemember my VoIP call recording round-up of various VoIP call recording solutions? Well, it's time to update that post with a new solution I found from Arcosoft Inc. Arcosoft today announced the release of VONaLink TeamRecord, which works with any VoIP phone system based on the open SIP standard, such as Asterisk or Vonage, to centrally record all phone calls. What is interesting about this solution is that it unobtrusively "sniffs" for voice packets on your data network by leveraging the port mirroring capability of a network switch. By implementing port mirroring, TeamRecord can see all of your network traffic, and then using intelligence packet capturing technology it can find the RTP (audio) stream without the need for any recording software at each workstation. Sure, you could do port mirroring even without Acrosoft and then use Ethereal or some other packet sniffer to decode the RTP streams, but it's more of a kludge. Besides, most network packet sniffers weren't designed with VoIP in mind, so their features are limited.

VONaLink has some interesting features. For instance, in addition to recording the RTP audio streams as a stereo WAV or MP3, you can add an inaudible watermark for later verification that the file has not been changed. In addition, users can listen to recordings of their own calls from any web browser.

VONaLink TeamRecord runs on Windows XP Pro, 2003, and 2000. Price starts at $500 USD for 5 phone licenses. Each additional phone license is $100 USD. You can download an evaluation copy from www.vonalink.com

Post a comment

See this page in TechnoratiTechnoratibook mark in del.icio.usDel.icio.usSlashdot.comSlashdotSubmit to Digg.comDigg

Tags: , , , , , ,

Search Technorati: , , , , , ,
Related Tags: , , , , ,

Listed below are links to sites that reference VoIP Call Recording using Port Mirroring:

Trackback Pings

TrackBack URL:
http://blog.tmcnet.com/mt3/t.fcgi/30422

Comments to VoIP Call Recording using Port Mirroring


  1. Vonalink :
    February 23, 2007 7:41 AM

    TeamRecord is now also available for Linux.

    http://www.vonalink.com/TeamRecordLinux.htm


  1. pradeep :
    April 4, 2008 4:05 AM

    i need voip call recording software for 110 users


  1. Kim :
    April 13, 2008 12:13 AM

    Hi - this sounds perfect! We would like to centrally record all incoming and outgoing calls for training and QA purposes. And I've been looking for the solution. But I thought that Asterisk has call recording built in (at the server). I think I must be missing something. Why would I need TeamRecord also? How does it compare to the built-in call recording that Asterisk provides?

    Thanks! -Kim


  1. Vonalink :
    April 15, 2008 5:08 PM

    One of our TeamRecord customers who has tried Asterisk built-in recording had this to say:

    "Asterisk's built-in recording is CPU intensive and degrades call quality under load. It also has a hard time remixing the streams, so we used to get calls that were out of sync, or just plain did not remix.

    A passive packet monitoring solution, such as TeamRecord, relieves the phone system of that overhead."


(If you haven't left a comment here before, you may need to be approved by the site owner before your comment will appear. Until then, it won't appear on the entry. Thanks for waiting.)