Here is a link to the webinar I did this week, along with Cisco, on Telephony Denial of Service. You do have to register, but that is a small price to pay :)
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Thank you for sharing your valuable information.this information very useful for online learners
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Posted by: rentaphonesystem | November 04, 2014 at 10:13 PM
Great webinar i must say. Thanks for sharing great information with us. God bless you.
Posted by: Voipinvite | January 19, 2015 at 11:48 PM