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30.5 Billing Attacks > 30.5.4 Bye Delay Billing Attack - Pg. 777

CHAPTER 30 Security Issues in VoIP Telecommunication Networks 777 Vonage phone MITM INVITE Vonage server(s) ATT proxy servers MITM2 ATT phone 407 proxy-authentication required ACK INVITE (credentials) 100 TRYING Busy 180 RINGING 200 OK ACK RTP stream BYE ACK RTP stream BYE INVITE 100 TRYING 180 RINGING 200 OK