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As wireless LANs as well as the high-speed broadband Internet service are widely deployed, the VoIP service has become popular. Generally, a lot of commercial VoIP services use SIP and RTP for signaling and voice transport protocols. Most commercial VoIP service providers employ only simple security functions such as basic authentication without packet encryption because of fast implementation and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.