Got a Cisco ATA 196 VoIP adapter. However it does not have the SIP protocol installed. Need advice on how to get the firmware needed to upgrade to SIP and how to do it. I'm aware that TFTP is involved ...

For those who don't need videoconferencing and just want to use their broadband connections for voice communications, Vonage offers a compelling alternative. Vonage is a combination of a service and ...

While setting up a VoIP service in their home, security researchers at Tenable Research discovered a total of 19 vulnerabilities in VoIP adapters from Cisco's SPA100 Series. If exploited, these ...