VoIP phones offer the familiar look of a conventional desk phone with similar functionality, but aren’t as plug-and-go. Like so much networking kit, setting up a VoIP phone can be a very frustrating ...

Update: We're in the last throes of winter break 2019, which means most Ars' home office phones can stay dormant for a few more days. As such, we've been resurfacing a few classics from the ...

Cyber-attacks using the VoIP protocol Session Initiation Protocol (SIP) have been growing this year accounting for over 51% of the security event activity analyzed in the last 12 months, according to ...

In Part 1 of our SIP primer, I covered the SIP foundation layers starting from the message structure and ending with the SIP transactions. We saw how phone registrations and proxies could work using ...

One reason analog telephones are still around is that you can buy an inexpensive model, plug it in and begin making calls right away. When was the last time you were able to do that with a new IP ...

Spirent Communications' platform for testing core network functions can test and emulate virtually any VoIP and IMS network element, function or service. The Spirent Protocol Tester provides ...

Testing your VoIP security system against all the threats that exist on the network can be a full time job. This guide documents how a VoIP system can be tested and suggest some of the available tools ...

Voice over Internet Protocol (VoIP) is a type of technology that allows its users to make calls using the broadband Internet rather than the conventional or analog phone system. VoIP works by ...

Several critical vulnerabilities have been discovered in voice over Internet Protocol (VoIP) and videoconferencing products based on the H.323 protocol that’s used in IP telephony applications to ...