Voice over IP (VoIP) is the descriptor for the technology used to carry digitised voice over an IP data network. VoIP requires two classes of protocols: a signaling protocol such as SIP, H.323 or MGCP ...

A straightforward approach to troubleshooting VoIP that can be applied to video as well. VoIP is particularly sensitive to packet loss, and determining the cause of the packet loss can be difficult.

Following up on the VoIP quality issues that we discussed in last week’s newsletter, this week we’d like to take a deeper dive into some of the possible problems that can make VoIP call quality ...

Security is emerging as a major concern in the deployment of VoIP in the enterprise. Traditional firewalls, which were never engineered for real-time media, can seriously impair VoIP performance.