SIP trunking is a communications service provision that uses an application layer protocol to steer voice over IP connectivity between on-premises phone systems and the public switched telephone ...

SIP may be the most popular protocol for operating a VoIP phone system, but it’s not your only option. H.323 is another common protocol found in VoIP systems.

IMS uses Session Initiation Protocol (SIP) to create, modify and terminate IP sessions. Our longtime readers will recall that SIP is the service providers’ planned protocol of choice for VoIP ...

Session Initiation Protocol (SIP) is a must for voice over IP (VoIP) communication. But by itself, SIP is insecure and easily hacked. Here's what you need to know to protect your calls and your ...