Innovative Systems of Communication (ISC, Inc.), a Russian-based company, launched Flashphone.ru, a proof-of-concept Flash-based phone app which I discovered & reviewed back in November. More recently ...

I’m trying to get info from a supplier and they are insistent that a trunk is a 1 to 1 with a call. Now I am 99.999% sure he's wrong, but before I tell him so I wanted to make sure someone who knows ...

Discover the differences between SIP vs VoIP and why those differences don’t really matter that much during the buying process. SIP vs VoIP is a common question, but it’s not going to help you during ...

Ok, so Skype, Inc. won't let you dial into your Skype username using a SIP URI. Yeah, Skype claims their proprietary protocol is better than SIP. I've written about one SIP-to-Skype workaround, but ...

SIP carriers that want to differentiate themselves can't just do so on cost--considering that all I really have are two cheap trunks that give me unlimited local calls and 100 minutes of long distance ...

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 ...

Session initiation protocol (SIP) is a standard protocol used to initiate an interactive user session. SIP determines the end system to be used for the session, the communication media and media ...

The Session Initiation Protocol and voice over IP are two complementary, yet distinctive, technologies that have helped underpin internet communications. Both SIP and VoIP are core components in ...

Emmanuel Proulx is a SIP (Session Initiation Protocol) developer who has written an excellent tutorial on the signaling protocol that is widely used in VoIP to initiate communications sessions between ...

GAITHERSBURG, Md., July 31, 2025 (GLOBE NEWSWIRE) -- GL Communications Inc., a global leader in telecom testing solutions, addressed the press regarding their SIP protocol emulation and testing ...