A SIP trunk is the digital version of an analog phone line. Learn how you can upgrade to a unified digital phone system for ...

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 ...

Most people communicating on the internet are using SIP calling. Here’s how to make free SIP calls — and when you shouldn’t. Session Initiation Protocol (SIP) allows one device to find another and ...

I have a question for all you No Jitter readers: What is SIP used for? If you are like most people in the communications industry, you will tell me that SIP is used to make telephone calls. Some of ...

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