SIP Softswitch 101

Among everyone who probably read about SIP (Session Initiation Protocol) services and definitions, many are not fully knowledgeable about the so-called SIP softswitch. So I would like to take this opportunity to discuss a little about what exactly this SIP network system member is. For  quick background information, SIP is the technology that allows  telephone systems to be able to function over the internet.  Meaning, instead of traveling through the traditional phone  lines that we know, SIP systems sends off their call signals  through the World Wide Web. You may ask, where in this kind of process does the SIP softswitch lie?

First of all, in order for a telephone system to be connected to  the internet and vice versa, they are interconnect through a  softswitch. The softswitch serves as the bridge that connects the two networking systems, and so it is also where all signals for outgoing and incoming calls are passing through to be controlled. Signals that go through the softswitch are analyzed as to where they come from and where exactly they are going, and then the device will send them to their proper route. But not only that, as it also adjusts the properties of  these signals.

Let us take a Public Switched Telephone Network (PSTN) number calling a SIP-enabled system for an example. For this, the softswitch will filter the PSTN call signals and turn them into IP forms so that they will be able to connect to the SIP system. And this is also what  happens if the SIP system calls a normal PSTN number.

This specific function of the SIP softswitch is the reason why more and more businesses and individuals alike are availing SIP services for themselves. Because the softswitch can alter signal properties, it can remove all possible long distance charges from phone calls being made even for thousands of miles away. So now, do you understand  exactly what a SIP softswitch is and how it functions?

Article created by Mike, also worth checking out ds3 internet.