To know how SIP trunking works, an overview of SIP must first be provided. SIP stands for Simple Internet Protocol and is basically the standard format used for VoIP phone calls. This is a very sophisticated protocol which establishes a virtual VoIP call on the internet through a web server or a service provider.
In case of business VoIP, the VoIP protocol supports both conventional PSTN and IP networks. The primary difference lies in the fact that a SIP trunk call is made over a conventional PSTN network, while IP phones are restricted to using an IP network only. SIP also has a higher level of security that is not present in IP networks.
SIP is also more flexible than conventional IP networks since it can accommodate large-scale calls. A call is then routed to a number of destinations depending on its originating IP address. As the SIP call is routed through the IP network, it will use the IP header of the call instead of routing it through the traditional PSTN system.
As far as the features and functionality of an IP phone are concerned, SIP is no exception. The main differences lie in the features that are supported by SIP rather than the features of the traditional IP networks. The most prominent features of SIP include the following:
An IP call can support multiple participants and multiple users simultaneously. This feature is known as the Multi-Stream facility. Through this facility, users can have different calls going to different participants in the same call. The process is usually done without affecting the original call. This feature ensures that the call can go through uninterrupted by any kind of interference from the other participants in the call.
SIP also allows the user to get hold of call waiting services. These allow the users to be able to set up long-distance call waiting to wait for the incoming call and then to be able to make a response. This option is commonly used when a large number of people want to connect to a call waiting service.
Another feature of SIP, which is very important for companies and institutions who conduct business is the SIP trunking service. This service is used in a variety of ways such as connecting two networks using the same IP networks or connecting two users in two different networks at one place. In addition to this, it is also used to link a hosted SIP phone system. with a local SIP phone service.
In summary, SIP has a very unique way of addressing calls. SIP allows for both the call’s originating IP address to be visible to the user’s IP address, which allows them to see the source of the call. It also provides users with a number of features that enable them to get hold of multiple users at a single time, with the ability to place calls from a single computer.
The benefits of using SIP trunking are many. For companies and institutions who need to have more than one IP address or for those who need to connect two users with the same IP address, the features of SIP are perfect. SIP makes it possible for both users to speak at the same time as well as to listen simultaneously.
For businesses, SIP trunking allows them to use the same IP network and voice network for their calls, while still keeping track of all the call details so they can provide call forwarding or management services for their customers. The benefits of SIP are particularly useful for businesses that have various employees working remotely or for various departments.
For the users, the benefits of SIP include being able to make long distance calls with ease at a much lower cost. since the calls are not directly billed to a number, nor are the costs incurred by using SIP charged to the users’ credit cards.
In a nutshell, SIP makes it possible for users to make calls from a single location and at a much lower cost than traditional PSTN systems. SIP offers a great convenience and flexibility to both the end users and the organizations that use the technology.