SIP Trunking is the process used to connect IP phones to traditional phones on the PSTN or Public Switched Telephone Network through a PBX or Private Branch Exchange Network. PSTN is the traditional network which is being used for decades to help people talk to each other from a distance. PBX exchanges were used by business houses to allow people in various departments of the business communicate with each other. The two exchanges were connected by PRIs or Primary Rate Interfaces so that a person from a particular business department could connect to an independent person connected to the traditional network.
Advantages of SIP
The VoIP feature of an SIP Trunk has completely changed the world of modern communication. The existing broadband network has taken over traditional telephone cable installations and physical exchanges. An SIP Trunk Provider is essential if you want to use your broadband to communicate with regular phones. When you use the SIP Trunk, you can avoid the cost of communication by more than fifty percent.
You can talk with people anywhere in the world at local rates. The number of outgoing or incoming calls is no longer dependent on the number of trunk lines as SIP allows a vast number of concurrent calls at any moment. It saves a considerable amount of time while you can relocate quickly and call others on the move.
Choosing the provider
When you want to change from a traditional telephony system to a broadband network and the internet you need a specific SIP Trunk Provider to set up your communication system. Some of the things that you need to consider while selecting the provider are the maximum number of concurrent calls allowed, monthly usage rates in minutes, number of Direct Inward Dial calls, breakdown of the types of calls, connection modes, availability of business requirements like internal toll free numbers, 911, the maximum uptime, redundancy and availability provided.
Security and support
There are a few more points that are important when selecting the SIP trunk provider. The quality of security is the primary concern for business houses. The type of encryption methods and DOS or Denial-of-Service to unauthorized persons is also critical.
Support is another factor which plays a significant role in the selection process as business houses need to recover as fast as possible from system outages. Support for scalability is also a prime factor as business houses may want to increase the number of lines at any instant or remove some lines if they have no use.
Pricing and audio
Pricing is one of the primary considerations when selecting an SIP Trunk Provider. As the calls get charged at the time of use and not at a flat rate every month, most of the business houses can save a lot of money on the communication systems. They pay for only what they use and nothing more.
Audio quality has also been a primary requirement for the business house which operates in a multinational environment and has branches in different countries all over the world. They want that voices should be crisp and clear irrespective of the distance between the two communication points.
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