SIP-Trunk: what this technology is and how it can be useful

SIP-Trunk: what is it, who needs it and why?

SIP-Trunk (Session Initiation Protocol Trunk) is a technology that allows you to transmit voice and other multimedia traffic over the Internet using the SIP protocol. Thanks to this technology, it is possible to combine several PBXs into a single communication channel for employees who can communicate with each other for free.

SIP-Trunk is suitable for businesses that need a lot of phone lines: from individual entrepreneurs and small businesses to international companies with offices all over the world. It is enough to create a SIP-Trunk once and connect a new pool of numbers, after which you get the opportunity to use them as CallerIDs without additional settings in your personal cabinet.

How SIP-Trunk works

Unlike ISDN networks, which use analogue phone lines to route calls, SIP-Trunk works with digital phone lines. Using this technology, an IP connection is established between the customer's telephony or unified communications system and the SIP telephony provider.

The principle of SIP Trunking is that calls are split into ‘digital packets’ and sent by the data network. All you need to connect the service is access to the Internet.

Here are the basic processes that take place when SIP-Trunk is in operation:

1. Session initiation. When a subscriber wants to make a voice call or other multimedia session, their SIP client initiates the session by sending a SIP request to SIP-Trunk.
2. Routing. SIP-Trunk processes the received request and determines which network resources should be used to deliver signalling messages and media data.
3. Session establishment. After routing, the SIP Trunk establishes a session with the target subscriber by exchanging signalling messages.
4. Media transfer. Once a session is established, SIP-Trunk transmits media data (voice, video or other) using RTP (Real-time Transport Protocol) over the connected IP network.
5. Session management. During the session, SIP-Trunk is responsible for managing the session, including changing its parameters, which may change in the process (for example, adding new participants to a video conference).
6. Session termination. When the session ends, SIP-Trunk performs a termination process using a SIP message to close the session and release the resources used.

What opportunities SIP-Trunk offers

Thanks to the fact that SIP-Trunk is powered by cloud telephony, you get the opportunity to:

• exchange voice messages and video;
• record conversations;
• add new additional channels;
• use various messengers;
• retain your company's phone number when you change offices;
• access real-time statistics and data analytics;
• transfer data to machine learning services to take advantage of business intelligence capabilities.

By the way, statistics can be traced to the level of individual indicators, so you can get a snapshot of the state with information about the interaction of each employee with current or prospective customers. This real-time access to information helps your business improve employee performance and enhance marketing, customer service and sales.

Advantages of SIP-Trunk connection for business

If your company currently makes a lot of calls or is projected to make more calls in the future, a SIP-Trunk service is an attractive choice. And here's why:

• Cost savings. SIP telephony uses the Internet for voice and data (i.e. there's no need to invest in new equipment), and SIP-Trunk is charged on a per-channel basis. This significantly reduces communication costs, especially for international calls, compared to using traditional phone lines.
• High call quality. The wide bandwidth of the Trunk network guarantees high call quality even during the busiest periods. In addition, the technology automatically corrects errors such as echo and static.
• Mobility and availability. SIP-Trunking can be easily configured to work anywhere with Internet access. This is especially important for companies with remote or distributed teams, as employees can use one phone system anywhere there is an internet connection.
• Increased productivity. SIP-Trunk supports advanced features such as group calls, video conferencing, call forwarding, integration with CRM systems, etc. This allows you to increase productivity and convenience for your employees.
• Flexibility and scalability. SIP-Trunk is not tied to a local PBX and allows you to have local numbers in any region, regardless of the physical location of you or your office. Also SIP-Trunk allows you to connect different types of telephone devices (IP-phones, softphones) in accordance with the required maximum number of calls.
• Easy management. Users of the SIP-Trunk service have the ability to centrally manage all aspects of the telephone service via a web interface or specialised software. This simplifies system management, including adding new lines, setting up access rights and monitoring usage.
• Reliability. SIP-Trunk technology provides number resilience and does not use a fixed end-to-end route like traditional phone lines, avoiding network problems or failures.
• Security. Unlike earlier phone systems, SIP-Trunks are dedicated connections for your calls, providing protection against unauthorised access to the network.
• Integration with other systems. SIP-Trunk can be easily integrated with other enterprise systems such as CRM, ERP and call accounting systems. This allows businesses to create fully integrated solutions to effectively manage customer service and business processes.

With the help of Maxnet, you can join the ranks of other companies that are already enjoying the benefits of trunking for business. To find out more details and sign up for SIP-Trunk service, leave an application on our website.