What is SIP Trunking and How Does it Work?

As a business owner, you are constantly looking for ways to reduce costs and reprioritize your expenses. With all the services that are in charge of the administration (commercial services, shipping services, payroll services, etc.) it is understandable that you have not mastered the knowledge of each industry. You may have heard about the SIP trunk and perhaps a friend of yours save money by using it in your business but would like to know more about how it works before communicating with providers. Understandable.

Below is a high-level overview of the SIP trunk and how it works:

What Is SIP Trunking?

The Session Initiation Protocol, or SIP, is the way you achieve a voice over IP (VoIP) call. It is an application layer protocol for configuring audio and/or video sessions in real time between two endpoints (telephones). In short, SIP is the technology that creates, modifies and ends sessions with one or more parties in an IP network, be it a two-way call or a multiparty conference call.

A SIP trunk is the virtual version of an analog telephone line. Through the use of SIP trunks, a SIP provider can connect one, two or twenty channels to your PBX, allowing you to make local, long distance and international calls over the Internet. If you have a local PBX in your office, a SIP trunk provider can connect with you and allow you to make outgoing calls on your existing system, without

How Much Does SIP Trunking Cost?

The cost of the SIP trunk can vary depending on the needs of your company, but generally, companies can pay an installation fee of $ 0 to $ 150 and monthly costs of $ 25 to $ 50 per trunk.

Many SIP trunk providers, such as Digium, offer plans that provide unlimited calls from inbound and outbound, local and long distance calls, channel by a call. Each channel offers the possibility of making or receiving a single call. Once you have filled all your channels, you can not make or receive additional calls. You can always add additional channels to get more capacity by contacting your provider. This type of SIP trunk service allows companies an easy way to budget their telecommunications expenses.

How Many Concurrent Calls Can Be On A Metered SIP Trunk? What About Bandwidth?

The limitation is based on the bandwidth capacity of the Internet. Each uncompressed call uses approximately 85kbps of bandwidth. In most Internet connections, your upload speed is usually your slowest speed, so when determining the number of calls your connection will support, you should use your upload speed.