SIP Trunking FAQ: What You Need to Know

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SIP trunking is a phrase that is becoming more commonplace in the virtual communications world. If you hear it, and are not familiar with it, then it portably sounds like a foreign language. However, once you break it down, SIP trunking isn’t nearly as complicated as it seems.

What Is SIP?

Before you can understand SIP trunking, you need to understand SIP. SIP stands for Session Initiation Protocol, which is basically the name of the technology that is used to establish communication over a specific data network—most commonly the Internet. Your VoIP system uses several different protocols to portray various communication methods, and SIP is just one of the protocols used. SIP is able to carry several types of data, including voices, emails, videos, and more, and it can also initiate multi-party communication, such as conference calls or group video discussions.

What Is SIP Trunking?

SIP trunking is essentially the term used to define the actual data connection provided by SIP. Unlike traditional phone lines, an SIP trunk does not require any physical wire connections. Instead, your SIP trunk provider relies on your data circuit (ex: cable modem, Ethernet over copper, DSL, T1) to relay information between your phone system and their network. SIP trunking is the protocol that is most commonly used in VoIP systems.

Why Switch to SIP Trunking?

Many companies choose to switch to SIP trunking because it eliminates the need for physical phone lines. Not only is this more convenient, since it runs through your VOIP system, it is substantially less expensive to set up and maintain than a traditional phone line. SIP trunking can also provide you with caller ID and the ability to accept local calls.

How Many SIP Trunks Should I Install?

There are two main factors that determine how many SIP trunks your company will need to integrate into their VoIP system:

  • How many phone calls are usually being made at the same time? You will need one SIP trunk for every 2-3 users that require concurrent use of the system.
  • How much bandwidth does your company have available? Each SIP trunk uses bandwidth, so you will not want to install more SIP trunks than your system can handle. Either that, or you will want to expand your bandwidth capabilities.

SIP trunking is an excellent way for your company to cut costs while improving their communication abilities. To learn more about SIP trunking and to discover how it can be integrated into your VoIP system, contact Top Line Communications now.