Let’s Review the Basics of IP Telephony

IP Telephony has been around since 1973 and began to be available for consumers in the mid-1990s. According to Pew Research, seventeen percent of Americans know what VOIP is, which is roughly 34 million people. 

IP Telephony lays the foundation of SIP and VOIP technology, and we’re here to share what that’s all about. 

What is IP Telephony?

Generally speaking, two-way voice transmission over an IP network is IP Telephony. You often hear IP Telephony and VoIP used interchangeably; still, the terms VoIP and SIP are more widely known for the services offered, and IP Telephony is the technology behind them. 

The internet and it’s TCP/IP protocol suite started to turn data communications and the telephone industry on its head in the 1990s. It wasn’t long before IP became the universal transport method for data and video communications, and now it has mostly become the basis for voice communication. 

When Voice Over Data Arrived

You may know that in the 1960s, data was sent over analog telephone networks. What’s more, is that by the late 1980s, it was commonplace that data was sent over digital voice circuits. Did you know that by the 1990s, most global communications traffic had moved from voice to data? 

Things like IP networks had begun to take off, making the economics of using them for voice communications more visible. 

Quality Issues

Although PC to PC and phone to PC became popular in the mid-1990s, especially for international calls, call quality was erratic. The public internet gives no guarantees for the quality of service (QoS). 

For private companies where they have more control over their network, the quality was much better. This revelation led many companies to develop IP networks along with many others. 

Signaling and Transport in IP Telephony

There are two protocols used in IP telephony, one is for signaling, and another is for transport. UDP over IP for voice packets manages transport, and either TCP or UDP handles signaling. 

There are specific signaling commands to establish and terminate the call; besides, they deliver other features like call forwarding, call waiting, and conference calling. These are defined in a signaling protocol like SIP, MGCP, H.323, or MEGACO, as examples. 

What is SIP?

SIP or session initiation protocol is an extremely flexible protocol that has many usage scenarios. It is used in VoIP communications to allow users to make voice and video calls over the internet. 

When we look at a traditional business phone system, it usually consists of two parts. The first is a private branch exchange (PBX) that controls call management features, like call routing and voicemail. The second is the PRI lines, and these connect to a PSTN (public switched telephone network). 

New technology has made remarkable advances to this system using something called SIP trunks. SIP trunks allow businesses to use the internet to connect to an integrated PBX system. The PBX still does the mostly the same work, but Least Cost Routing (LCR) has new routes over the internet, that help to save businesses up to sixty-three percent on their phone bill. 

Choosing Between SIP and UCaaS 

With many companies moving communications to the cloud, what does it mean for SIP trunking? For the most part, the move to UCaas hasn’t had a significant impact on SIP business. Nemertes Research conducted a recent study where eighty-nine percent of the 645 firms surveyed continued using SIP when moving to a UCaas solution. It’s one of the many reasons why SIP continues to thrive despite the trend to transition to the cloud. 

Selecting a SIP Trunk Service Provider

Now, many businesses are turning to IP telephony and SIP because it’s a technology that offers many advantages over conventional telephone systems. 

When you are looking for a SIP provider, you may wonder where to begin. There are a lot of contenders in the market, but which is the right one for you. Here is a short checklist of essential qualities to look for when you’re ready to implement SIP Trunking:

  • Excellent Tech Support
  • Network Redundancy and Reliability
  • Guaranteed Security Against Threats
  • Great Coverage Area
  • Flexibility in SIP Plans
  • Excellent Pricing Models
  • Easy Scalability
  • Knowledgeable Representatives
  • No Tech Jargon, Uses Plain Language
  • Good Voice Quality

What Does a Good SIP Provider Do?

We know that SIP Providers provide voice communications. Besides deciding that SIP trunking is right for your business, you need to pick a SIP provider, so it is an excellent idea to learn a bit more about them. 

In general, a SIP provider connects your PBX to the Public Switch Telephone Network (PSTN). It will allow you to make calls to anyone around the world and for a lot less than your previous system. 

When you are looking for a SIP trunking provider, seek out a company that will give you the features you want, but also fits your budget and has reliable client support.

Why Choose SIP Trunking?

The leading reason companies are choosing SIP trunking is its cost-effectiveness. Businesses have always relied on the Least Cost Routing of their phone systems, but SIP trunking takes LCR to a new level. SIP trunking nearly eliminates the need for long-distance calling by routing international and inter-state calls over the internet. 

SIP is more likely the right choice for you if you have a business that relies on many inter-state and transcontinental calls. 

There are indeed many reasons to choose SIP trunking; more often, it’s related to reducing costs, increasing revenue, and enhancing customer satisfaction. 

Ready for SIP Trunking?

IP telephony has brought us a long way over the last 20 years. What’s more, is there is a lot more on the horizon. At SIP.US, our SIP trunks are provisioned instantly and always come with a free trial. Our customer service is unmatched with our “No Tier 1 Group” for support at all; every representative on our support team has over five years of experience to make sure our clients get top-notch service every time. 

When you are ready to learn more, our experts are prepared to help you. Reach out to one of the excellent people on our team today!