Let’s Get Technical: An Introduction to Telecommunications Terms

| February 28, 2019
An introduction to the language of Telecom Lingo.

Telecommunications, Cloud PBX, SIP Trunking, Primary Rate Interfacing, Direct Inward Dialing, say whaaaaaa?

Technology is vital, always changing and advancing, which can make it difficult to keep up with. Especially, when it comes to Telecommunications lingo.

It’s time to step up and step out of the stone ages! Say goodbye to copper wires, dropped calls, and headsets.

Now comes the question of what exactly is Voice over IP (VoIP) and what are all those crazy words I see, and that’s what we are here to talk about.

When it comes to learning about a hosted voice provider there are a lot of words you may see, but not really understand what they mean. Such as VoIP, Cloud PBX, SIP Trunking, Data Management, and so many more. Here is a list of keywords in Telecommunication basics that we want you to understand:

  • VoIP
  • Cloud PBX
  • Cloud SIP Trunking
  • PRI (Primary Rate Interface)
  • DID (Direct Inward Dialing)
  • Bandwidth
  • Data Management
  • Fiber Optic Connectivity
  • Firewall

So, first, let’s start by talking about what VoIP really is and what it stands for!


What is a VoIP?

Voice over IP (VoIP) is the most common method of making phone calls over the internet. This is in contrast to traditional telephone services, where communication is over PSTN (Public-Switched Telephone Network).

What does VoIP stand for?

Fantastic question!
VoIP is an acronym for Voice Over Internet Protocol or in simpler terms a phone service over the internet.

How does VoIP work you may ask, well let us explain:

A VoIP communication system basically works by converting your human voice into digital data and sending it through your internet connection. So, instead of your voice passing down a basic phone line, it passes through your router.

Cloud PBX

What is a Cloud PBX

Cloud computing refers to the act of storing data over the Internet and having free access to it rather than on a computer or external hard drive. The term “cloud” or “cloud computing” refers to a technology that allows applications and services to be accessed over a network such as Internet opposed to being run locally.

What does PBX

Great Question!
PBX is an acronym for Public Branch Exchange. The PBX part of the cloud service is the technology behind telephone service providers ability to route calls.

PBX is a telephone exchange that serves a particular business or office, as opposed to one that a common carrier or telephone company operates for many businesses of the general public.

Together, they make Cloud PBX which is simply an internet-based phone system. This is also sometimes referred to as a Voice over IP (VoIP) phone system.

Cloud SIP Trunking

What is Cloud SIP Trunking?

In telecommunication jargon, “trunking” is when tangible electrical lines attached switching equipment to one another. This is exactly what SIP Trunking does; it acts as a virtual connection between an organization and the Internet.

What does SIP stand for?

Another great question!
SIP is an acronym that stands for Session Initiation Protocol. SIP trunks replace older PSTN
(Public Switched Telephone Network).

Primary Rate Interface (PRI)

What is PRI?

PRI is a telecommunication standard for carrying multiple voice and data transmissions between a network and a user. This is where the T1 circles back around, and again not talking about the first Terminator movie. A PRI circuit consists of two pairs of copper lines terminating on a modem to form a service provider.

Direct Inward Dialing (DID)

What is DID?

Direct Inward Dialing is a service for a local phone company (or local exchange carrier) that provides a block of telephone numbers for calling into a company’s Private Branch Exchange (PBX) system.

What does that mean?

Using a DID, a company can offer its customers individual phone numbers for each person or workstation within the company without physical line into the PBX for each possible connection.


Bandwidth refers to the maximum amount of data that be transmitted via an internet provider over a certain period of time.

Bandwidth is a measure of available or consumed data communication resources expressed in bit(s) or multiples of it.

Data Management

What is Data Management when dealing with a service provider?

At Planet 1 Networks you gain more than data network management provider with powerful technology and resources.

Internet access for voice and data networking has become an essential requirement for the modern business enterprise. With rapidly changing technology comes greater network demands and increasing bandwidth requirements. Planet 1 Networks is here to assure your data and networking optimum results.

Fiber Optic Connectivity

What does Fiber Optic mean?

Through fiber, you get the highest reliability, speed, and dedicated bandwidth capacity that can grow with your business as more data is pushed to the cloud.

Whether your connection is wired or wireless with an air-fiber circuit, Planet 1 Networks can bring your access to life. With our fiber-optic network, you can improve efficiency by converging voice and data over the same transport with the ability to layer other cloud services.


Let’s start by clarifying this is not an actual wall and the fire is theoretical. Now that we have that cleared up, let me tell you about computer firewalls and their importance.

A firewall is a device (software and hardware) which protects a user’s internal network from an outside network. Firewalls are commonly used when a business connects to the internet.

So there you have it. Have some other telecom words you think might be helpful to understand? Let us know!