What is voip

VoIP is hugely popular for voice, video & text (chat) among public, private and business users.
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What is VoIP

General Manager – Lauren Killeen on VoIP


Traditionally calls were made over physical IDSN, PSTN Lines that would allow incoming and outgoing calls.

VoIP replaced physical lines with virtual lines called SIP Trunks and calls are made over your internet connection.
VoIP is hugely popular today and for good reason: cost, failover options, and extra functionality including facilitating remote working, chat, video, and reporting.

If you are a business that relies on your phone system for communication, if you pay high line rental or require more from your phone system then VoIP is a really good option for you.


Voice over Internet Protocol (VoIP) technology is where an internet connection is used to replace a landline to host telecommunications.

VoIP systems are highly extensible, cost-effective, reliable & efficient. Talk to SenSys VoIP experts to find out more.

FAQ Voip

We have put together a list of some of the frequently asked questions we receive about VoIP


Voice over Internet Protocol (or ‘VoIP’ for short) technology is where an internet connection is used to replace a landline to host telecommunications. So, instead of your phone operating using a traditional line coming into the premises, it connects to calls using the internet.
VoIP is hugely popular for voice, video & text (chat) among public, private and business users.

Find out more on VoIP-info.org

How Does VoIP work?

Using a good internet connection (broadband preferably), the ‘data’ from voice messages are bundled into internet packets and sent to the recipient, where they are then unbundled. The technology is applied to calls, chats, video (web conferencing) such as google chat, Whatsapp, Skype, Zoom to enable reliable, low cost communications.
To explain VoIP in more detail – read up on SIP trunks and how they work

How is VoIP different from a traditional landling?

Here are the main differences between a traditional landline phone system (Public Switched Telephone Network /PSTN) and VoIP.


Physical dedicated lines or ‘cordless’
Features such as call waiting, Caller ID and so on are usually available at an extra cost
Can be upgraded or expanded with new equipment and line provisioning
Hardwired landline phones (those without an adapter) usually remain active during power outage
All channels carried over one virtual line over the Internet connection
Features such as call waiting, Caller ID and so on are usually included free with service. Read about features here
Upgrades usually requires only bandwidth and software upgrades. VoIP systems are highly extensible with the use of free and paid plugins.
Find out more about cloud hosted phone systems here.
Power loss, back-ups and failover solutions are built in. Discover how 3CX failover works here.
Customisable dashboard / wall board for analytics
Staff can work from anywhere using their business extension
Save on call costs by lowering mobile & customer service number bills-
Discover even more about the functionality of a 3CX phone system here
DECT phones
Both PSTN and VoIP can be used with Digital Enhanced Cordless Telecommunications (DECT) phones.
These phones normally have a handset, base, cordless functionality and support sound enhancement, answer machine, voicemail, phone book and caller ID.

How does the voice clarity of VoIP compare to traditional telephony?

Poor call quality creates a bad impression for anybody you do business with on the phone. It’s the last thing you want to experience with your phone provider.
SenSys Technology understands your business demands dial tone reliability with crystal clear conversations – so how do we achieve this?


  • We partner with world-leading SIP trunk and VOIP telco’s that provides the best in class communications.
  • SenSys recommend segmenting a section of your broadband bandwidth on your router for the sole use of your phone system
  • Tier 1 Irish call routes
  • Two independent Irish data centres
  • High-quality voice technology
  • We recommend high quality voice handsets / headsets

Can I keep my phone number and use VoIP?

Yes, there is an agreement with all major telecoms companies that allow you to port in and out numbers.
SenSys Technology work closely with providers to manage the complete migration and guarantee zero down time for your business communications.


How fast does my internet connection have to be?

The broadband speed requirement is dependent on the number of concurrent calls.
The following table highlights the typical broadband speeds required when using a dedicated broadband connection for voice. It’s important to note that this is the speed required purely for voice usage. SenSys Technology will advise on the correct broadband connection for VoIP.

Number of concurrent calls Speed required (upload & download)
1 100.00 Mbps
5 500.00 Mbps
10 1000.00 Mbps
20 2000.00 Mbps
100 10000.00 Mbps

Try this FREE calculator

Lines to VoIP bandwidth Calculator

Need to do more research? Start with these two articles:

VoIP Bandwidth: How Much Do You Need?

How Much Bandwidth Does VoIP Technology Require?

How to check your broadband speed test?

There are numerous providers out there for performing a speed test on your computer. Please take note of both the download and upload speeds.

Talk to us about getting your own dedicated IT guy and discover how SenSys Technology can manage firewall settings to ensure that your voice call quality is excellent.
Check out our other pages:
Click here to visit our IT Consultancy page
Click here to view SenSys Tech cloud services

How reliable is VoIP?

The number 1 concern for business customers is availability. VoIP solutions can offer 99.999% uptime ensuring their reliability.
It is only natural to have concerns regarding the reliability of any new service, especially the one that will provide your business communication solutions.

However, if something ever goes wrong with your own broadband connection, SenSys Technology configure your VOIP phone system that it automatically fails over to another branch office or your mobile(s) to keep your incoming calls working.
Discover how 3CX failover works

On-going support and service from SenSys CARE 24/7/365. Our technical team provides preventative maintenance, tech support and system health monitoring for voice & data systems. Call us on 1800 815 683

read Our VoIP blog

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SenSys Voice

10 Common questions about VoIP

VoIP – SenSys Technology are experts in Voice Over Internet Protocol. Discover the features and benefits of VoIP and what it can do for your business.

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Our telephone system maintenance is a service that helps you to reduce your organisational costs, minimise the risk of downtime, loss of business and allows you to gain the convenience of a single point of contact for the support of your telephone system.

Amongst the regular support are jobs such as updates/repairs/patches to any handsets, cloud servers, and upgrading software, operating systems, and the firmware’s on IP handsets and servers. Remote softphone and mobile app support upgrade, and, web conferencing updates/updates. SenSys Tech can also take care of issues with power supplies.

Need to get your team up and running working from home or on the road? Do you need help or training with systems, integrations, scheduling or dashboards?

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