With dozens of choices to make every day for your business, choosing between a VOIP connection and a landline system can be daunting. If you are still not sure of the ideal option for your business, this guide will help you compare VOIP versus Landline systems and pick the perfect choice.



Voice over Internet Protocol (VOIP) is also known as Internet telephony, Internet calling, IP telephony, or voice over network. With VOIP you use the internet to make and receive calls. Your voice signals are transmitted as packets of data through the internet via a cloud-based PBX (Private Branch Exchange) technology which routes the call.

VOIP providers offer two set up options:

  • Hosting the entire set up in the cloud
  • Selling your firm the hardware hosting the online system locally via an IP-PBX


Landline works through circuit switching via a Public Switched Telephone Network (PSTN). The phones are connected by routing. A landline is heavily dependent on hardware and uses a complex network of cables made of copper wires provided by a telecommunication company.

For an office environment, you need to install a PBX to use extensions for routing. The phone extension is the code map for routing a call. When you dial a number, it moves through several switches before reaching its destination in a matter of seconds.

The first three numerals represent the area code, the next three numerals represent the exchange, and the last four figures are the subscriber’s number.

Verdict: VOIP takes the crown for its advanced technology. Landline technology is becoming obsolete.




VOIP gives you low set up costs, minimal running costs, and cheap add-ons. Most VOIP providers offer long-term packages for future discounts making VOIP a reliable and pocket-friendly option. Monthly bills are also constant and are projected to decrease as the technology advances.


High set up costs- landlines are entirely dedicated to hardware, and you need to purchase phones plus other equipment. Landlines have high running and maintenance costs plus you pay more for additional features like service options or international calls. Monthly costs are dependent on taxes applied, going over on minutes and various fees charged.

Verdict: Regarding cost, VOIP takes the lead beating landlines by a landslide. Shifting to VOIP will give your business a clear win over your competitors.



Reliability is a measure of good performance.


VOIP is reliable and continues to evolve as compared to landlines which are becoming obsolete. The VOIP industry is expected to hit the $140 billion mark by 2021.

With over 99.99% uptime, 4G and 5G broadband to make your internet stable, IP telephony is a reliable long-term investment option. Current solutions are super reliable with zero jittery calls, disruptions or dropped calls.


Landlines are highly reliable because each user gets connected through a separate line resulting in a consistent performance. They are not limited to internet connection or affected by power outages unless you are using a cordless device. Landlines experience minimal disruption of services which is an excellent option for disaster scenarios and emergencies. Carriers promise 99.99% uptime.

Verdict: even though landlines are reliable even during emergencies with no interruptions, they are becoming obsolete with the Telkom sector investing heavily in VOIP making it far more reliable in long-term reliability and call connectivity



Internet telephony is a clear winner when it comes to offering feature-rich services. With VOIP, you can use your laptop, desk phone or mobile phone to make calls as long as there is an internet connection. Popular benefits of VOIP calling systems include;

  •    Call recording.
  •    Call analytics.
  •    Call forwarding.
  •    Mobility and portability.
  •    Auto attendants.
  •    Voicemail to email messaging and text.


A landline is connected to copper wires that connect to other landlines through networks known as POTS or PSTN. Users are limited to desk phones utilizing landline connections with minimal features available.

Verdict: VOIP takes the lead with a suite of options and features that a landline cannot match.

Audio Quality


Speed and quality of your broadband connection will have a significant impact on voice quality. Recent developments in VOIP have polished the sound quality though this is dependent on getting a reliable VOIP provider.

VOIP audio quality is variable and dependent on internet connection. With poor connection and internet distortion, you can expect a drop in sound quality. Leading to voice distortion, echoes dropped calls and interruptions which can significantly impact your message to your clients.


Landlines carry the trophy when it comes to audio quality. They offer quality communication. Landlines are the best tool for domestic calls and international business calls. Voice calls are clear, rarely suffering from poor quality, interference or dropped calls. They are not reliant on internet connection.

Verdict: with landlines, you get unsurpassed audio quality, but VOIP is making tremendous progress and soon catching up.



With VOIP you can seamlessly scale your system by upgrading to another plan or adding additional users even though you will need to purchase more phone lines, the cost to upgrade is significantly lower than using land lines.



With traditional landline phone systems which are heavily dependent on hardware, scalability is difficult because it requires additional phone lines and equipment which are disruptive and expensive to set up, run the system and maintain the system

Verdict: VOIP is the winner offering seamless scalability at minimum cost and hardware as compared to landlines



The security is dependent. VOIP is vulnerable, but this boils down to the organization’s security practices and that of the provider. VOIP is susceptible to malware and viruses, phishing attacks, call tampering and spamming.


With landlines, the PSTN is highly secure with data traveling across multiple copper lines via a PBX making it more secure from cyber attack.

Verdict: land lines are a step ahead with more secure network lines than VOIP, but with further advancements, VOIP will take the lead.

VOIP is reinvigorating how businesses interact with their clients. This advanced technology is an inexpensive and excellent solution to growing your business. According to the International data corporation, the benefits of VOIP have enticed nearly 75% of firms to adopt it. It’s time to upgrade your phone service.