What is POTS?

If you are reading this article thinking that we’ll discuss cookware or the latest Rachel Ray recipe, you’ve come to the wrong place. At VoIP Tech Chat our mission is simple — we’re here to chat about VoIP. Think of it as Coffee Talk, without the coffee or infatuation with Barbara.

Sometimes, to discuss VoIP, we must discuss what VoIP is not — in this case, VoIP is not POTS.

POTS is the common nickname and acronym for Plain Old Telephone Service – you know, the “traditional” phone jack in your wall. The POTS system uses technology that is basically unchanged since the early 1900’s. The wires may be upgraded, sure there’s more features, but the telephone technology in use via POTS is essentially the same technology introduced before there were airplanes, highways, or even household refrigerators.

Background, aka Trivial Knowledge that Patrick would call Interesting

The telephone was invented by Alexander Graham Bell, who along with Thomas Edison, created a method of transferring voice over long distance through the use of connecting wires. Basically, one telephone would be physically connected to another.

Operators manually connected the two-parties together allowing the transfer of voice to occur. Human operators have since been replaced with automatic exchangers; where a computer determines the party you are wishing to talk to and making the connection. This device for automatic transfer is sometimes referred to as a telephone switch and the POTS engineers like to call their telephone network a Public Switched Telephone Network, or PSTN.

VoIP vs POTS

At VoIP Tech Chat, we are huge (no fat jokes please) proponents of Voice over Internet. Go Know. Of course, if we didn’t believe so strongly in Internet Telephone, then having a VoIP Tech Chat website would be a pretty stupid idea.

VoIP differs from POTS in many ways. Fundamentally, the end result is the same. In both systems you pick up a phone, dial a number, and talk to the other party. Other than that, the systems are extremely different. VoIP is digital and does not use wires to physically connect devices. VoIP works by digitzing your voice, sending it over the Internet to the destination, and then having it return to audio on the other side. (If you haven’t done so, you should really read “What is a VoIP?” by Patrick and Fred. It’s a great read and even mentions George Michael)

Like anything, both VoIP and POTS have their own Pros and Cons. Despite POTS technology remaining virtually unchanged since the early 1900’s, the reliability of POTS is unmatched. In fact the level of reliability achieved by POTS is the quintessential “five nines” reliability standard. This means, that with POTS, you can expect to have an outage for less than 6 minutes a year. (That’s why at&t and Verizon engineers make big change)

Now, let’s contrast five nines reliability to VoIP reliability. First, remember that VoIP requires a synergy of several service providers to get a dial tone. (Editor note: first quintessential and now synergy? Wow. Today must be vocab day at Voip Tech Chat) The two main players in VoIP are your Internet Service Provider and your VoIP Service Provider.

Let’s say for example that you were using Vonage as your VoIP provider and Comcast as your ISP. Comcast home Internet service has a 99.9% uptime average; which is very high for the industry. In fact, it would be hard pressed to find an ISP that provides you better than 99.9% uptime. Of course, even though 99.9% uptime is amazing, this translates to 44 minutes of downtime per month. Vonage doesn’t list their uptime average (in their defense, most VoIP companies do not list their uptime. We couldn’t find any for Vonage, VoIP.com, or Packet 8.). So, let’s assume Vonage has a 99% uptime (which is being generous according to the posts we read from users). This translates to an additional 7 hours of outage per month.

For reliability, there is no better choice than POTS. (Which is why many people keep a landline active for 911 service) But if you’re an average phone user willing to weigh Cost against Reliability, VoIP starts to look amazing. Of course, we’ll cover VoIP advantages in another article.