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Home > Speedtest > Speed Test Definitions > Mos

MOS

Mean Opinion Score (MOS) is the overall measurement of the quality of a telephony service. In reference to your internet connection, MOS is a score that reflects the quality of voice communications such as VoIP, Skype, and other services that use your internet connection.​

Back to Internet Speed Test.

quality of service

What is MOS?

The score ranges from 1 to 5, with a theoretical maximum of 4.4 (because of overhead caused by codecs used to encapsulate voice over the wire). It is calculated by average latency, average jitter, and packet loss.

A = (latency + jitter) * 2

If A < 160 then B = 93.2 - ( A / 40 )

If A >= 160 then B = 93.2 - ( A - 120 ) / 10

C = B - ( packet loss * 2.5 )

MOS = 1 + (0.035) * C + (.000007) * C * (C-60) * (100-C)

A MOS score above 4.0 should support most VoIP applications, provided the bandwidth is also available.

Find out how much you can save today on Business VoIP

Compare top Business VoIP providers in the table below

Provider Plan Features Rate/min. Trial Period Setup Fees Monthly Fees Details
RATED #1 BY INDUSTRY EXPERTS
  • Includes 100+ Premium Features
  • Unlimited Calling, Faxing, SMS, Conferencing
  • Trusted by over 350,000 Businesses
30 Day Trial with same day activation

$0.00

30 day trial available to new subscribers with 2+ users.

Free

$ 19.99 /mo. *

CLOUD VOIP TAILORED TO YOU
  • Free Polycom phones + 30 day trial
  • Unlimited calling with easy setup
  • US-based customer support
5 user minimum

$0.00

30 days

Free

$ 18.95 /mo. *

Upgrade your phone service with Jive Voice
  • Very simple to use for admins and users
  • Get your first month free
  • No fees for upgrades, features or add-ons
Price is per month per device.

$0.00

30 days

Free

$ 19.95 /mo. *

CUT YOUR BUSINESS PHONE BILL IN HALF
  • Work From Anywhere. FREE Mobile App
  • Keep Your Existing Business Phone Number
  • Unlimited Calling and SMS/MMS messaging
plus taxes and fees

$0.00

-

Free

$ 19.95 /mo. *

Get The First Fully Programmable Contact Center Platform
  • A cloud-based contact center platform that’s infinitely flexible and instantly deployable
  • Flex delivers what you need to run an omnichannel contact center out-of-the-box.
  • Deploy and customize discrete components to match your exact business needs
click for details

$0.00

-

Free

$1/user
Business Phone Service That's More Than Just Talk
  • Voice service that works on any device.
  • Packages to meet your specific needs
  • 24x7 US-based, bilingual, expert support.
$9.99/month on the annual plan

$0.00

-

Free

$ 9.99 /mo. *

Business VoIP Made Clear and Simple
  • Unlimited Calling & Flat Rate Billing
  • Over 40 Enterprise Class Calling Features
  • No Contract, Quick & Easy Setup
Price based on multi-user hosted PBX solution

$0.00

14 Day Risk Free Trial

$0.00

$ 14.99 /mo. *

Hosted PBX
  • Telephone lines/numbers available in 50 countries
  • All features included in user subscription fees
  • Web Control Panel for all users
Price per user per month

$0.00

30 days

Free

$ 19.99 /mo. *

Alliance Phones
  • Simple set-up in less than 30 minutes
  • Efficient daily call report
  • Easy-to-use control panel
12% discount for subscribing and paying for a year upfront.

$0.00

30 days

Free

$ 19.97 /mo. *

*Rates shown do not include E-911 charges, taxes, and surcharges. Most providers offering unlimited calling have restrictions and some rates shown are promotional rates based on term contracts or promotional periods. Be sure to read individual providers terms and conditions before you buy. Rates and features displayed for each provider have been sourced from provider's site and other online sources. While we strive to display current information, be sure to check directly with each provider as their plans, pricing, and features are subject to change.
Find out how much you can save today on Residential VoIP.

Compare top Residential VoIP providers in the table below

Provider Plan Features Rate/min. Trial Period Setup Fees Monthly Fees Details
Home Phone Service
  • Unlimited USA and Canada calling
  • Free hardware and activation
  • Money back guarantee, 30+ features
$6.25/mo. 1-year prepay equals $75.00/year

$0.00

15 days

Free

$ 6.25 /mo. *

4.05

54 reviews

Home Phone Service
  • Unlimited calling
  • Cellular phone compatible
  • 60 free international minutes
$8.33 is monthly average with 1-year prepay

$0.00

30 days

Free

$ 8.33 /mo. *

*Rates shown do not include E-911 charges, taxes, and surcharges. Most providers offering unlimited calling have restrictions and some rates shown are promotional rates based on term contracts or promotional periods. Be sure to read individual providers terms and conditions before you buy. Rates and features displayed for each provider have been sourced from provider's site and other online sources. While we strive to display current information, be sure to check directly with each provider as their plans, pricing, and features are subject to change.
Find out how much you can save today on Wholesale VoIP

Compare top Wholesale VoIP providers on the table below

Established in 2007, VoIP Innovations brings success to its customers through Wholesale VoIP services. They are an industry leader in Wholesale VoIP, and have been aggregating, innovating and...
API, Calling Card, Colocation, E911, International A-Z, Origination, Portal, Termination, Toll Free
4.3

9 reviews

A nationwide provider in the VoIP and ISP provider industries, Alcazar Networks has been providing technology solutions since 2003. They aim to deliver products that will help businesses increase...
API, Calling Card, E911, International A-Z, Origination, Portal, Termination, Toll Free
Commpeak specializes in bringing VoIP termination to providers, call centers, and businesses all over the world. Their overall goal is to give businesses of all sizes access to wholesale VoIP at a...
Calling Card, International A-Z, Origination, Portal, Termination, Toll Free
1.5

2 reviews

DIDforSale gives customers the ability to get an optimum VoIP solution that can provide opportunities for their businesses around the world. The company offers affordable rates on an optimized...
API, Calling Card, Colocation, E911, International A-Z, Origination, Portal, Termination, Toll Free
4.2

5 reviews

*Rates shown do not include E-911 charges, taxes, and surcharges. Most providers offering unlimited calling have restrictions and some rates shown are promotional rates based on term contracts or promotional periods. Be sure to read individual providers terms and conditions before you buy. Rates and features displayed for each provider have been sourced from provider's site and other online sources. While we strive to display current information, be sure to check directly with each provider as their plans, pricing, and features are subject to change.

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