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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
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. *

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. *

Upgrade your phone service with GoToConnect
  • 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. *

The #1 VoIP solution for remote teams.
  • Work from anywhere with mobile & desktop apps
  • Stay connected with video meetings
  • Manage users easily with intuitive admin portal
plus taxes and fees

$0.00

-

Free

$ 19.95 /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
VoIPo Home Phone
  • Unlimited Calls to US/Canada
  • Over 45 Features + Free 2nd Line
  • Free international call allowance
$15.00/mo. or $6.21/mo. with 2 year contract

$0.00

30 days

Free

$ 6.21 /mo. *

HOME PHONE SERVICE
  • Unlimited Calling and Free Adapter Included
  • No Contract or Cancellation Fee
  • Over 40 Included Features
$8.97 is monthly cost with 1-year prepay

$0.00

-

Free

$ 8.97 /mo. *

4.9

3 reviews

HOME PHONE SERVICE - NO INTERNET REQUIRED
  • Special: Save on hardware & low monthly rates!
  • No annual contracts, 30-day money back guarantee
  • Unlimited nationwide calling
*Not including taxes/fees + One-time hardware cost of $69.99.

$0.00

30 days

Free

$ 11.99 /mo. *

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

56 reviews

Modern Landline Service
  • No internet required, works even during power outages.
  • Setup is as easy as connecting a charger to a phone, anyone can do it.
  • Unlimited local and long-distance calling.
Device contains a backup battery and is not designed to run without electricity indefinitely.

$0.00

30 days

$99.00

$ 36.50 /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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