Jitter

Jitter is a measurement of variation in consecutive latency test results, and is represented as an absolute value. Ideally, one would want a jitter result as close to zero as possible.

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What is Jitter?

For example, a latency test is started by using the ping command to a server on the internet with the following results:

First latency test is 30ms | No jitter can be calculated with only one latency result.
Second latency test is 35ms | 35ms - 30ms = 5ms of jitter
Third latency test is 32 | 32ms - 35ms = 3ms of jitter
Fourth latency test is 50ms | 50ms - 32ms = 18ms of jitter

Jitter is considered to be bad when it is more than 20% of your average latency. Since latency tests require the use of bandwidth, a sudden burst in download or upload usage can cause a larger latency result and, in turn, affect your jitter results. The use of Wi-Fi will also have a large impact on latency and jitter because it is affected by interference and objects blocking line of sight to the Wi-Fi device.

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Provider	Plan Features	Rate/min.	Trial Period	Setup Fees	Monthly Fees	Details
RingCentral	RATED #1 BY INDUSTRY EXPERTS Includes 100+ Premium Features Unlimited Calling, Faxing, SMS, Conferencing Trusted by over 350,000 Businesses As low as, per month/user	$0.00	14 day trial available to new subscribers	Free	^$ 19.99 _/mo. * Core Advanced Ultra Month to Month (per user) $30/user/mo Annual Contract Paid Monthly (per user) $20/user/mo Annual Contract Prepay (per user) $20/user/mo Month to Month (per user) $35/user/mo Annual Contract Paid Monthly (per user) $25/user/mo Annual Contract Prepay (per user) $25/user/mo Month to Month (per user) $45/user/mo Annual Contract Paid Monthly (per user) $35/user/mo Annual Contract Prepay (per user) $35/user/mo In order to determine the number of users you need for your RingCentral phone system, count the total number of devices you need, including desk phones, softphones, conference phones, and fax machines.	4.1 142 reviews Get Quote!
Alliance Phones	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. * Effortless Plus Simplicity Plus Easy Plus Month to Month (per user) 20 - 100 users $19.97 /mo. Annual Contract Prepay (per user) 20 - 100 users $17.58 /mo. x 12 Month to Month (per user) 4 - 20 users $24.97 /mo. Annual Contract Prepay (per user) 4 - 20 users $21.98 /mo. x 12 Month to Month (per user) 1 - 3 users $29.97 /mo. Annual Contract Prepay (per user) 1 - 3 users $26.38 /mo. x 12 In order to determine the number of users you need for your Alliance Phones phone system, count the total number of devices you need, including desk phones, softphones, conference phones, and fax machines.	5 13 reviews Get Quote!
Nextiva	Simple, Affordable VoIP Phone Service. Unlimited calling No commitments or contracts Low rates & US support As low as, per month/user	$0.00	-	Free	^$ 17.95 _/mo. *	4.1 194 reviews Get Quote!
Talkroute	The phone system built to do business anywhere Video Meetings & Text Messaging Call Forwarding & Routing Desktop, Mobile, & Web Apps $5 per additional user	$0.00	-	Free	^$ 19.00 _/mo. *	5 1 review Get Quote!
BryteCall	Business VoIP Made Easy First 2 months free Exceptional technical support Upgraded equipment included per user for 10+ users, with 2 year agreement	$0.00	-	Free	^$ 18.90 _/mo. *	0 0 review Get Quote!
Verizon Business VoIP	Get 99.99% network reliability with Fios. Business Digital Voice 1-year price guarantee Unlimited data Per month. Plus taxes, fees and equipment charges.	$0.00	-	Free	^$ 69.00 _/mo. *	1.35 56 reviews Get Quote!

*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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Provider	Plan Features	Rate/min.	Trial Period	Setup Fees	Monthly Fees	Details
VoIPo	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. * Residential Month to Month (per user) No contract $15.00 / mo. Annual Contract Prepay (per user) 2-year contract $6.21 / mo. In order to determine the number of users you need for your VoIPo phone system, count the total number of devices you need, including desk phones, softphones, conference phones, and fax machines.	3.65 49 reviews Get Quote!
1-VoIP	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. *	4.95 5 reviews Get Quote!
Axvoice	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. * Home Phone USA/Canada US/Canada 200 Pay As You Go Month to Month (per user) No contract $14.99 / mo. Annual Contract Paid Monthly (per user) 1-year postpay $10.99 / mo. Annual Contract Prepay (per user) 1-year prepay $6.25 / mo. Month to Month (per user) No contract $9.99/mo. Annual Contract Prepay (per user) 1-year postpay $5.99/mo. Month to Month (per user) No contract $4.99 / mo. In order to determine the number of users you need for your Axvoice phone system, count the total number of devices you need, including desk phones, softphones, conference phones, and fax machines.	4.25 75 reviews Get Quote!
Community Phone	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	$99.00	^$ 32.50 _/mo. *	5 7 reviews Get Quote!

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Provider	Summary	Features	Ratings
VoIP Innovations	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 Get Quote!
Alcazar Networks	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	5 1 review Get Quote!