Acceptable Jitter & Latency for VoIP: UK Business Guide (2026) Quick answer
For high-quality VoIP calls, UK businesses should aim for:
✅ Latency below 150ms
✅ Jitter below 30ms
✅ Packet loss below 1%
Exceeding these thresholds commonly causes:
robotic voices
delayed conversations
echo
choppy audio
dropped calls
In reality, VoIP call quality depends less on raw broadband speed and more on network stability, router quality, Wi-Fi congestion, and traffic prioritisation.
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Contents
What is latency in VoIP?
What is jitter in VoIP?
What is packet loss?
VoIP call quality thresholds
Why jitter & latency matter more than speed
How to improve jitter & latency for VoIP
How do we work?
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Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: May 2026
Key Takeaways
Latency, jitter and packet loss directly affect VoIP call quality
Low jitter is just as important as low latency
Business-grade broadband or leased lines perform best for VoIP
Wi-Fi congestion is a common cause of poor call quality
QoS configuration can dramatically improve VoIP performance
Remote and Teams-based calling increases network sensitivity
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What is latency in VoIP? Latency is the time it takes for voice data to travel from one caller to anothe and is measured in milliseconds (ms).
Acceptable VoIP latency
Excellent: under 100ms
Acceptable: 100–150ms
Poor: over 150ms
High latency causes:
Noticeable delay between speakers
Talking over each other
Echo and awkward pauses
What is jitter in VoIP? Jitter measures variation in packet arrival time, so even with low latency, inconsistent packet delivery causes choppy or robotic audio.
Acceptable VoIP jitter
Excellent: under 20ms
Acceptable: 20–30ms
Poor: over 30ms
High jitter causes:
Distorted voices
Audio dropouts
“Underwater” or metallic sound
What is packet loss? Packet loss occurs when voice data packets fail to reach their destination.
Acceptable packet loss for VoIP
Excellent: 0–0.5%
Acceptable: up to 1%
Poor: over 1%
Packet loss results in:
Missing words or syllables
One-way audio
Call drops
VoIP call quality thresholds
Metric
Latency
≤ 150ms
Jitter
≤ 30ms
Packet loss
≤ 1%
MOS score 4.0+ (out of 5)
Why jitter & latency matter more than speed Many businesses assume faster broadband equals better VoIP whereas, in reality, stability beats speed.
A 50Mbps stable connection will outperform a 900Mbps congested one for VoIP if:
Traffic is prioritised correctly
Latency is consistent
Packet loss is minimal
Common causes of poor VoIP quality
Congested Wi-Fi networks
Consumer-grade routers
No QoS (Quality of Service) rules
Running VoIP alongside large uploads/downloads
Home working on shared connections
Inadequate upstream bandwidth
How to improve jitter & latency for VoIP 1. Use wired connections where possible
Ethernet connections are far more stable than Wi-Fi.
2. Enable QoS on your router
Prioritise voice traffic over general internet usage.
3. Upgrade to business-grade broadband
Consumer broadband struggles with consistent latency.
4. Consider a leased line for call-heavy teams
Dedicated bandwidth eliminates contention – learn more here :
5. Separate voice and data traffic
Using VLANs or dedicated voice networks improves reliability.
Why jitter & latency matter more than speed Many businesses assume faster broadband automatically means better VoIP, but that is usually wrong.
A stable 50Mbps business connection will often outperform a congested 900Mbps consumer connection for VoIP calls, so the real priorities are:
✅ low latency
✅ consistent jitter
✅ low packet loss
✅ reliable upstream bandwidth
VoIP, Teams & cloud phone systems Modern platforms such as Microsoft Teams Phone, RingCentral, 8×8 and Cloud PBX systems rely heavily on stable network performance.
Poor jitter and latency often appear as:
“Teams call quality issues”
“Echo on RingCentral calls”
“Robot voice on VoIP”
(In most cases, the issue is network-related, not the provider)
Business types most affected by VoIP quality issues
Business Type Why It Matters
Call centres
Constant concurrent calls
Hotels
Guest experience
Sales teams
Missed conversations
Remote teams
Home broadband issues
Customer support teams
Poor customer experience
Multi-site businesses
VPN/network complexity
FAQs – Acceptable jitter & latency for VoIP What is acceptable latency for VoIP calls?
Under 150ms is considered acceptable. Below 100ms is ideal.
What is acceptable jitter for VoIP?
Anything under 30ms is acceptable and under 20ms delivers the best quality.
Is VoIP usable over standard broadband?
Yes, for small teams, but call quality depends on stability, not speed.
Why do VoIP calls sound robotic?
This is usually caused by high jitter or packet loss.
Does Wi-Fi affect VoIP quality?
Yes. Wi-Fi interference is one of the most common causes of jitter.
Do leased lines improve VoIP quality?
Yes. Leased lines offer guaranteed bandwidth and ultra-low latency.
Can poor jitter affect Teams calls?
Absolutely! Teams is highly sensitive to jitter and packet loss.
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Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
