How to Achieve Highest Quality VoIP Calls

Despite impressive technological advancements, recruiters using VoIP systems regularly encounter call quality challenges that can derail crucial candidate conversations.

Recruiters often face significant call quality degradation during peak business hours when network traffic reaches its maximum. VoIP systems typically require 100 Kbps upload and download bandwidth per concurrent call, with multiple simultaneous calls demanding proportionally more. Notably, if your recruitment team has five members all conducting interviews simultaneously, you'll need at least 500 Kbps of dedicated bandwidth.

A congested network leads to queuing delays that result in higher latency, consequently affecting your ability to assess candidates properly. Furthermore, when bandwidth is exhausted, your VoIP system automatically falls back to lower-quality audio formats to maintain the connection.

Jitter is the variation in packet delivery times—creates those frustrating moments when candidate responses sound choppy or robotic. Acceptable jitter levels should remain below 30ms, though many recruitment calls experience higher levels during busy periods.

Packet loss occurs when data packets fail to reach their destination, resulting in dropped syllables or missing parts of conversations. Even 1% packet loss can make conversations difficult, while losses exceeding 5% significantly reduce call quality.

Latency introduces awkward delays between when candidates speak and when recruiters hear their responses. While latency below 150ms remains acceptable, higher levels create uncomfortable situations where both parties inadvertently speak over each other.

This issue becomes particularly problematic during behavioral interviews where assessing communication skills is paramount. Candidates may appear hesitant or unprofessional when actually suffering from technical delays.

Outdated hardware substantially contributes to poor VoIP performance. Old headsets, microphones, or desk phones can introduce echo, buzzing, or garbled audio. Similarly, wireless networks remain vulnerable to interference from everyday office equipment like microwaves and electrical motors.

Firewall configurations that analyse incoming voice packets contribute to network latency, while improperly configured Quality of Service (QoS) settings fail to prioritize interview calls over less critical network traffic.

Achieving highest quality VoIP begins with the right technical infrastructure. After identifying the common call quality challenges, let's explore practical solutions that transform your recruitment calls from problematic to professional.

Proper network setup creates the foundation for crystal-clear recruitment calls. For optimal VoIP performance, ensure your internet connection provides at least 100 Kbps bandwidth per concurrent call. In busy recruitment periods, a higher bandwidth allocation prevents congestion-related issues.

As a rule of thumb, use only 80% of your available bandwidth for all activities, VoIP included. This buffer helps maintain consistent call quality even during peak usage. Moreover, implement a Virtual Local Area Network (VLAN) to separate voice traffic from other data, creating dedicated pathways for your recruitment calls.

Although wireless connections offer convenience, wired Ethernet connections provide substantially better stability. Cat 6 cables support up to 10 Gigabit Ethernet at 250 MHz, ensuring your network infrastructure can handle high-quality audio without interference.

QoS settings essentially act as traffic control for your network, prioritizing voice packets over less time-sensitive data. This prioritization ensures recruiters' calls remain crisp and clear even when other network activities compete for bandwidth.

Configure your router to mark VoIP traffic with DSCP 46 high priority, which instructs your network to process these packets first. For recruitment teams, QoS implementation directly impacts the candidate experience, reducing chances of misunderstandings during critical interviews.

The "de-jitter buffer" technique minimizes variations in packet delivery times by collecting Real-Time Protocol audio streams before processing. Additionally, traffic shaping smooths out bursts of data, preventing sudden spikes that can disrupt interview flow.

Investment in quality hardware pays dividends in recruitment call clarity. Choose VoIP-compatible routers supporting QoS settings that optimize bandwidth allocation specifically for voice traffic.

Purchase high-quality wired headsets rather than wireless models, as the latter often suffer from adapter configuration issues causing static or white noise. Furthermore, consider VoIP desktop phones with built-in displays for caller identification, which helps recruitment teams manage multiple candidate communications effectively.

For recruiters working remotely, create a dedicated quiet workspace to ensure voice clarity. Remember that environmental factors significantly impact call quality regardless of technical specifications.

Always have backup communication options prepared when scheduling candidate interviews, as technical issues can arise unexpectedly. Certainly, test your internet speed, jitter, and latency before important candidate calls using VoIP testing tools.

Finally, leverage the analytical capabilities of your VoIP system to track recruiter performance, identifying areas for improvement before minor issues expand into major problems.

Paññã Recruit was designed with a simple goal to make conversations effortless. Not just by enabling calls, but by ensuring every voice, pause, and inflection comes through exactly as intended. Because recruiters don’t want to manage call settings or troubleshoot lag—they want to connect with people.

From the ground up, we engineered the software to handle the nuances of call quality automatically. Intelligent bandwidth management, QoS prioritization, and built-in safeguards work silently in the background, delivering smooth, high-fidelity calls at scale, so recruiters can stay focused on hiring calls.

When candidates are met with clean, uninterrupted audio, the conversation feels immediate and human. There’s no guessing, no asking someone to repeat themselves, no friction in the flow. This boosts trust and confidence—helping candidates show up as their best selves, and view your organization as one that’s sharp, modern, and attentive.

On Paññã Recruit, every call is delivered in HD voice, preserving vocal nuance and tone. That extra clarity often reveals things that scripted answers won’t—like confidence, thoughtfulness, or hesitation. The result? Deeper evaluations and fewer misreads, even in complex interviews like behavioral or cultural assessments.

All calls on Paññã Recruit are backed by VoIP-native analytics tailored for recruiting. Teams can review high-quality recordings, monitor engagement patterns, and use real-time insights to refine their hiring process. No distractions, no unclear audio—just clean data that leads to faster decisions and more aligned hiring choices.

High-quality VoIP calls stand as a cornerstone of modern recruitment success. Through our exploration of VoIP technology, we've seen how proper network optimization, quality hardware, and strategic implementations directly impact candidate experiences.

Statistics also prove this point - while traditional phone systems struggle with consistency, VoIP delivers up to 45% cost savings alongside superior call clarity. These benefits multiply when recruitment teams prioritize bandwidth management and implement recommended QoS settings.

Paññã Recruit as an AI-powered Recruiter calling platform offers advanced VoIP solutions designed specifically for recruitment teams, ensuring every candidate conversation happens at the highest possible quality.

Good communication is key to successful hiring. Start using these tips to improve your VoIP calls today, and you’ll have better conversations with candidates, leading to smarter and faster hiring decisions.