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Phone Number Monitoring

Feature Deep Dive

Line Quality Monitoring

Line Quality Monitoring addresses a critical gap in traditional phone monitoring: it is not enough to know that a conference line answers — you need to know that participants can actually hear each other clearly. PNM’s dual-line methodology solves this by simulating the full conference experience.

PNM dials into your conference bridge with two separate lines simultaneously. The first line plays a precisely calibrated reference audio recording. The second line listens and records what is received. PNM then compares the received audio against the original reference, measuring six key quality dimensions: audio clarity, latency/delay, distortion, packet loss, background noise, and volume levels. The result is an objective quality score with detailed per-metric breakdowns.

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Line Quality Monitoring illustration
6+ Quality MetricsMeasure call quality using multiple key metrics
Dual-Line TestingSimultaneous testing on two lines for accuracy
Supports Any Conference PlatformCompatible with all major conferencing solutions
Real-Time Quality ScoringMonitor and score call quality instantly

Test Every Path, Avoid Every Failure

What is Line Quality Monitoring?

  • Dual-line conference bridge testing methodology
  • Audio clarity and intelligibility measurement
  • Latency and end-to-end delay measurement
  • Distortion and audio artifact detection
  • Packet loss and dropout detection
  • Background noise level measurement
  • Volume level and dynamic range analysis
  • Reference audio comparison with quality score
  • Works with any multi-party conference room setup
  • Instant alerts when quality drops below thresholds
  • Historical quality trend dashboards
  • Scheduled quality reports

Everything You Need

A complete toolkit designed to give you full visibility and control over your phone line performance.

Dual-Line Test Methodology

PNM joins your conference bridge with two lines simultaneously — one to play a reference recording, one to listen — simulating the real participant experience.

Reference Audio Comparison

The received audio is compared against the original reference recording using advanced signal analysis to produce an objective quality score.

6-Dimension Quality Scoring

Each test measures audio clarity, latency, distortion, packet loss, background noise, and volume levels — giving a complete picture of audio quality.

Latency & Delay Measurement

Precisely measure end-to-end audio delay through the conference bridge. Detect latency spikes that make conversations difficult or impossible.

Platform Agnostic

Works with any conference room setup intended for multiple participants — Zoom, Microsoft Teams, WebEx, Cisco, traditional PSTN bridges, and more.

Quality Threshold Alerts

Set minimum quality thresholds for each metric. Receive instant alerts when audio quality drops below acceptable levels before your next meeting.

Historical Quality Trends

Track quality scores over time to identify degradation patterns, correlate issues with infrastructure changes, and plan maintenance proactively.

Scheduled Quality Reports

Receive automated quality reports on a daily, weekly, or monthly schedule — keeping stakeholders informed without manual testing.

Simple Setup

How It Works

Simple to set up, powerful in practice. Get started in minutes with no hardware required.
01

Configure the Test

Enter your conference bridge dial-in number and access code. Upload or select a reference audio recording for the quality test.

02

PNM Joins with Two Lines

At the scheduled time, PNM dials into your conference bridge simultaneously with two separate lines — the play line and the listen line.

03

Audio Is Played & Captured

The play line broadcasts the reference recording into the conference. The listen line records what is received on the other end of the bridge.

04

Quality Is Scored & Reported

PNM compares the received audio against the reference, calculates quality scores for all 6 metrics, and delivers results with alerts if thresholds are breached.

Why Teams Choose This Feature

  • Detect conference audio quality issues before your next meeting — not during it
  • Eliminate subjective ‘the audio sounded bad’ complaints with objective quality scores
  • Identify whether quality issues originate in the conference bridge, network, or endpoints
  • Prove audio quality SLA compliance to clients with timestamped quality reports
  • Reduce support tickets from conference audio complaints with proactive monitoring
  • Correlate quality degradation with infrastructure changes to identify root causes
  • Support capacity planning by tracking quality trends during peak usage periods

Ready to get started?

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Real-World Applications

Who Uses This Feature

Trusted by organizations across industries that depend on reliable phone communication.

Corporate IT & AV Teams

Proactively verify conference room audio quality before executive meetings, board calls, and all-hands events. Detect issues hours before they matter.

Conference Room Providers

Continuously monitor the audio quality of your hosted conference bridge services. Identify infrastructure degradation before customers complain.

Telecom & UCaaS Providers

Validate audio quality across your conferencing infrastructure. Use quality data to identify network segments causing degradation.

Healthcare Telemedicine

Ensure telehealth conference lines deliver clear audio for patient consultations. Poor audio quality in medical settings can have serious consequences.

Legal & Financial Services

Verify that client conference calls, depositions, and earnings calls meet audio quality standards for recording and compliance purposes.

Managed Service Providers

Include conference line quality monitoring as part of your managed communications service offering, providing clients with objective quality SLAs.

Frequently Asked Questions

What conference platforms does Line Quality Monitoring support?
Line Quality Monitoring works with any conference room setup intended for more than one participant — including Zoom, Microsoft Teams, WebEx, Cisco, traditional PSTN audio bridges, and any other dial-in conference service.
How does the dual-line methodology work?
PNM dials into your conference bridge with two separate phone lines simultaneously. The first line plays a reference audio recording into the conference. The second line listens and records what is received. PNM then compares the two to measure quality.
What audio quality metrics does PNM measure?
PNM measures six quality dimensions: audio clarity/intelligibility, latency/delay, distortion and audio artifacts, packet loss and dropouts, background noise levels, and volume/dynamic range.
Can I set quality thresholds for alerts?
Yes. You can configure minimum acceptable thresholds for each quality metric. When any metric drops below its threshold, an immediate alert is sent to your configured recipients.
How often can I schedule quality tests?
Quality tests can be scheduled at any frequency — from multiple times per day to weekly. You can also trigger on-demand tests before important meetings.
Does this work for international conference bridges?
Yes. PNM can test conference bridges with international dial-in numbers. Contact us for details on geographic coverage for your specific conference bridge locations.

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