Run a free 60-second diagnostic from your browser. No installation needed.
Tests run entirely in your browser. No software to install.
The FCT Full Network Diagnostic is a comprehensive, browser-based network audit for business internet connections. It goes beyond basic speed tests to measure bufferbloat, jitter, packet loss, traceroute, and VoIP MOS scoring — the metrics that actually determine whether your internet is reliable enough for real-time business applications.
Built by First Call Tech (FCT) — managed IT services for mid-sized businesses. No software to install. Your results stay private and are not shared with third parties.
Measures latency increase under load. The #1 cause of "internet feels slow when downloading." QoS/SQM can fix it.
Variation in packet arrival time. High jitter = choppy VoIP calls, glitchy video. Critical for real-time apps.
Percentage of data packets that never arrive. Even 1% loss degrades VoIP and video conferencing significantly.
Maps every hop between you and the internet. Identifies bottlenecks, bad routes, and ISP peering issues.
Mean Opinion Score (1–5) predicting call quality. Accounts for latency, jitter, and packet loss. 4.0+ = toll quality.
Download/upload throughput plus HTTP latency and DNS resolution — the same tests as the quick check, with deeper analysis.
Bufferbloat is excessive latency caused by oversized network buffers. When your connection is under load (e.g., downloading a large file), packets queue up in these buffers, causing latency spikes of hundreds of milliseconds. This makes VoIP calls break up, video conferences freeze, and web browsing feel sluggish — even on fast connections. The fix is typically QoS (Quality of Service) or SQM (Smart Queue Management) on your router.
MOS (Mean Opinion Score) runs from 1 (unusable) to 5 (perfect). Scores above 4.0 are considered toll-quality (landline equivalent). 3.5–4.0 is acceptable for business use. Below 3.5, callers will notice degradation. The FCT diagnostic calculates MOS based on your measured latency, jitter, and packet loss.
Consumer speed tests only measure throughput. The FCT diagnostic adds bufferbloat detection, jitter analysis, packet loss measurement, traceroute, and VoIP MOS scoring — metrics that matter for business reliability. It's a network health audit, not just a speed test.
Yes, it's safe. The test uses standard HTTP requests and brief data transfers — similar to loading a web page or watching a short video. It is designed not to saturate your connection or disrupt ongoing business activities.
Yes. First Call Tech provides managed IT services including network optimization, QoS configuration, firewall tuning, VoIP system setup, and ongoing monitoring. If your diagnostic shows issues, email us your results and we'll recommend a solution — free initial consultation.
This page runs the complete suite: bufferbloat, jitter, packet loss, traceroute, and VoIP MOS scoring. Click the button at the top to start. For questions or follow-up, contact FCT directly.
📧 tech@fct.pro — free consultation, no strings.