Real ping, jitter, and speed test — scored with the same ITU-T formula telecom engineers use to predict call quality. Takes about 5 seconds, no signup.
This checks latency, jitter, and throughput to 6X's own servers. It doesn't measure packet loss, which only shows up on a real active call — if a call still sounds choppy despite a good result here, that's likely the loss this pre-call check can't see yet.
5 real pings, the jitter between them, and a timed download/upload — all against 6X's own servers.
Your numbers go through the ITU-T E-model, the published standard for predicting voice call clarity.
Excellent, Good, Fair, or Poor — with the real numbers behind it, not a vague spinner.
Test your real connection before committing to a business phone line — know what to expect instead of taking it on faith.
Calls sounding rough? Check whether it's your connection before opening a support ticket — get an answer in seconds.
Run it on WiFi, then on a wired connection, and compare — a common, easy fix for a Poor or Fair result.
Actual timed ping, jitter, and throughput — not a guess, not simulated.
Scored with the ITU-T E-model, the same standard real telecom engineers use to predict call quality.
Genuinely free — no account, no app, no real call ever placed.
This is the exact same test built into the 6X Softphone's own Network Test tab, just without needing to log in first.
It measures three real, timed values against 6X's own servers: ping (round-trip latency), jitter (how much that latency varies), and download/upload throughput. These are fed into the ITU-T E-model, the same published formula telecom engineers use to predict voice call quality.
Yes, completely free, no login, no account, and it never places a real phone call — it only measures your connection.
Not before a call starts — packet loss only shows up on a real active call's audio stream. If you're logged into the 6X Softphone, a live version of this same indicator runs on the call bar during an actual call and can see packet loss directly.
They are quality tiers derived from your measured ping and jitter against the ITU-T E-model. Excellent and Good mean your connection should handle business VoIP calls cleanly. Fair means calls will likely work but may occasionally sound rough under load. Poor means expect audible problems, often fixed by switching from WiFi to a wired connection.
If your result looks good, wholesale voice and SMS from 6X run on the same infrastructure this test just measured against.
Confirming who's on the other end of a call? Check the number's real carrier and country first.
Carrier Lookup →This tested your own line — what about your vendor's route? 6X Route Inspector independently audits FAS, CLI, and audio quality on any route you're buying, even without a destination number.
See Route Inspector →