GlossaryNetwork

Packet loss

Packet loss is the share of packets that never reach their destination; on a voice or video call even a small amount causes dropped words, frozen video and a line that seems to cut out.

  • Network
  • Updated
  • Written by the Telxpress advisory team

01 In depth

What it is, why it matters and what to ask a vendor

Web pages and email hide packet loss by resending; real-time calls cannot wait, so a lost packet is a missing slice of sound. Loss comes from congested links that discard packets, faulty cabling and connectors, duplex mismatches, interference on Wi-Fi, and overloaded firewalls. Call endpoints report it through RTCP (RFC 3550), which is where provider dashboards get their per-call statistics.

For a growing business packet loss is the fault that is hardest to see and easiest to misattribute. A single damaged patch cord or a switch port negotiating badly can degrade every call that crosses it while every speed test looks fine. Cameras and backups sharing the same uplink add loss exactly when the office is busiest.

Ask your network partner to test the cabling and switch ports that carry phones and meeting rooms, to look at per-call statistics from the phone platform rather than one speed test, and to confirm QoS on the uplink. Ask your internet provider what loss their service guarantees and how they measure it.

03 At Telxpress

Where this shows up at Telxpress

The pages and articles where this term does real work: what we advise, build and support.

04 Sources

Public references

The standard or law this definition rests on, as published by its owner. Fetched and checked on the review date above.

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Last reviewed: . Published by Telxpress, Irvine, CA.