Ethernet Permanent Link, Channel and Test Reports
Compare permanent-link and channel test boundaries, identify the correct tester adapters, and read wiremap, length and transmission fields in copper cabling reports.
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Compare test boundaries
A copper cabling report applies to a defined test boundary and selected limit. A permanent link normally covers the installed fixed cabling and its terminations; a channel includes the connecting cords within the tested path. Read the boundary before interpreting PASS.
| Boundary or field | Meaning | Check before accepting the report |
|---|---|---|
| Permanent link | Fixed installed cabling between the defined termination points. | Correct permanent-link adapters and inclusion of any consolidation point. |
| Channel | Installed link plus the connecting cords within the channel boundary. | The actual cords tested; replacing them changes the tested assembly. |
| Wiremap / length | Pair continuity/assignment and reported electrical lengths. | Cable ID, pair results and tester settings; pin continuity alone does not establish category performance. |
| Insertion loss / NEXT / return loss | Different transmission properties evaluated over the required frequencies. | Selected category/class, test limit, worst margin and full report. |
| Tester identification | Instrument, adapters, software and calibration information. | Traceability to the actual test and correct saved report. |
Read the report in order
- Match cable ID and endpoints to the installed link.
- Confirm permanent-link or channel mode, category/class and test-limit edition.
- Check tester/adapters, date, calibration reference and recorded cable settings.
- Review all required measurements and marginal or failed pairs/frequencies.
- Retain the complete result file and any retest history.
A channel pass with one cord set is not a permanent-link test. A basic wiremapper does not perform a full transmission certification test. No generic length limit is substituted here for the applicable cabling system and test standard.
Connect results to the installed cable
Record the boundary, exact test limit, report filename and discrepancy against the cable schedule. Use T568A/B pair assignments to identify the termination convention and PoE types and classes for power-related documentation. A transmission test result does not alone establish all PoE operating conditions.
The PoE budget calculator handles the separate task of comparing entered device demand with switch power ratings. Keep that budget with the link documentation; it does not replace cabling certification or prove power delivery at an endpoint.