Resolve Ethernet Jack with No Link at Wall Outlet

draft · network ethernetnetwork-cable

Generated by docuprocessor (prompt article/v3) · 2026-04-22 12:55

Source thread

thread_id: spaces/AAAA05BdS6s/threads/dyTvM8f1BN0 · 18 msgs · first 2024-11-18 · participants: Tech ATech B

Tech A 2024-11-18 16:56

Guys, Diamond District Dental... anyone that have been at this office? They are having an issue with an ethernet jack. They do not have link when they plug the cable. I asked them to check all the switches at the rack, all of them are on. There's no label at the ethernet jack at the wall to identify it at the patch panel. What can we do here? -.- They already tried with another cable, still the same This computer is located at the hallway,next to the mill machine

Tech A 2024-11-18 16:56

(no text)

image/png image.png

**Network/server rack cabinet** with multiple patch panels (top section showing dense white Cat cable runs), a **red-labeled device** (partially visible, appears to be a WatchGuard or similar security appliance), a **black network switch** mid-rack, and **mixed cabling** (white Cat cables, one yellow patch cable, one orange cable) in a partially organized but loosely managed configuration. **No visible error codes, numeric readouts, or on-screen messages.** Indicator lights are not clearly resolvable at this resolution. No visible physical damage observed; cable management appears functional but informal, with several cables looping freely rather than routed through cable managers.

Tech A 2024-11-18 17:11

@all 👀

Tech B 2024-11-18 17:14

What's issue, is there a Pc that cannot connect to the internet?

Tech A 2024-11-18 17:15

no network, no link when they plug in the ethernet cable

Tech A 2024-11-18 17:15

and they want to use that ethernet jack to connect a laptop there

Tech B 2024-11-18 17:15

so just the one PC is having issue when you use the cable?

Tech B 2024-11-18 17:16

If so, are they getting a 169 address when the cable is plugged in or does it say no network access?

Tech A 2024-11-18 17:16

Yes,the computer is not getting network when they connect it to that ethernet jack at the wall

Tech A 2024-11-18 17:17

network cable unplugged

Tech B 2024-11-18 17:17

You rebooted the switch

Tech A 2024-11-18 17:17

There are 5 switches, and looks like it's happening only there. I can ask them to reboot all the switches...

Tech B 2024-11-18 17:18

Yeah reboot, all switches if that does not work, we may need to go onsite to test the connection

Tech A 2024-11-18 17:48

Yeah still not working,probably is the jack or the wire that runs to the rack

Tech B 2024-11-18 17:59

Yeah most likely. I doubt it, but it could also be the port on the laptop. We could have the office confirm by plugging a known working ethernet cable into the laptop to verify the port on the laptop is ok.

Tech A 2024-11-18 18:01

Laptop is working properly if we connect it into another ethernet jack

Tech B 2024-11-18 18:02

Cool, then its an onsite issue for sure

Tech A 2024-11-18 18:03

I think the same, thanks Anthony :) I moved it to operations

---
title: "Resolve Ethernet Jack with No Link at Wall Outlet"
category: network
tags: ["ethernet", "network-cable"]
source_thread_id: "spaces/AAAA05BdS6s/threads/dyTvM8f1BN0"
source_space: "spaces/AAAA05BdS6s"
generated_at: "2026-04-22T12:55:37"
participants: ["Tech A", "Tech B"]
---

# Resolve Ethernet Jack with No Link at Wall Outlet

## Problem
An ethernet jack at the wall outlet shows "network cable unplugged" when devices are connected, preventing network access for a laptop in the hallway next to the mill machine. The office has multiple switches (5 total) in the rack, all powered on. The ethernet jack has no label to identify its corresponding port at the patch panel. A different ethernet cable was tested with the same result, and the laptop works properly when connected to other ethernet jacks in the office.

## Resolution
1. Reboot all network switches in the rack to eliminate any port configuration issues
2. If the problem persists after switch reboots, verify the laptop's ethernet port is functional by testing it with a known working ethernet jack elsewhere in the office
3. If the laptop works on other jacks but not the problematic wall outlet, schedule an onsite visit to test the physical connection between the wall jack and patch panel
4. During onsite troubleshooting, use a cable tester or toner to trace the cable run from the wall jack to identify the corresponding patch panel port
5. Test continuity and verify proper termination at both the wall jack and patch panel connections

The issue is confirmed to be with the physical ethernet infrastructure (wall jack or cable run to the rack) rather than the laptop or network switches.

## References
- Source discussion: `spaces/AAAA05BdS6s/threads/dyTvM8f1BN0`
- Attachments: - ![image.png](../attachments/dyTvM8f1BN0.BCKUGqrlIfE/image.png) — **Network/server rack cabinet** with multiple patch panels (top section showing dense white Cat cable runs), a **red-labeled device** (partially visible, appears to be a WatchGuard or similar security appliance), a **black network switch** mid-rack, and **mixed cabling** (white Cat cables, one yellow patch cable, one orange cable) in a partially organized but loosely managed configuration.

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