Fibre repairs in South Africa typically take 24–72 hours, depending on whether the issue is an isolated line fault, area outage, or major fibre break. Red LOS with confirmed access-layer fault usually requires FNO technician dispatch within this window.
What the Problem Means
If your fibre is offline due to:
- Persistent red LOS
- PON failure after restart
- Confirmed area outage
Then the issue is at the access layer, and repair timelines depend on:
- Fault location
- FNO workload
- Severity of infrastructure damage
Repair duration is not determined by the ISP alone. Physical infrastructure is maintained by the FNO.
Typical Fibre Repair Timeframes
| Fault Type | Description | Typical Repair Window |
|---|---|---|
| Isolated drop-line fault | Single home fibre break | 24–48 hours |
| Cabinet-level issue | Multiple homes affected | 24–72 hours |
| Area-wide outage | Cabinet power or distribution issue | 24–72 hours |
| Major fibre trunk break | Construction damage | 48–96+ hours |
| ONT hardware fault | Device replacement | 24–48 hours |
These are typical ranges, not guaranteed SLAs.
What Affects Repair Speed
1. Fault Location
- Inside property boundary → faster resolution
- Street-level fibre break → technician required
- Underground trunk damage → longer restoration
2. Area Outage vs Single Fault
If multiple homes are affected:
- Priority increases
- Diagnosis may be faster
- Dispatch coordination required
3. Technician Availability
In dense urban areas (JHB, CPT, DBN):
- Higher demand during peak fault periods
- Loadshedding can increase incident volume
4. Access Constraints
Delays may occur if:
- Complex requires access coordination
- Locked cabinets
- Roadwork permits required
Step-by-Step Repair Lifecycle
User Completes Internal Diagnostics
- Power, patch lead, and wired test confirmed.
ISP Verifies ONT Light Status
- Confirms red LOS or PON failure remotely.
Ticket Escalated to FNO
- ISP submits formal fault request to the FNO.
FNO Remote Signal Check Performed
- FNO checks OLT-side signal before dispatching.
Technician Dispatched If Required
- On-site visit scheduled based on fault type.
Fibre Repaired or Re-Spliced
- Physical line restored at the point of fault.
ONT Re-Registers (PON Solid)
- Signal returns and ONT syncs with the network.
Service Confirmation
- User confirms connectivity restored.
This structured lifecycle prevents premature assumptions.
Definition: Access-Layer Repair
Restoration of the physical fibre connection between your property and the local distribution cabinet. It may involve re-splicing fibre, replacing connectors, or restoring cabinet power.
ISPs cannot perform these repairs directly.
South African Context
In South Africa:
- Most residential fibre is GPON-based
- Infrastructure is shared at cabinet level
- Loadshedding can increase repair queues
Urban centres often see faster dispatch compared to remote areas.
When to Follow Up
Follow up if:
- No technician dispatched after 48 hours
- No status update received
- Repair window exceeded 72 hours without explanation
Escalation beyond this point depends on FNO response timelines.
When This Is NOT the Issue
If all of the following are true:
- PON is solid
- LOS is off
- Internet is slow but online
Then repair timelines are not relevant — the issue is performance-related.
See our fibre speed & performance guides