SureTel
Business Fibre SLA Guide
Understanding Business Fibre SLAs
What business fibre SLAs actually cover — and what to ask before you sign.
- • Licensed South African ISP
- • Operating since 2010
- • Multi-provider fibre scope
- • Backup connectivity & UPS planning
Educational resource · Not a SureTel SLA · Terms depend on provider, product and contract.
Answer first
Business fibre SLAs, in one paragraph
A business fibre SLA is a written agreement that describes how the connection is expected to perform — an availability target, response and restore times, exclusions and service credits when qualifying downtime occurs. It is not a promise of 100% uptime, and terms vary between providers, fibre products and contracts. For a coverage and product check, see SureTel Business Fibre.
- An SLA sets a target and rules, not a guarantee.
- Measurement rules, exclusions and reporting decide the real behaviour.
- Customer-side kit and power usually sit outside the line SLA.
- Service credits depend on qualifying downtime and reporting windows.
- Continuity comes from the line plus backup, UPS and escalation.
Problems SLA language solves
Where fibre buyers get caught out
Most disagreements about fibre performance come from unclear expectations — not the line itself. Clear SLA language reduces surprises when things go wrong.
- “Best-effort” language
- Some fibre products are sold without any availability target, response time or credit rule at all.
- Uptime numbers without context
- A percentage on a brochure means little without measurement rules, exclusions and reporting windows.
- Confusing exclusions
- Force majeure, upstream FNO issues and customer-side kit are often excluded — but not always spelled out.
- Slow fault reporting paths
- Response and restore expectations only work if the customer can log a fault the right way at the right time.
- Service credits that never trigger
- Credits often depend on qualifying downtime rules, reporting windows and cumulative thresholds.
- No plan for the line being down
- An SLA on the primary line is not a continuity plan on its own — backup connectivity and UPS matter.
What an SLA normally covers
The building blocks of a business fibre SLA
An SLA is a bundle of definitions. Read each one against how your business actually uses the connection.
Availability target
The stated availability the provider aims for over a defined measurement period (for example a calendar month). Expressed as a percentage such as 99.5% or 99.9%. It is a target, not a promise, and depends on measurement rules and exclusions.
Measurement period and window
How the provider measures availability — usually a calendar month, sometimes a rolling window. Planned maintenance windows are often excluded from the calculation.
Response and restore times
How quickly the provider aims to acknowledge a fault and how quickly they aim to restore service, often varying by fault severity and business hours vs after-hours.
Fault reporting rules
How the customer logs a fault (channel, reference, contact details) and what information is needed to start the clock — an unreported fault often does not count.
Exclusions
What does not count as downtime — planned maintenance, force majeure, upstream FNO issues outside the provider's control, and customer-side equipment or configuration.
Service credits
Credits or refunds that may apply when qualifying downtime exceeds a threshold. Credits are usually capped and depend on the customer reporting the fault correctly and within a set window.
Support level
The support hours covered — standard business hours vs extended or 24/7 SLA support. 24/7 applies only where a qualifying SLA is in place.
Escalation path
How the customer escalates a fault if response or restore times slip, and who to contact at each level. A clear escalation path matters more than a headline uptime number.
Generic uptime maths
What common availability figures translate to in real time
Key caveat — read before the table
This guide explains business fibre SLAs in general terms. It is not a SureTel SLA and SureTel does not state or guarantee any uptime percentage. Actual terms, uptime targets, exclusions and service credits depend on the specific provider, fibre product, package, feasibility and contract.
The figures below are generic maths — a mechanical conversion of a percentage into approximate downtime over a month and a year. They are not commitments and not tied to any specific provider or product.
| Availability target | Approx. downtime per month | Approx. downtime per year | Example figure — context |
|---|---|---|---|
| 99.0% | ≈ 7 h 18 m | ≈ 3 d 15 h | Common on entry-level or best-effort products. |
| 99.5% | ≈ 3 h 39 m | ≈ 1 d 19 h | Typical target for standard business fibre. |
| 99.9% | ≈ 43 min | ≈ 8 h 45 m | Often marketed as “three nines” on higher-SLA products. |
| 99.95% | ≈ 21 min | ≈ 4 h 22 m | Premium fibre or dedicated products, terms vary. |
| 99.99% | ≈ 4 min | ≈ 52 min | “Four nines” — rarely a standard business-fibre SLA. |
99.0%
Per month: ≈ 7 h 18 m
Per year: ≈ 3 d 15 h
Example figure: Common on entry-level or best-effort products.
99.5%
Per month: ≈ 3 h 39 m
Per year: ≈ 1 d 19 h
Example figure: Typical target for standard business fibre.
99.9%
Per month: ≈ 43 min
Per year: ≈ 8 h 45 m
Example figure: Often marketed as “three nines” on higher-SLA products.
99.95%
Per month: ≈ 21 min
Per year: ≈ 4 h 22 m
Example figure: Premium fibre or dedicated products, terms vary.
99.99%
Per month: ≈ 4 min
Per year: ≈ 52 min
Example figure: “Four nines” — rarely a standard business-fibre SLA.
These figures are generic uptime calculations only. Actual SLA terms depend on the specific product, provider, package, contract, measurement method, exclusions and service-credit rules. Row labels are availability targets and example figures — they are not SureTel guarantees.
Best-effort vs business vs higher-SLA
Three tiers, three risk profiles
Best-effort fibre is not “bad” — it can suit lower-risk, cost-sensitive sites where the risk profile matches. The choice is about matching the SLA tier to how critical the connection is.
Best-effort / FTTH
Lower-risk, cost-sensitive sites where the risk profile matches — small teams, backup-of-a-backup, single-office.
- Usually no formal availability target.
- Support during standard hours only.
- Best fit when connectivity is not mission-critical.
- Often the most affordable option.
Business fibre with SLA
Businesses that need a stated target, clear fault-reporting and defined response times.
- Availability target and measurement rules.
- Response and restore expectations.
- Fault-reporting and escalation paths defined.
- Service credits under qualifying downtime rules.
Higher-SLA / dedicated
Sites where connectivity is critical — call centres, retail chains, factories, medical or financial operations.
- Tighter response and restore targets.
- Higher availability targets on premium products.
- Sometimes 24/7 SLA support under qualifying agreements.
- Usually paired with backup connectivity and UPS.
What affects whether an SLA applies
The exclusions and dependencies to read carefully
A fibre SLA covers what the provider controls, within the scope of the supplied solution. Everything else — upstream FNO issues, customer-side kit, power and how faults are reported — sits under different rules.
- Planned maintenance windows notified in advance are usually excluded from downtime.
- Force majeure events — theft, vandalism, weather, civil unrest — are commonly excluded.
- Upstream FNO or last-mile faults outside the provider’s direct control may be treated differently.
- Customer-side kit — router, firewall, switches, Wi-Fi, cabling and CPE — usually sits outside the line SLA.
- Power failure and UPS/battery issues on the customer premises are customer-side.
- Faults must be logged through the correct channel with a reference to start the clock.
- Service credits usually depend on qualifying downtime rules, reporting windows and cumulative thresholds.
- Support responsibility is within the scope of the supplied solution — not every third-party issue.
Support and escalation apply within the scope of the supplied solution. Unrelated third-party faults or customer-side issues outside scope are handled separately.
Backup connectivity & continuity
An SLA is not continuity by itself
Availability comes from a combination — the line SLA is one component of continuity, not the whole plan. Backup connectivity, UPS and a clear escalation path do most of the work when the primary line drops.
LTE/5G backup with dual-WAN routing
A cellular backup path that fails over when the primary fibre line drops. Coverage, signal strength and package need to be checked per site.
Alternative fixed line where feasible
A second physical connection from a different FNO or product where the site supports it. Feasibility, cost and lead times vary.
Licensed Microwave or Wireless Internet
A separate wireless path can be used as primary or backup on suitable sites — subject to line-of-sight and feasibility review.
UPS and backup power
Even a working line goes down when the router loses power. A UPS on the router, firewall and switches is a basic continuity building block.
Continuity flow: SLA is one component, not the whole plan
Fibre product
The underlying line — capacity, provider and product type set the baseline.
SLA terms
Sets service expectations — does not prevent all downtime.
Router / firewall
Customer-side kit, outside the line SLA.
Backup path
LTE/5G or an alternative connection, where feasible for the site.
UPS / power
Required for continuity when mains power drops.
Support & escalation
Within supplied solution scope, not every third-party issue.
Availability comes from the combination — the line SLA is one component, not the whole continuity plan.
For backup planning see backup internet for business and LTE/5G backup. For the wider continuity picture, see business continuity.
Questions to ask before signing
Ten questions that separate marketing from an SLA
Ask these before signing a fibre contract. If a provider will not answer them in writing, that is useful information on its own.
- What is the stated availability target and how is it measured?
- What is the measurement period, and are planned maintenance windows excluded?
- What are the response and restore targets, and do they change after hours?
- How must faults be logged for the clock to start, and what reference is returned?
- What events are excluded — force majeure, upstream FNO, customer-side kit?
- How do service credits work, and what thresholds must qualifying downtime cross?
- Is support standard hours or 24/7, and does 24/7 require a qualifying SLA?
- What is the escalation path if response or restore targets slip?
- Is backup connectivity in scope, and what is the failover method?
- Does the quote assume a UPS on the router and firewall, or is that separate?
What a business fibre SLA actually is
A contract mechanism, not a magic uptime button
A business fibre SLA is a contract mechanism. It sets out what the provider is committing to try to deliver, how performance is measured, when things do not count against them, and what happens when qualifying downtime occurs. The important word is “mechanism” — the SLA describes rules of engagement, not a physical property of the fibre.
Behind the SLA sits a physical service: a fibre pair from a fibre network operator, a router or ONT at the site, sometimes a firewall or switch, power to keep it all on, and a support team to respond when something breaks. The SLA describes how these pieces relate to each other when a fault happens. It does not add capacity, prevent a cable being cut, or restore the site when the power is out.
This is why availability at a site is best thought of as a system — the fibre product, the SLA, the customer-side equipment, backup connectivity, UPS and the escalation path. The SLA is one component of that system. A strong SLA on a single line does not remove the need for backup, and a well-designed backup path does not remove the need for a properly reported fault under the primary SLA.
A useful SLA does three things well: it names what “availability” means (measurement, exclusions, reporting), it commits to response and restore behaviour when a fault is reported, and it defines a service-credit mechanism that is actually reachable in practice. Everything else on the page is context.
Why SureTel
Honest SLA scoping, continuity planning included
- Operating since 2010
- Licensed South African ISP
- ICASA licence 0009/CECS/AUG/09
- Multi-provider connectivity scope
- Continuity planning with backup connectivity
Honest SLA framing
SureTel explains what a fibre SLA actually covers before you sign, and does not present headline uptime numbers as promises.
Continuity, not just a line
SureTel scopes backup connectivity, UPS and escalation alongside the line — the SLA is one component, not the whole plan.
Multi-provider view
SureTel works across providers and fibre products so the recommendation fits the site rather than a single supplier's shelf.
Within-scope support
SureTel supports what SureTel supplies. Unrelated third-party issues or customer-side kit outside scope are called out, not glossed over.
Licensed South African ISP · ICASA licence 0009/CECS/AUG/09 · Standard support Monday–Friday, 08:00–17:00. 24/7 support applies only to customers with a qualifying SLA. Support responsibility is within the scope of the supplied solution.
For commercial scoping of a specific site, request a quote or contact SureTel.
How SureTel scopes fibre + SLA
A seven-step scoping path
Share the site and requirement
Address, business type, users and how critical the connection is to daily operations.
Coverage and feasibility review
Check which fibre products are feasible at the site, plus wireless or microwave alternatives where relevant.
SLA and product options
Compare best-effort, business-SLA and higher-SLA options against the site’s risk profile and budget.
Backup and continuity scoping
Scope LTE/5G backup, dual-WAN routing, UPS and escalation paths alongside the primary line.
Written quote with terms
Availability target, response and restore expectations, exclusions and service-credit rules on paper.
Install, activate and test
Coordinate installation with the FNO or wireless provider, then commission and test the connection.
Support within supplied scope
Standard hours Monday to Friday 08:00–17:00, or a qualifying 24/7 SLA where in place. Escalation is documented.
Related resources
Keep planning the connectivity stack
Practical next reads for teams comparing fibre products, planning backup and understanding how the line affects voice.
- Business Fibre vs LTE
Where fibre fits as the primary fixed line and where LTE fits as a backup or interim option.
- Backup internet for business
How LTE/5G backup, dual-WAN routing and failover keep a business online when the primary line drops.
- Wireless vs Fibre Internet for Business
Compare fibre, fixed wireless and Licensed Microwave for a South African business address.
- What Is Microwave Internet?
How licensed microwave internet works and when a feasibility check may suit your site.
- VoIP Bandwidth & Internet Requirements
How much bandwidth business VoIP really needs — and where the SLA on the line matters for voice quality.
For a service-level view see Business Fibre, Business Connectivity, Wireless Internet and Licensed Microwave. Voice services that ride on the line live at VoIP and Cloud PBX.
Business fibre SLA FAQs
Frequently asked questions
What is a business fibre SLA?
A business fibre SLA is a written service level agreement between the provider and the customer that describes how the fibre connection is expected to perform. It typically covers an availability target, response and restore times, exclusions and service credits when qualifying downtime occurs. The specific terms depend on the provider, fibre product, package and contract.
Does an SLA guarantee 100% uptime?
No. No fibre SLA guarantees 100% uptime. SLAs describe an availability target, common exclusions, response and restore expectations and how service credits may apply. Actual availability depends on the fibre product, upstream FNO, customer-side equipment, power, backup connectivity and how faults are reported.
What is the difference between best-effort and SLA-backed fibre?
Best-effort fibre — including many FTTH products — is often sold without a formal availability target, response time or service credit rule. SLA-backed business fibre includes a stated target, defined fault-reporting and response times, and a service-credit mechanism. Best-effort may still suit lower-risk, cost-sensitive sites where the risk profile matches.
Is 99.9% uptime the same across all providers?
No. A 99.9% figure only means something in context — the measurement window, what counts as downtime, how planned maintenance is treated, how faults must be reported and how service credits are calculated. Two products advertising the same percentage can behave very differently in practice.
What is usually excluded from a fibre SLA?
Common exclusions include planned maintenance, force majeure events, upstream FNO faults outside the provider’s direct control, customer-side equipment such as routers, firewalls, switches, Wi-Fi and cabling, and customer-premises power issues. Faults must usually be logged through the correct channel for the clock to start.
Does the SLA cover my router, firewall or Wi-Fi?
Usually not. The line SLA typically covers the fibre service up to a defined demarcation point. Customer-side kit — router, firewall, switches, Wi-Fi and cabling — is normally outside the line SLA and is handled through separate hardware or managed-service arrangements.
Who supports what if there is a fault?
The provider supports what the provider supplies, within the scope of the agreed solution. Upstream FNO issues, force majeure and customer-side kit outside the line are handled under separate rules. Escalation paths and reporting requirements should be defined in the SLA so it is clear who owns each layer.
Do I still need backup connectivity if I have an SLA?
For business-critical sites, usually yes. An SLA on the primary line is one component of continuity, not the whole plan. Backup connectivity — LTE/5G, an alternative fixed line or wireless path — plus a UPS on the router and firewall keeps operations running when the primary line goes down, regardless of the SLA target.
Next step
Check what fibre and SLA options are feasible at your site
Tell SureTel your business address and how critical connectivity is. We’ll review coverage, compare fibre products and SLA tiers, and scope backup connectivity where relevant. For the wider commercial view, see Business Fibre or Business Connectivity.
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