Fibre • Business packages

How to choose the best business fibre package

The headline speed is the least useful number on the quote. Here is how to size a fibre package to how your team actually works – upload, contention, SLA and failover included – so you pay for reliability, not marketing.

UploadThe spec that separates business fibre from home fibre
1:1 vs 1:20Contention ratio decides peak-hour consistency
Written SLAUptime and repair time, in writing, per quote
48h–weeksOn-net vs off-net install lead time
The short answer

How do I choose the best fibre package for my business?

Match the package to how you work, not to the headline speed. Size the bandwidth to your team and apps, insist on symmetric upload if you run VoIP or cloud backups, choose dedicated (uncontended, SLA-backed) fibre where uptime is business-critical, and confirm the install lead time and failover options before you sign.

→
Still choosing a provider? This guide sizes the package. For the wider picture, start with our guide to business fibre in South Africa, see the best ISPs in South Africa, or compare business fibre prices side by side.
0
Sweet spot for most 10–30 seat offices
0
Yearly uptime floor in MetroFibre’s basic business SLA – check yours
0
Bandwidth per concurrent VoIP call (G.711)
0
Fastest realistic on-net activation
A South African business office at dusk with staff working at connected desks
The best package is the one that matches your workload. A 10-person office and a 40-seat contact centre can sit on the same street and need very different fibre.

Start with how your business actually uses the line

Before you compare a single quote, get a clear picture of your demand. The right package falls out of the answers, not out of the price list.

Five questions do most of the work. Answer them honestly and you will already know roughly what tier and type of fibre you need.

  • How many people are on the connection at once? Concurrent users, not headcount, drive the number.
  • What are the heavy apps? VoIP, video meetings, cloud storage, ERP and hosted desktops each pull differently, and most pull hardest on upload.
  • When are the peaks? A connection that copes at 09:00 can crawl at the 14:00 backup-and-video crunch.
  • How much do you send, not just receive? Cloud backups, file delivery and hosting live on upload capacity.
  • Who works remotely? VPN and remote-desktop users lean on upload and on a stable, low-latency line.
✓
Bottom line: a design studio uploading large files all day and a five-person accounting firm on email and web apps can be on the same street and still need different packages. Fit beats speed.

Symmetric vs asymmetric: upload is the business tell

Consumer fibre is built for downloading. Business fibre is built to send as fast as it receives, and that is what your voice, video and backups need.

Many entry-level packages advertise a big download number and quietly throttle the upload. That is fine for browsing and streaming. It falls apart the moment a team runs VoIP, hosts video calls, or pushes nightly backups to the cloud, because those workloads all depend on getting data out. Symmetric fibre gives you equal upload and download, so performance stays consistent in both directions.

TermWhat it meansWhy it matters for business
Download speedHow fast you receive data from the internet.Loading sites, email, pulling down files and updates.
Upload speedHow fast you send data to the internet.Video calls, cloud backups, file delivery and VoIP quality.
Symmetric fibreEqual upload and download.Consistent two-way performance for VoIP, UC and remote teams.
Asymmetric fibreHigh download, limited upload.Cheaper, fine for browse-heavy use, weak for two-way workloads.

A useful rule of thumb: budget roughly 100 kbps of upload per concurrent VoIP call (codec G.711 plus overhead), then add headroom for video and backups. Ten simultaneous calls is only about 1 Mbps of voice, but stack video meetings and a cloud backup on top and a throttled 10 Mbps upload disappears fast.

Dedicated vs contended: the real divide in business fibre

Two packages can advertise the same speed and deliver wildly different experiences. Contention ratio is why.

Contention is how many customers share the same underlying capacity. A lower ratio means fewer people competing for bandwidth, so your speed holds up when everyone is online. Residential fibre is often contended at 1:20 or worse. Business broadband typically improves that to around 1:8. Dedicated (uncontended) fibre gives you a 1:1 ratio: the speed you buy is the speed you get, guaranteed, at any hour.

Why two “100 Mbps” lines behave differently

DEDICATED (1:1, uncontended)Your officeFull speed, any hourSLA-backed, guaranteedCONTENDED (shared, e.g. 1:20)Your office+ many othersSlows at peakBest-effort, no guarantee

That difference maps onto three broad package types. Most businesses live in the middle tier and only step up to dedicated when downtime genuinely costs money.

Best-effort broadband

1:20 shared
  • UploadOften throttled
  • SLANone
  • Best forMicro / startup
Most businesses

Business broadband

~1:8 contended
  • UploadUsually symmetric
  • SLABasic – check the %
  • Best forSMEs, 5–40 seats

Dedicated (DIA)

1:1 uncontended
  • UploadSymmetric, guaranteed
  • SLACredit-backed, up to 99.99%
  • Best forUptime-critical ops
!
Watch the price gap: Vox Telecom publishes Business Fibre from R649 a month excl. VAT, SLA-backed Premium Business Fibre from R1,049 and Dedicated (uncontended) fibre from R2,349, and WIRUlink’s business fibre runs from R795 up to R41,599 a month excl. VAT for 1000/1000 Mbps (as published on the Vox and WIRUlink business fibre pages, sampled August–September 2026). Always confirm current rates and terms with the provider. For a full breakdown of once-off and hidden install costs, see our business fibre installation cost guide.

Match the package to your business profile

The fastest way to shortlist is to find the row that looks like you, then treat it as a starting point to refine against real usage.

Business profileSensible speedPackage typeNon-negotiables
Micro / startup (1–4 people, email & web)20–50 MbpsBusiness broadbandUncapped; symmetric if you run VoIP
Small office (5–15, cloud apps + VoIP)50–100 MbpsBusiness broadband, symmetricWritten SLA; static IP; QoS for voice
Growing team (15–40, HD video, remote staff)100–300 MbpsBusiness broadband or entry DIALow contention; failover; upgrade path
Contact centre / heavy VoIP200–500 MbpsDedicated (DIA)1:1 uncontended; credit-backed SLA; short MTTR
Uptime-critical (finance, e-commerce, multi-site)500 Mbps–1 Gbps+Dedicated + second lineDiverse last-mile; SD-WAN failover

These are starting points, not rules. A 12-person firm that lives in video meetings may need more than a 25-person firm that mostly emails. Size to concurrent load and the heaviest app, then leave headroom for growth and the peak-hour crunch.

Not sure whether you even need a business-class line rather than a home package? Our guide on business fibre versus home fibre covers that decision in full.

Buy the package that keeps you working at 14:00 on a Tuesday, not the one with the biggest number on the brochure.

WhichVoIP editorial view

SLAs, failover and the fine print that actually protects you

A business package is a promise about what happens when things go wrong. Read that promise before you sign, because a fast line with no recovery guarantee is a consumer product wearing a suit.

Get the SLA in writing

A genuine business-grade service level agreement should spell out the uptime guarantee, the maximum or mean time to repair, fault-resolution timelines and the escalation path when a fix runs late. Published terms vary more than most buyers expect: MetroFibre’s basic business SLA commits to a minimum of 95% uptime a year and a maximum repair time of 24 business hours, while Innovo Networks quotes 99.00% to 99.99% availability depending on the service. If a provider will not put an SLA on paper, you are almost certainly looking at a best-effort service regardless of what the sales page says.

Plan for the line going down

Even the best fibre fails sometimes, so build in continuity rather than hoping. A UPS or inverter keeps your router and phones alive through a power interruption, and a secondary connection keeps you online through a cable fault.

  • Diverse last-mile: a second line on a different physical route so one fault does not take you fully offline.
  • LTE or 5G failover: an automatic mobile backup that carries you until fibre returns.
  • SD-WAN aggregation: intelligently combines and load-balances multiple links, and fails over seamlessly.

Check the value-adds and the contract

Many business packages bundle a managed router, firewall, static IP, traffic prioritisation for voice, and VoIP or unified-comms integration. These can remove separate line items from your budget. On the contract itself, confirm the term (commonly 12, 24 or 36 months), whether you can upgrade or downgrade without penalty, and what happens if you move premises.

A neat business network rack with a router, firewall and fibre termination
Value-adds like a managed router, firewall and failover often matter more to daily reliability than an extra 100 Mbps of headline speed.

A five-step framework for the final decision

Once you have shortlisted a tier and type, run every quote through the same five checks so you are comparing like with like.

Size to concurrent load, then add headroomBase the speed on peak simultaneous users and the heaviest app, plus headroom for growth. Do not pay for capacity you will never touch.
Confirm the upload is symmetricIf you run VoIP, video or cloud backups, equal upload is non-negotiable. Ask for the guaranteed upload figure, not the advertised download.
Ask for the contention ratioLower is better. Uncontended 1:1 for uptime-critical work; around 1:8 is a reasonable business-broadband floor.
Read the SLA and failover termsUptime percentage, MTTR, escalation path, and how you stay online during a fault. No written SLA means best-effort.
Check the lead time and the contractOn-net can activate in 48 hours; off-net can take weeks. Confirm term length, upgrade penalties and premises-move terms before signing.
✓
Bottom line: the best business fibre package is rarely the cheapest or the fastest. It is the one whose upload, contention and SLA match how your team works, with a failover plan for the day the line drops.

Our verdict

Choosing well is about fit, not headline speed. Size the line to your concurrent load and heaviest app, insist on symmetric upload the moment voice or backups enter the picture, and let contention and the SLA decide between business broadband and a dedicated line. Most SMEs are well served by symmetric business broadband in the 50–300 Mbps band; step up to dedicated, uncontended fibre only where downtime has a real rand cost. Whatever you buy, get the SLA in writing and put a failover behind it.

Our recommendation: shortlist two or three providers on your chosen tier and type, then compare quotes on guaranteed upload, contention ratio and SLA terms rather than on price alone.

Compare business fibre quotes side by side

Tell us your team size and how you work, and we will help you weigh business fibre packages on the specs that actually matter.

Get business fibre quotes Browse fibre providers

Frequently asked questions

What speed fibre does a small business need?
For a 5 to 15 person office running cloud apps and VoIP, 50 to 100 Mbps symmetric is usually the sweet spot. Micro teams on mostly email and web can start at 20 to 50 Mbps, while a growing team with heavy video and remote staff should look at 100 to 300 Mbps. Size to peak concurrent users and your heaviest app, then add headroom for growth.
What is the difference between business fibre and home fibre?
Business fibre typically offers symmetric upload, a lower contention ratio, a written SLA with uptime and repair guarantees, priority support and often a static IP. Home fibre is best-effort, usually asymmetric and carries no service guarantee. The gap shows up most under load and during faults. See our dedicated business-versus-home fibre guide for the full comparison.
Do I need symmetric fibre for VoIP?
For anything beyond a couple of lines, yes. Voice, video and cloud backups all depend on upload, and consumer packages often throttle it. Budget roughly 100 kbps per concurrent call on codec G.711 plus overhead, add video and backups on top, and you will quickly see why a throttled upload becomes the bottleneck.
What is a contention ratio and why does it matter?
Contention ratio is how many customers share the same underlying capacity. Residential fibre is often 1:20 or higher, business broadband commonly around 1:8, and dedicated fibre is 1:1 (uncontended). A lower ratio means your speed holds up at peak times instead of slowing when everyone is online.
What uptime should a business fibre SLA guarantee?
It varies by provider, so read the number. Published South African business SLAs we have sampled run from a 95% yearly minimum with a 24-business-hour maximum repair time (MetroFibre’s basic business SLA) to 99.00% to 99.99% availability on service-dependent connectivity SLAs (Innovo Networks). Look for a defined repair time, fault-resolution timelines and an escalation path. Insist on seeing it in writing. If a provider will not commit to an SLA, treat the service as best-effort no matter how it is marketed.
How long does business fibre take to install?
If fibre is already in your building or precinct (on-net), activation can take as little as 48 hours to a few business days. If a new build or trenching is needed (off-net), expect several weeks to a couple of months. Always confirm on-net status and the lead time before signing, and see our fibre installation cost guide for the once-off pricing.
Is the most expensive fibre package always the best?
No. Overbuying speed you never use is as wasteful as underbuying reliability. The best package matches your upload needs, contention tolerance and uptime requirements. Many businesses are better served by a well-specified symmetric business-broadband line with a solid SLA and failover than by a bigger headline speed with no guarantees.

Keep reading

Business fibre vs home fibre: what changes Business fibre installation costs explained Fibre vs fixed wireless for business Uncapped vs unshaped fibre for VoIP

Sources: ITU-T G.711 (voice codec bandwidth) and ITU-T G.114 (one-way latency <150 ms) for VoIP planning figures; speed and contention figures are general planning ranges; prices and SLA terms are as published by Vox Telecom, WIRUlink, MetroFibre and Innovo Networks, sampled August–September 2026 – confirm current terms directly with the provider.

Now hiring Hire your AI receptionist