"Up to 1 Gbps" — what many operators advertise. What the ad leaves out: only 300 Mbps upload. On a residential line, that's fine. In a business, it's a trap.
What symmetric vs asymmetric means
Connection speed has two directions:
- Download — receiving data (streaming, downloads, web browsing).
- Upload — sending data (cloud backups, video calls, uploading files to the server).
Symmetric fibre has the same speed in both directions (e.g. 1 Gbps / 1 Gbps). Asymmetric has slower upload (e.g. 1 Gbps down / 300 Mbps up). Most Spanish residential FTTH is asymmetric 1G/300M or 1G/600M.
Why business needs symmetric
Business use cases are radically different from residential:
- Video calls: Teams/Zoom/Meet need stable upload. With 300 Mbps shared across 15 people, quality degrades fast.
- Cloud backups: a business with 2 TB of critical data needs hours for a daily backup. With 1 Gbps up: 4.5 h. With 300 Mbps: 15 h (and you block the line for everyone else).
- SaaS and cloud servers: when your ERP/CRM is in the cloud, every action sends data upward (forms, attachments, sync). Upload is the real bottleneck.
- VoIP and IP PBX: each simultaneous call consumes upload. 50 extensions = 10 Mbps minimum constantly.
- Self-hosted apps: if you run your own servers (GitLab, Jitsi, exposed NAS), you need strong upload.
The myth that "business doesn't need upload"
Some salespeople insist that "95% of traffic is download". That was true 10 years ago. Today, with SaaS, automatic backups, constant video calls and remote collaboration, upload is as critical as download. And in many companies (agencies, production houses, architects) upload is more critical.
A company on asymmetric 1G/300M will notice that Teams "freezes" when someone uploads a file, that backups don't finish overnight, that the CRM "feels slow" exactly when activity peaks. The bottleneck is always the upload.
Conclusion
Symmetry isn't a premium extra — it's the baseline for serious business connectivity. Olivet Telecom only offers 1 Gbps / 1 Gbps symmetric, certified to Y.1564, because anything else is self-deception.
Frequently asked questions
How do I know if my current fibre is symmetric?
Run speedtest.net. If download and upload are similar (± 10%), it's symmetric. If upload is ~30% of download, it's asymmetric 1G/300M.
Are there residential operators offering symmetric?
Some sell it as "Premium" with a surcharge. Still over residential Best Effort network, no guarantees. Not the same as business symmetric fibre with ORO and SLA.
Want this quality at your business?
1 Gbps symmetric fibre certified to Y.1564. €149/month. No lock-in.
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