Articles
Welcome to Tellus Fiber's article library. Here we share knowledge and insights about fibre optics, WDM, DAC cables and modern networking technology. Our articles help you understand how the right fibre solutions create stable, efficient and future-proof networks — simply and without hassle.
PON vs Ethernet
Fibre is fibre, right? The light travels in the glass, the data goes back and forth, and everything feels fast. But behind the scenes, there are different ways to build the network itself – and it makes a big difference for both operation and economy.
QSFP-DD or OSFP for 400G
in data centres?
QSFP-DD and OSFP can both carry 400G, but
the choice is determined by switch platform, cooling and planned migration. Here are
the checkpoints that reduce the risk of incorrect purchases.
The difference between GPON & XGS-PON
PON is the foundation of many modern fibre networks – a cost-effective and reliable technology without active equipment between node and customer.
But which standard is the right choice today – GPON or XGS-PON?
CWDM DWDM
Learn the difference between CWDM and DWDM – from capacity and cost to installation, applications and the future's sustainable fibre networks.
From 100G to 400G
When does it make sense to upgrade from 100G to 400G? Compare capacity, optics, fibre, power and compatibility for data centres and operator networks.
100G QSFP28
Choose the right 100G QSFP28 solution based on range, fibre type and network environment – from DAC and AOC to SR4, DR, FR, LR4 and ER4.
BiDi Transceivers
BiDi enables transmission in both
directions over a single mode fibre. It can free up capacity quickly – but
only when wavelength pairs, power budget and equipment match.
Troubleshoot fibre link
Do not change components at random. A structured troubleshooting separates portfolios, optical issues and fibre faults – and reduces both downtime and unnecessary spare part replacements.
DAC, AOC or optical transceivers?
The cheapest link on the purchase order is not always the cheapest in operation. Compare DAC, AOC and modular fibre based on the entire lifecycle.
How to calculate optical power budget for a fibre link
The range on the datasheet does not tell the whole
story. With an optical power budget, you can see if fibre, connectors, splices and
operational margin fit before the link is installed.
Single mode or multi mode?
Single mode and multi mode suit different environments. The right choice is determined not only by distance, but also by optics, cable route, future capacity, number of connectors and total cost over time.
New chapter for Tellus Fiber!
We are pleased to share that Tellus Fiber is now part of the Waystream Group.
