My family has probably watched Lord of the Rings a dozen times or more1. We can (and sometimes will) quote entire passages from the films.
Latency is a term that’s frequently cited when discussing long-haul networks. But what is it really?
TeleGeography’s Submarine Cable Map recently hit a new milestone: depicting over 650 cable systems.
As of February 2025, that’s a whopping 570 in-service systems, with another 81 planned.
The number of cable systems we study is constantly increasing. This is due to massive investment in this infrastructure—both along major routes and to small islands—as well as our ongoing efforts to track global systems in more detail.
The number of in-service systems is greater now than in any other year within the last two decades.
Hello, gentle readers, and welcome to the 2025 State of the Network Report—our eighth edition.
The TeleGeography team spent the last year compiling market surveys, building algorithms, and analyzing emerging trends, and now we're ready to share the highlights.
We haven't been getting enough fiber here at TeleGeography Explains the Internet, but we're about to change that.
Nutritional jokes aside, this week, we welcome Todd Chapman, a veteran in fiber development, to the hot seat. Todd walks us through the ins and outs of Layer 0 of the physical infrastructure underlying data transmission. Some classic explaining of the internet.
In this episode, you'll get a walkthrough of the process that takes a fiber project from manufacturing to lit service—get ready to learn a thing or two about different types of fiber and their uses. We also get some good explanations of the dark fiber market and an overview of when enterprises might be interested in leasing dark fiber instead of lit service.
Here's a glimpse at what we discussed. Scroll to the bottom to listen to the whole discussion in its fiber-rich glory.
Last week, Research Director Alan Mauldin joined Ciena’s Brian Lavallée for a live webinar exploring the technical and strategic drivers transforming the AI landscape.
Ever wondered how much you really know about the world’s vast network of submarine cables?
Each month, cable enthusiasts put their knowledge to the test with the secret trivia game hosted on our interactive submarine cable map.
Today, we’re pulling back the curtain and revealing the latest winning answers! Whether you're a seasoned player or just curious about the fascinating web of global connectivity, this is your chance to see how well you stack up.
Ready to uncover the secrets? Let’s dive in!
Earlier this week, operators of two communications cables—C-Lion 1 and BCS East-West Interlink—reported faults in the Baltic Sea.
Local internet service seems largely unaffected, but a swirl of sabotage allegations have emerged in the global press.
Without making a ruling on any ongoing investigations, let’s look at the facts.
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