
Armored fiber optic cables are commonly used in outdoor fiber networks where additional mechanical protection is required.
Two common armored structures used in duct fiber cables are aluminum tape armor and steel tape armor. Understanding the differences between these structures helps engineers select the appropriate cable for different installation environments.
Why Armored Fiber Cables Are Used in Outdoor Networks
Armored fiber optic cables provide additional protection against external pressure, mechanical impact and environmental stress.
In underground duct installations, armored layers help protect optical fibers from crushing forces, moisture penetration and rodent damage.
- Mechanical protection
- Moisture resistance
- Improved cable durability
Aluminum Tape Armored Fiber Cable

Aluminum tape armored fiber cables use a corrugated aluminum tape layer applied around the cable core. This structure provides moderate mechanical protection while maintaining relatively low cable weight.
Typical Use Cases
- Underground duct installations
- Urban fiber networks
- Areas with moderate mechanical stress
Common Aluminum Tape Armored Cable
A common example of aluminum tape armored cable is the GYTA fiber optic cable structure used in duct network deployments.
Steel Tape Armored Fiber Cable

Steel tape armored fiber cables include a corrugated steel tape layer that provides stronger mechanical protection compared to aluminum tape structures.
Typical Use Cases
- Underground ducts with higher mechanical stress
- Industrial environments
- Areas with higher risk of rodent damage
Common Steel Tape Armored Cable
GYTS fiber optic cables are typical steel tape armored structures widely used in outdoor duct fiber deployments.
Comparing Steel Tape and Aluminum Tape Armor
- Steel tape armor provides stronger mechanical protection.
- Aluminum tape armor results in lighter cable weight.
- Steel tape cables are often used in more demanding environments.
- Aluminum tape cables are commonly used in standard duct installations.
How Engineers Choose Between Steel and Aluminum Armor

The choice between aluminum tape and steel tape armored cables depends on installation environment, mechanical stress levels and long-term network protection requirements.
For standard underground duct installations, aluminum tape armored cables are widely used. For installations with higher mechanical stress or rodent risks, steel tape armored cables may be preferred.
FAQ
What is aluminum tape armored fiber cable?
Aluminum tape armored fiber cables include a corrugated aluminum tape layer used to provide mechanical protection in duct installations.
What is steel tape armored fiber cable?
Steel tape armored fiber cables use a steel armor layer that offers stronger protection against external pressure and environmental stress.
What is the difference between GYTA and GYTS fiber cable?
GYTA cables use aluminum tape armor while GYTS cables use steel tape armor for enhanced mechanical protection.
Discuss Your Fiber Network Deployment
Selecting the right armored fiber cable depends on installation environment and mechanical protection requirements.
Our team can help review your project conditions and recommend suitable fiber cable structures.