Ensure Fibre-Optic Cables Replace Copper Cables
Use fibre-optic cables instead of copper to improve data security and efficiency in cabling infrastructure.
Plain language
This control is about replacing older copper cables with fibre-optic ones for your data connections. Fibre-optic cables are faster and more secure, reducing the risk of data being intercepted or lost due to the vulnerabilities of older copper cables.
Framework
ASD Information Security Manual (ISM)
Control effect
Preventative
Classifications
NC, OS, P, S, TS
ISM last updated
Feb 2021
Control Stack last updated
19 Mar 2026
E8 maturity levels
N/A
Section
Cabling infrastructureOfficial control statement
Fibre-optic cables are used for cabling infrastructure instead of copper cables.
Why it matters
Without fibre-optic cabling, copper runs can be more easily tapped via electromagnetic leakage, increasing interception risk and data compromise.
Operational notes
Maintain a register of all copper cabling; schedule replacement with fibre, verify no copper remains on backbone links, and document any approved exceptions.
Implementation tips
- IT team should conduct an inventory check: Identify and list all current cabling infrastructure to understand where copper cables are still in use. This involves checking server rooms, data centres, and office perimeters.
- Procurement should coordinate with approved vendors: Purchase fibre-optic cables and necessary installation components. Ensure suppliers adhere to quality and compliance standards recognised by the Australian Cyber Security Centre (ACSC).
- IT team should plan the installation: Develop a phased plan to replace copper with fibre-optic cables, prioritising critical areas with sensitive data. Coordinate with business units to minimise disruption.
- Managers should inform staff: Ensure all employees are aware of the cabling upgrade schedule and any temporary connectivity issues. Communication can be through email updates or staff meetings.
- Facilities team should oversee the work: Monitor the installation process to ensure it adheres to the safety and technical requirements. This involves inspecting the quality of work done and ensuring proper documentation of the new cabling layout.
Audit / evidence tips
- AskThe cabling inventory report: Request a document listing all cables in use before the upgrade GoodShows a detailed record distinguishing copper from fibre-optic cables
- AskPurchase orders or invoices from vendors: Review documentation related to fibre-optic cable acquisition GoodConfirms purchase of appropriate cable types and quantities
- AskThe installation schedule and plan: Review the documented plan showing how and when the fibre-optic cables are installed GoodIncludes realistic timelines and priority areas for fibre upgrades
- AskInternal communication records: Request emails or notes related to staff alerts about the cabling changes GoodShows comprehensive communication with staff about potential impacts
- AskA final inspection report: Check the report documenting that the cable installation meets technical and safety standards GoodIncludes sign-off from the facilities team or external inspector
Cross-framework mappings
How ISM-1111 relates to controls across ISO/IEC 27001, ISO/IEC 42001, Essential Eight, and ASD ISM.
ISO 27001
| Control | Notes | Details |
|---|---|---|
| layers Partially meets (1) expand_less | ||
| Annex A 7.12 | ISM-1111 requires organisations to use fibre-optic cables instead of copper for cabling infrastructure to reduce security and performance... | |
These mappings show relationships between controls across frameworks. They do not imply full equivalence or certification.