ASD ISM 1111Ensure Fibre-Optic Cables Replace Copper Cables
Official control statement
Fibre-optic cables are used for cabling infrastructure instead of copper cables.
Quoted as published. Everything else on this page is written by Control Stack.
In plain English
Use fibre-optic cables instead of copper to improve data security and efficiency in cabling infrastructure.
What this means in practice
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 (Control Stack)
Preventative
Classifications
NC, OS, P, S, TS
ISM last updated
Mar 2021
Control Stack last updated
29 Sept 2026
E8 maturity levels
N/A
Section
Cabling infrastructureTopic
Use of fibre-optic 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 upgradeLook atThe types of cable listed and locations usedGoodShows a detailed record distinguishing copper from fibre-optic cables
- AskPurchase orders or invoices from vendors: Review documentation related to fibre-optic cable acquisitionLook atCompliance with Australian standards and ACSC guidanceGoodConfirms 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 installedLook atThe timeline and affected areasGoodIncludes realistic timelines and priority areas for fibre upgrades
- AskInternal communication records: Request emails or notes related to staff alerts about the cabling changesLook atClarity and timeliness of communicationsGoodShows comprehensive communication with staff about potential impacts
- AskA final inspection report: Check the report documenting that the cable installation meets technical and safety standardsLook atVerification from a qualified professionalGoodIncludes 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 |
|---|---|---|
layersPartially 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.
Related ASD ISM controls in Communications infrastructure
See all Guidelines for communications infrastructure controls, or browse the full ASD ISM library.