ISM-0551 · September 2026
Video conferencing unit and Internet Protocol phone authentication
Guidelines for communications systems / Video conferencing and Internet Protocol telephony / Video conferencing unit and Internet Protocol phone authentication
Official control wording
IP telephony is configured such that: - IP phones authenticate themselves to the call controller upon registration - auto-registration is disabled and only authorised devices are allowed to access the network - unauthorised devices are blocked by default - all unused and prohibited functionality is disabled.
Applicability
These are ASD’s applicability markings. Select and tailor controls for your system’s risk, classification and operating context with the system owner and authorising officer.
Implementation guidance
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Official source
ASD’s ISM OSCAL v2026.09.4 · Original catalogue JSON · Pinned checksums and edition details
Control source identifier: ism-0551. Check the official release before relying on this snapshot for an assessment.
Official control wording and applicability: Australian Signals Directorate, © Commonwealth of Australia 2026. September 2026 ISM, OSCAL v2026.09.4, reproduced under CC BY 4.0. Formatting is adapted for this website.
Latticework Systems’ implementation guidance is our interpretation. Provenance and scope.