Australian Information Security Manual

Guidelines for communications systems

Australian Information Security Manual ISM-0548: Video conferencing and IP telephony calls are established using a secure session initiatio

Video conferencing and IP telephony calls are established using a secure session initiation protocol.

Maintained by Gerard BlokdykVerified against the published standard 31 May 2026Control text last updated 21 May 2026

Other controls in Guidelines for communications systems

ISM-0229 Personnel are advised of the permitted sensitivity or classification of information that c
ISM-0230 Personnel are advised of security risks posed by non-secure telephone systems in areas whe
ISM-0231 When using cryptographic equipment to permit different levels of conversation for differen
ISM-0232 Telephone systems used for sensitive or classified conversations encrypt all traffic that
ISM-0233 Cordless telephone handsets and headsets are not used for sensitive or classified conversa
ISM-0235 Speakerphones are not used on telephone systems in TOP SECRET areas unless the telephone s
ISM-0236 Off-hook audio protection features are used on telephone systems in areas where background
ISM-0245 MFDs are not connected to digital telephone systems.

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