How it works
High availability needs more than a standby server: SIP routing, state, data stores and upstream links must be tested. Protecting telephony and customer data combines technical controls, access rights and organisational processes. Different communication channels can require different safeguards.
Business example
A company uses redundant servers and routes to reduce downtime when its main site fails.
What to consider
Review lawful data handling, key and access management, retention periods, audit trails and recovery procedures. No single mechanism replaces an overall security policy.