How it works
A VPN can provide an encrypted network tunnel, but it does not eliminate latency, jitter or packet loss on a congested path. Protecting telephony and customer data combines technical controls, access rights and organisational processes. Different communication channels can require different safeguards.
Business example
A branch connects its IP phones to a central PBX through a managed VPN tunnel.
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.