To secure VoIP, both IP and VoIP-specific security procedures and best practices must be deployed at potential points of vulnerability, where the service or infrastructure may be susceptible to known or presumed attacks.

Threats to VoIP can be grouped into three primary areas:

Denial of Service
Fraud and Abuse
Data Confidentiality and Privacy

Security must be an integral element of all VoIP deployments from the beginning of the process and throughout the lifecycle management. Security is an on-going process requiring constant vigilance, and VoIP deployments must be closely monitored for new threats that could impact the service.

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