Which action must be taken before new VoIP systems are implemented on a network to ensure that the network is ready to handle the traffic?

VoIP traffic is highly sensitive to bandwidth constraints, latency, jitter, and packet loss, so a thorough assessment of current bandwidth utilization and link quality metrics must be performed before deployment to identify bottlenecks. This ensures QoS policies can be designed to guarantee the necessary service levels for voice traffic before the system goes live.

Enabling DID (Direct Inward Dialing) lines is a telephony feature configuration task performed after the network is confirmed ready, not a pre-deployment network readiness assessment.

Limiting the half-open session table on routers is a security measure related to TCP SYN flood protection and is unrelated to ensuring the network can handle VoIP traffic.

Checking anomaly detection for SIP and H.323 on Layer 3 devices is a security configuration concern, not a network readiness assessment required before VoIP implementation.