Understanding Adaptive Clock Recovery

The clock to drive TDM ports can be recovered from a TDM pseudowire using the Adaptive Clock Recovery (ACR) algorithm.

ACR recovers the TDM service clock based on the packet arrival rate and typically employed when no other clock is available in the network to achieve synchronization.

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Adaptive Clock Recovery
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The adaptive clock recovery uses techniques to filter out the Packet Delay Variations (PDV) introduced in the packet stream by the PSN and recovers the TDM service clock.

The Wander and the Jitter budgets are defined by G.8261 deployment cases (case 1-a, 2-a, 2-b). Network deployments that differ from above cases require deriving the budgets based on the deployment model.

Limitations: