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What causes high Post Dial Delay (PDD) in VoIP calls, and how can it be minimized for better user experience?
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High PDD can be caused by long routing chains, low-priority carrier hops, or overloaded interconnects.
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Check for local PBX or SIP platform delays PDD might not always originate from the provider.
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Use direct routes or tier-1 carriers when fast connection is mission-critical, especially for enterprise or OTP calls.
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Avoid using NCLI or gray routes for latency-sensitive traffic these often introduce more delay.
What causes high Post Dial Delay (PDD) in VoIP calls, and how can it be minimized for
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