What is Post Dialing Delay (PDD)?

PDD stands for Post Dialing Delay, which is the time between the start of the call and the moment the phone of the called party starts ringing.
In other words PDD is considered as the time from the INVITE sent by an origination to the RINGING message from the termination. 
  • 389 Users Found This Useful
Was this answer helpful?

Related Articles

What else do I need apart from VoipSwitch ?

VoipSwitch software requires a windows based server. The package does not come with any hardware...

Can a reseller edit a client's Personal Data in VSR?

Yes, it can be done both in all VSR releases. For VSR 1.9, 2.0, 2.1 and 2.2 it is accessible by...

Do you have any suggestions for a firewall I can install Software or hardware.

Windows Firewall (software solution, part of Microsoft Windows Server OS). If an additional level...

Call logs are not visible on Voipswitch but users are able to call. Why?

At first, check is any filter used for calls window. It is possible that calls are not showed...

VoipSwitch doesn't start one or more listeners on port X, what's the reason?

Some ports may be already occupied by another application. You should close that application, or...