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. 
  • 138 Users Found This Useful
Was this answer helpful?

Related Articles

PC2Phone dialer doesn't connect to server. I use Microsoft Windows Vista operating system and Windows Firewall is on.

This problem may be related to Microsoft Firewall settings. To resolve this you should go to the...

Can I use the SIPLink softphone in countries where voip is blocked?

Yes, thanks to our voip tunnel technology that enables making and receiving calls from behind any...

Can I have a special, unique design of softphone?

Yes, however it is charged extra. You can see some examples in our gallery or ask us by email.

Does VoipSwitch support STUN servers?

Voipswitch itself is handling with traffic that comes from devices that are behind NAT. We do not...

How to display account state information on an ip phone ?

There is a special page in the Web and Portal modules called get.aspx. Some ip phones have the...