[SIPForum-discussion] Post Dialing Delay (PDD)

[Hadriel Kaplan]

Afaik, ITU-T E.431 defines the PDD term, E.721 also defines it in a slightly different form, and several Q-series discuss details of it.  In the IETF, draft-ietf-pmol-sip-perf-metrics-00.txt has it as "Session Request Delay" (SRD).

-hadriel
P.s. If you're using an Acme Packet SBC to do this, it measures it and provides you that info in a couple different ways based on the operator preferences.  Since you work for Ericsson, I believe you should be able to get the documentation for how it does that.  I will send you the appropriate contacts, off-line.


> -----Original Message-----
> From: discussion-bounces at sipforum.org [mailto:discussion-
> bounces at sipforum.org] On Behalf Of Mario
>
> Hello Members,
>
> We are implementing a NGN to provide IP transport to both IP carriers
> and traditional PSTN.
>
> Our ustomer is asking us if we are able to measure the PDD (understood
> as the the delay between sending the initial INVITE ( and getting an
> indication that the called party is being alerted,e.g. 180) to provide
> this KPI to the IP carriers being conneted to our NGN.
>
> Can Anyone help me how we can measure and verify that the PDD is under
> a certain value?
>
> Is there any ITU-T value for the PDD to take as a reference?
>
> Our NGN provides the IP connetivity to IP carriers through Acmepacket
> SBCs.
>
> Thanks in advance for your help,
> Kind Regards,
> Mario
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