Hi, some aspects of what you describe looks like the effects of Over-The-Top (OTT) bypass. This is a recent type of interconnect fraud, where regular international calls are hijacked and terminated on the OTT application installed on callee's phone. In this case, the gateway between the bypassing transit operator and the OTT network may increase the PDD. However, this effect is usually concealed with a ring tone. That could explain why you have 20+ seconds of ring time, but no connection at the other end. If you would like to read more about this, you can refer to our recent study on OTT bypass: http://s3.eurecom.fr/docs/ccs16_sahin.pdf Best regards, Merve

-------- Original Message -------- From: Shripal Daphtary <shripald at gmail.com> Sent: December 21, 2016 9:15:16 PM CET To: "VoiceOps at voiceops.org" <voiceops at voiceops.org> Subject: [VoiceOps] Long PDD to Israel

Hey guys -- long time no email!

We've been experiencing super long PDD and connection timeouts dialing +972 (israel).

we've sent traffic to bandwidth (10-11 seconds of pdd, followed by ring of 20+ seconds and no connection at the other end

we've sent traffic to L3 direct and its just a little bit better but still longer that one would expect.

i've called several numbers with my ATT mobile (not connected to our switch in any way) also long pdd or connection times.

Does anyone know if something changed within Israel to cause such long pdd's?

seems to be with all many of our carriers. All other international destinations seem to work fine.

thanks!

shri

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