Hi Matt, I was receiving the UUI like this:
User-to-User: 0004,0025487679,01495465,S,M,,RAE,CallBack,1169693340,7230;encoding=ascii,0004,0025487679,01495465,S,7230,6622,M," ",PreatInversiones,RAE," ";encoding=ascii;purpose=isdn-uui;content=isdn-uui
As you see, after the first "encoding=ascii" I received more information and in those cases the Call.UUIData was empty.
I am using User-to-User, not X-User-to-User.
Regards
I solved this by deleting at the SBC all the string after the first "encoding=ascii"
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Fabian Teves
Ingeneria de Comunicaciones
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Original Message:
Sent: 11-14-2025 09:40
From: Matt Kirkpatrick
Subject: Call.UUIData
Hi Fabian,
Yes we are seeing it in the pcap. It is sporadic and not happening on every call. Appears the header is X-User-to-user and doing some research appears this may cause sporadic issues with parsing Call.UUIData. Is this similar to your issue? If so, how did you resolve?
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Matt Kirkpatrick
perations System Administrator
Original Message:
Sent: 11-14-2025 07:12
From: Fabian Teves
Subject: Call.UUIData
Hi Kara,
when you say that you see that the Call.UUIData is being captured; where do you see it? In pcap trace?
I had a similar problem, and the cause was a malforming of the user-to-user header; the header was present at the SIP Invite but not in a correct way, so it was in pcap trace but Call.UUIData was empty.
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Fabian Teves
Ingeneria de Comunicaciones
Original Message:
Sent: 11-13-2025 08:10
From: Kara VanderBeek
Subject: Call.UUIData
Hi,
We are finding a few calls coming into our main Inbound call flow missing the Call.UUIData. I can see that is being captured prior to getting to our first flow. We do a Set Participant Data on it in the beginning of our first flow. But, I'm not sure where it's captured and why in some instances it may be missing. Any insight would be appreciated.
Thanks
#Telephony
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Kara VanderBeek
Athene USA
Automation Lead Analyst
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