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Segments Of Concatenated SMS Contain Unexpected Bytes In UDH (Doc ID 2715885.1)

Last updated on OCTOBER 26, 2020

Applies to:

Oracle Communications Network Charging and Control - Version 6.0.1 and later
Information in this document applies to any platform.


In Oracle Communications Network Charging and Control (NCC) version 6.0.1, Messaging Manager (MM) is a messaging system for mobile networks. It acts as a Virtual Message Point (VMP) for a variety of different messaging traffic.

There is an issue when the message that needs to be delivered is a concatenated Short Message Service (SMS), consisting of several segments. In the SMS message, the User Data Header (UDH) is a binary structure which may be present at the start.


UDH populated in segments normally contains 3 extra bytes  - CPI (Command Packet Identifier) - IEIb. This is expected to be delivered in the first segment only, but in our case it is also present in subsequent segments what is not in line with the specifications.




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