The SBC Core supports dialog stateful variables to allow storing values during SMM processing of messages, and then later using the same values for SMM processing of the other messages in the same dialog. The SBC supports dialog stateful variables for INVITE, REGISTER, and Out-of-Dialog SUBSCRIBE messages. The SBC also supports dialog stateful variables for Out-of-Dialog MESSAGE messages but only on the egress leg. That is, the dialog stateful variables for MESSAGE messages are created and accessed on the outgoing leg only. The values of stateful variables are preserved for the active dialogs. These values are accessible during the SMM rule processing on the subsequent messages.
The maximum supported size of data stored in a dialog stateful variable is 6 kB (6,144 bytes). The SBC ignores the data if the data size exceeds the size limit; no data is written in the variable.
When dialog transparency is enabled and "Advanced SMM" functionality is required:
inputAdapterProfile
and outputAdapterProfile
are provisioned, enable the advancedSMM
flag on both SIP Adapter Profiles (inputAdapterProfile
and outputAdapterProfile
).inputAdapterProfile
or outputAdapterProfile
), enable the advancedSMM
flag only for the provisioned SIP Adaptor Profile. Advanced SMM example: