Hello, On SMPP specifications (v 3.4) we can see:
5.3.1 Optional Parameter Tag Identifiers Optional Parameters are fields, which may be optionally included in an SMPP message. Optional Parameters must always appear at the end of a message, in the "Optional Parameters" section of the SMPP PDU. However, they may be included in any convenient order within the "Optional Parameters" section of the SMPP PDU and need not be encoded in the order presented in this document. For a particular SMPP PDU, the ESME or SMSC may include some, all or none of the defined optional parameters as required for the particular application context. For example a paging system may in an SMPP submit_sm operation, include only the callback number related optional parameters. All SMPP optional parameters have a 16 bit Parameter Tag Identifier. The SMPP protocol defines the following Parameter Tag blocks: Does one of you know if Kannel supports it? -- Best regards, Benoît
