I'm new to SMPP protocol. I'm using it for sending SMS via SMSC. I found in docs that it is possible to send optional TLV parameters.
I want to send additional_status_info_text in submit_sm and receve it back in deliver_sm. Is it by spec of SMPP or not?
Not entirely sure, but I don't think it is by spec. I remember additional_status_info_text being used mostly to send extra information, like for debugging purposes.
You want to receive in the deliver_sm with the delivery receipt for your submit_sm the info you sent in the TLV or ?
Maybe if you could give more details about what you are trying to achieve exactly with the return of that parameter, I could be of more help.