InetLab

We are trying to implement USSD using Inetlab.SMPP. When we submit a menu through Submit_SM, the message is split into two and the user receives a menu that is unreadable and truncated. This happens when the menu is long. Is there an implementation to stop this?

Then when the menu is short, the format for newline does not work. It just n\ beside each menu item.

Note that we already purchased a Developers's version of the Intelab.SMPP

It depends on the USSD service implementation on the provider side. I would ask the provider support how it should be sent. When you have an answer, I can help you to complete this with Inetlab.SMPP library.
The answer can be also that the message text is limited to 140 octets.

You can try to send the message in message_payload parameter.

For the new line try to user 0x0D

Thank you. Let me try these.