All senders will be overwritten with a random South African Longcode. Sender Registration is not allowed.
Handset delivery reporting is supported.
Dedicated long codes are suitable for inbound SMS only. You can't use the long code to send messages.
Dedicated short codes support replies. The way it works is that you send using the short code, the network will actually send the SMS from a random long code. Any replies will be redirected back to the short code and will appear in your account as normal replies to the original SMS. A dedicated short code is the only way to support 2-way SMS for South Africa.