InetLab

I am searching a smpp client library to help me work with smsc.
But I have a little questions about Inetlab.
Did Inetlab support unicode character when submit or recevie the message?
Did Inetlab support the windows size setting in this library?
Did Inetlab support the deliver report since we submit an submit_sm to smsc?
Did Inetlab support the option field like message_payload to receive/submit a long message ?

Yes, Inetlab.SMPP supports unicode characters.
Inetlab.SMPP is class library, there is no Windows Forms part.
Yes, Inetlab.SMPP supports delivery receipt.
Yes, Inetlab.SMPP supports optional TLV parameters.

Sorry, the window size is the message traffic in one second.
Can I set how many message I can recevice and sent persecond?
We may need over 1000/ per second.

Only methods SubmitText and AdvancedSubmit use limit of messages per minute.
These methods use property client.SubmitSpeed.
Some SMSCs have limit of allowed SMS per minute. And when this limit is exceeded, SMSC returns status ESME_RTHROTTLED.

All other methods do not have limits. So SMS traffic depends on network and hardware.

You can test performance with applications SmppClientDemo and SmppServerDemo.