I have to move a binary data between two computers. I developed the application, and tested on a local network. Everithing works fine. But when someone use a standard analog modem, the transfer hangs when the client app sends the data with "TcpClient.SendBuf(buff,toread,0);"
The server app waits for data, but nothing arrives.
Also tried Indy TidTCPClient with SendStram, and also with SendBuff but all of them failed. Always the same result, with hanging on waiting for data, but in the lan area all worked fine.
If some of you met any similar problem, please share me your expiriences.
By, Have a good day