set echo(display characters which are sent)
Line wrap : press ‘enter‘ to send ‘\r‘(0x0D), go back to the beginning of a line
New line mode : press ‘enter‘ to send ‘\n‘(0x0A), newline
the setting of serial port in the SecureCRT
原文：http://www.cnblogs.com/god-of-death/p/6172095.html