Hi, All:

A few days ago, I posted a LCD muddy problem, the problem is still unsolved, I will try other LCD instead.

Modem problem, the path of items:

PC<--->modem<--->modem<-->51 CPU.

1. when using 9600 baud, connection is established, I can send the command from PC to 51 CPU, 51 CPU got the command and send the information back, Verfied using monitor between Modem and 51 CPU.

2. when using 1200 baud, connection can't be established, so I tried the different baud rates, 1200, 2400 failed, 4800, 9600 and 19200 are OK.

Does any body have any idea?

Thanks in advance.

Frank