DTR(A signal used in serial communications sent, for example, by a computer to its modem to indicate that the computer is ready to accept an incoming transmission)
Data Terminal Ready(A signal used in serial communications sent, for example, by a computer to its modem to indicate that the computer is ready to accept an incoming transmission)
data terminal ready A signal used in serial communications sent, for example, by a computer to its modem to indicate that the computer is ready to accept an incoming transmission
