AT&T IPC-1600 manual Hardware Device Class

Definition of IPC-1600 Device Node Names

Hardware Device Class

The ttyihxyy provides the standard EIA RS-232C hardware handshaking and monitors the following:

■Data Carrier Detect (DCD)

■Clear To Send (CTS)

■Ring Indicator (RI).

The detection of the DCD loss causes the port to log off if the Hang UP on final CLose (HUPCL) flag is set. In addition, the presence of the CTS signal enables the IPC-1600 transmitter and the presence of the DCD signal enables the IPC-1600 receiver.

The /dev/ttyihxyy device type directs the IPC-1600 to:

■Turn ON the RS-232C control signals, such as Data Terminal Ready (DTR) and Request To Send (RTS)

■Monitor these input status signals:

—Clear To Send (CTS)

—Data Carrier Detect (DCD)

—Ring Indication (RI).

The /dev/ttyihxyy device type must be used with I/O devices (terminals, printers, MODEMs, etc.) when RS-232C hardware handshake signals are desired (RTS and CTS).

MANAGING THE SERIAL PORTS 5-5