Definition of IPC-1600 Device Node Names
Software Device Class
The /dev/ttyisxyy device type must be used for I/O devices (terminals, printers, MODEMs, etc.) when software flow control is desired.
The ttyisxyy class of device node names does not support hardware flow control via the standard Electronic Industries Association (EIA) RS-232C hardware handshaking signals (CTS and RTS). Flow control is provided under software control. Any change in the status of Data Carrier Detect (DCD) causes the getty to respawn.
The /dev/ttyisxyy name directs the IPC-1600 to ignore all RS-232C control signals, except Data Carrier Detect (DCD), and to use software flow control over the Transmit Data (TD) and Receive Data (RD) lines. Characters can be transmitted and received when DCD is not asserted. The connection is dropped when DCD is asserted and then dropped.
5-4 IPC-1600 USER’S GUIDE
