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diff --git a/ACE/ace/TTY_IO.h b/ACE/ace/TTY_IO.h
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+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file    TTY_IO.h
+ *
+ *  $Id$
+ *
+ *  @author Douglas C. Schmidt <schmidt@uci.edu>
+ */
+//=============================================================================
+
+#ifndef ACE_TTY_IO_H
+#define ACE_TTY_IO_H
+
+#include "ace/DEV_IO.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+/**
+ * @class ACE_TTY_IO
+ *
+ * @brief Class definitions for platform specific TTY features.
+ *
+ * This class represents an example interface for a specific
+ * device (a serial line). It extends the capability of the
+ * underlying DEV_IO class by adding a control method that takes
+ * a special structure (Serial_Params) as argument to allow a
+ * comfortable user interface (away from that annoying termios
+ * structure, which is very specific to UNIX).
+ */
+class ACE_Export ACE_TTY_IO : public ACE_DEV_IO
+{
+public:
+  enum Control_Mode
+  {
+    SETPARAMS,              ///< Set control parameters.
+    GETPARAMS               ///< Get control parameters.
+  };
+
+  struct ACE_Export Serial_Params
+  {
+    Serial_Params (void);
+
+    /** Specifies the baudrate at which the communnication port operates. */
+    int baudrate;
+    /** Specifies the minimum number of bytes in input buffer before XON char
+        is sent. Negative value indicates that default value should
+        be used (Win32). */
+    int xonlim;
+    /** Specifies the maximum number of bytes in input buffer before XOFF char
+        is sent. Negative value indicates that default value should
+        be used (Win32). */
+    int xofflim;
+    /** Specifies the minimum number of characters for non-canonical
+        read (POSIX). */
+    unsigned int readmincharacters;
+    /** Specifies the time to wait before returning from read. Negative value
+        means infinite timeout. */
+    int readtimeoutmsec;
+    /** Specifies the parity mode. POSIX supports "none", "even" and
+        "odd" parity. Additionally Win32 supports "mark" and "space"
+        parity modes. */
+    const char *paritymode;
+    /** Enable & set CTS mode. Note that RTS & CTS are enabled/disabled
+        together on some systems (RTS/CTS is enabled if either
+        <code>ctsenb</code> or <code>rtsenb</code> is set). */
+    bool ctsenb;
+    /** Enable & set RTS mode. Note that RTS & CTS are enabled/disabled
+        together on some systems (RTS/CTS is enabled if either
+        <code>ctsenb</code> or <code>rtsenb</code> is set).
+        - 0 = Disable RTS.
+        - 1 = Enable RTS.
+        - 2 = Enable RTS flow-control handshaking (Win32).
+        - 3 = Specifies that RTS line will be high if bytes are available
+              for transmission. After transmission RTS will be low (Win32). */
+    unsigned char rtsenb;
+    /** Enable/disable software flow control on input. */
+    bool xinenb;
+    /** Enable/disable software flow control on output. */
+    bool xoutenb;
+    /** Specifies if device is a modem (POSIX). If not set modem status
+        lines are ignored. */
+    bool modem;
+    /** Enable/disable receiver (POSIX). */
+    bool rcvenb;
+    /** Controls whether DSR is disabled or enabled (Win32). */
+    bool dsrenb;
+    /** Controls whether DTR is disabled or enabled. */
+    bool dtrdisable;
+    /** Data bits. Valid values 5, 6, 7 and 8 data bits.
+        Additionally Win32 supports 4 data bits. */
+    unsigned char databits;
+    /** Stop bits. Valid values are 1 and 2. */
+    unsigned char stopbits;
+  };
+
+  /** Interface for reading/writing serial device parameters. */
+  int control (Control_Mode cmd, Serial_Params *arg) const;
+
+#if defined (ACE_NEEDS_DEV_IO_CONVERSION)
+  /** This is necessary to pass ACE_TTY_IO as parameter to DEV_Connector. */
+  operator ACE_DEV_IO &();
+#endif /* ACE_NEEDS_DEV_IO_CONVERSION */
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#endif /* ACE_TTY_IO_H */