ttymux(7D)							      Devices								ttymux(7D)

NAME

       ttymux - Serial I/O multiplexing STREAMS device driver

SYNOPSIS

       multiplexer@0,0:input

       multiplexer@0,0:output

DESCRIPTION

       ttymux is a STREAMS  multiplexer driver that connects multiple serial devices to the system console. Using this driver, input from multiple
       physical devices can be multiplexed onto a single input stream for the system console. Output written to the console can be distributed	to
       multiple  physical  devices  to provide redundant console interfaces to a system. Input and output can be multiplexed to or from a separate
       list of devices.

       ttymux is a STREAM's multiplexer for serial drivers (such as se(7D)) that comply with the Solaris terminal subsystem interface.

       Currently, multiplexer interfaces are provided for system console I/O only and not for general serial I/O multiplexing. Multiplexer  inter-
       faces are currently not available for all platforms. Please see NOTES.

FILES

       /kernel/drv/sparcv9/ttymux    64- bit ELF kernel module

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |SPARC (NetraCT series only)  |
       +-----------------------------+-----------------------------+

SEE ALSO

       se(7D), termio(7I)

       Writing Device Drivers

NOTES

       Successful  loading  of	this  driver  and its services depends on the EEPROM or NVRAM settings in effect at the most recent system reboot.
       Without the platform firmware support, this feature cannot be enabled. Currently, this support is provided only on a NetraCT  product  fam-
       ily.

       Use  caution  when  enabling  this feature to perform console input multiplexing, particularly during super-user login. Because no security
       measures are enabled when the driver is in operation, you must clearly understand the security implications involved in using this  feature
       and  take  appropriate  measures  to  provide  maximum  protection to the host. This can include such steps as enabling input to physically
       secured console devices only.

       The ttymux driver does not handle the behavioral differences in control characteristics of different terminal types (for example, an ESCAPE
       sequence.) As a result, multiple terminal types are not supported simultaneously. Please refer to the platform user guide for more informa-
       tion.

SunOS 5.11							    20 Jul 2001 							ttymux(7D)