If you have a multi-port serial card, this allows you to route data
between two ports. Useful if you have a modem connected to one port
and a dumb terminal (e.g. a PC) hanging off another, and want the PC
to transparently access the modem.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 4082    6344  64.3% -lh5- 9bc1 Jun 19  1994 SerialRouter
[generic]                 1769    6990  25.3% -lh5- dacc Jun 19  1994 SerialRouter.c
[generic]                 1532    2972  51.5% -lh5- 5385 Jun 19  1994 SerialRouter.doc
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         3 files    7383   16306  45.3%            Mar 18  1995