C        PTY and Terminal I/O variables

      COMMON /CHANCH/ RLINE
      CHARACTER*160   RLINE        ! Receive buffer for PTY
      CHARACTER*12    PTYCOM,PTYTER! PTY Command/Terminal device names  

      COMMON /CHANEL/ MCHAN,RCV_STAT(4),LCHAN,MTIME,ECHO
      INTEGER         MCHAN        ! PTY channel
      INTEGER*2       RCV_STAT     ! Read status
      INTEGER         LCHAN        ! Terminal channel
      INTEGER         MTIME        ! Status of timer
      LOGICAL         ECHO         ! Display received data