Opening an available PPP line involves the built-in
C_INIT command, pppd.
Run the built-in
C_INIT command, pppd, on the target system:
host% rsh target pppd device pppd device:info: Using interface ppp0 pppd device:notice: Connect: ppp0 <--> device pppd device:notice: local IP address local_addr pppd device:notice: remote IP address remote_addr
where device is either /dev/tty01 or /dev/tty02.
See pppd(1M) for details.