Ultrix 3.0 - Reverse LAT on DECserver 100's - help

[doug berry]

i've tried:
    lcp -s -h /dev/tty35:AUNT:SISPRINT
  tty35 is not enabled in /etc/ttys, setup on AUNT as per manual.
  cat >>/dev/tty35  returns...
  no such device or address

and then:
    reboot, make entries in /etc/printcap for LAT printer
  LAT is started in /etc/rc.local
  lpr -P latprinter  returns
  no such device or address

This system has devices made for lta0 and lta1.
i can run a test on the port defined as SISPRINT and get output.

Am i doing something wrong?
Is this supported on the 100's?

Help.
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