PaperInfo.cbl is provided in the sample directory of AcuGT. Its output provides values that can be used with PAPER and PAPERTRAY.
Dell Laser MFP 1815 PCL 6 Paper formats (001) - Letter 8 1/2 x 11 in (005) - Legal 8 1/2 x 14 in (007) - Executive 7 1/4 x 10 1/2 in (009) - A4 210 x 297 mm Paper Trays (007) - Auto (001) - Upper tray (006) - Manual envelope
To direct your print to the printer Dell Laser MFP 1815 PCL 6, on paper format A4 210 x 297 mm and using the Upper tray, enter the following into CBLCONFI:
PRNFILE -Q Dell Laser MFP 1815 PCL 6;COPY=2;COLLATE=1