Dell 3115cn Color Laser Printer User Manual page 601

Specifies multipurpose feeder.
-M=type
Specifies multipurpose feeder Paper Type.
Available multipurpose feeder Paper Types are as follows:
B
FinePaper/Bond/Plain Paper 2
BB
FinePaperBack/Bond/Plain Paper 2 - Side 2
P
Stationary/Plain/Plain Paper 1
PB
StationaryBack/Plain/Plain Paper 1 - Side 2
H1
ThickPaper/Heavyweight 1/Covers 1
H1B
ThickPaperBack/Heavyweight 1/Covers 1 - Side 2
H2
ThickPaper2/Heavyweight 2/Covers 2
H2B
ThickPaper2Back/Heavyweight 2/Covers 2 - Side 2
OHP
Transparency
L
LabelPaper/Labels
C2
Coated/Coated 2/Coated Paper 2
C2B
Coated Back/Coated 2/Coated Paper 2- Side 2
C3