HP Color LaserJet 5500 Technical Reference Manual page 285

4 EE Tray or Envelope Feeder
5 Any HCI Tray
YY = Media Code
00 Unknown Paper
01 Unknown Envelope
02 Letter Paper
03 Legal Paper
04 A4 Paper
05 Executive Paper
06 Ledger Paper
07 A3 Paper
08 COM10 Envelope
09 Monarch Envelope
10 C5 Envelope
11 DL Envelope
12 Japan B4 Paper
13 Japan B5 Paper
14 B5 Envelope
15 Custom Media Paper
16 J-Postcard (or JB4 paper—LaserJet 6P)
17 J-RoundTrip Postcard (or JB5 paper—
LaserJet 6P)
18 A5 Paper (or JPostcard—LaserJet 6P
19 Letter-R Paper (or JDoublePostCard—
LaserJet 6P)
20 A4-R Paper (or A5 Paper—LaserJet 6P)
21 A5-R Paper
Media Size
PJL Status Codes D-19