Asking for the serial number of printer HP LaserJet

Dear all,

I am sticking in the printing problem. My same problem is here (http://h30499.www3.hp.com/t5/Black-and-White/Query-printer-for-Serial-Number/m-p/2672762#.UcgXI6EW05p) but I could not add my question in this thread because it had been closed. Thus I post the same question here.

I want to manage the printer serial-number, which could be retrieve from the Linux OS (Ubuntu 13.10). Currently, I used the lsusb -v to get the iSerialnumber from terminal. And the printer firmware show me these information

idVendor           0x03f0 Hewlett-Packard
  idProduct          0x042a 
  bcdDevice            1.00
  iManufacturer           1 Hewlett-Packard
  iProduct                2 HP LaserJet Professional M1132 MFP
  iSerial                 3 000000000QH783J9PR1a

But the real serial number in the back of printer is "CNJ8DDFF48". And I want to get the real one by command line (instead of the reading the barcode beside the device). As the recommendation from the thread (http://h30499.www3.hp.com/t5/Black-and-White/Query-printer-for-Serial-Number/m-p/2672762#.UcgXI6EW05p) it looks  possible if I use the PJL command from LINUX, however, I can't know how to download and use this PJL cmd from my UBUNTU OS. 

Hope you could help me solving my problem.

Thanks and best regards, 

Quang Nguyen.