Asus ESC4000/IB - Manual (Page 15)

ASUS ESC4000 Series 1-3
1.2 Serial number label
Before requesting support from the ASUS Technical Support team, you must
take note of the product’s serial number containing 14 characters such as
xxS0xxxxxxxxxx. See the figure below.
With the correct serial number of the product, ASUS Technical Support team
members can then offer a quicker and satisfying solution to your problems.
xxS0xxxxxxxxxx
ESC4000