Dell OptiPlex 390 - Internal Speaker; Removing the Internal Speaker

DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK —FINAL
25
PS2/SERIAL ADD IN DONGLE
MT DT SFF
Connector type RS232 and PS2
Controller Details
Interface type 24 pins header connect to MB directly
IO Ports 1 Serial, 2 PS2
Full height PS2/Serial add in dongle Optional
Half height PS2/Serial add in dongle Optional
Environment
Operation Temperature 0° C to 70° C (32° F to 158° F)
Operation Humidity 20% to 80% (non-condensing)
Storage Temperature -20 to 85°C (-4 to 185°F)
COMMUNICATIONS—PS2/SERIAL ADD IN DONGLE
NO T E: M T s u p por t s ful l h e i g h t ( F H )
dongle
an d D T a nd S F F supp o r ts low pro file (LP ) do n g l e.