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1.10 Connectors
1.10.1 Rear panel ports
1. PS/2 Keyboard/Mouse Combo port (purple). This port is for a PS/2 keyboard or
mouse.
2. Optical S/PDIF_OUT port.
This port connects to an external audio output device via
an optical S/PDIF cable.
3. VGA port.
This 15-pin port is for a VGA monitor or other VGA-compatible devices.
4. USB 2.0 ports 3 and 4
. These two 4-pin Universal Serial Bus (USB) ports are for USB
2.0 devices.
5. LAN (RJ-45) port.
This port allows Gigabit connection to a Local Area Network (LAN)
through a network hub.
LAN port LED indications
Activity/Link LED Speed LED
Status Description Status Description
OFF No link OFF 10Mbps connection
ORANGE Linked ORANGE 100Mbps connection
BLINKING Data activity GREEN 1Gbps connection
LAN port
SPEED
LED
ACT/LINK
LED
6. Center/Subwoofer port (orange). This port connects to the center/subwoofer
speakers.
7. Rear Speaker Out port (black).
This port connects to the rear speakers in the
4, 6, and 8-channel audio congurations.
8. Line In port (light blue).
This port connects to the tape, CD, DVD player, or other
audio sources.
9. Line Out port (lime).
This port connects to a headphone or a speaker. In the 4, 6 and
8-channel congurations, the function of this port becomes Front Speaker Out.
10. Microphone port (pink).
This port connects to a microphone.
11. Side Speaker Out port (gray).
This port connects to the side speakers in the
8-channel audio conguration.
Refer to the audio conguration table on the next page for the function of the audio ports in
the 2, 4, 6, or 8-channel conguration.
ASUS M4A78-EM 1-19