Daktronics Galaxy AF-3400 34 mm Monochrome/RGB - Manual (Page 33)

Signal Installation
4.9 Modem Communication
If the communication system works with a modem, look for:
• a modem (internal or external) at the computer that connects to a phone jack
• a phone line connects to the display
Figure 23: Modem Communication Layout
Connections
• Computer modem (internal or external) to phone jack − phone cable plugs into both.
• Phone jack to modem at display − signal runs on a local dedicated telephone line. (This
line can not run through a switchboard.)
• Modem board in enclosure to display − quick-connect cable from enclosure to top jack
on display back.
Troubleshooting
Components
Check:
Cable
Connections:
•
The phone line is connected from the modem at computer to phone jack.
•
The two phone wires are connected at the modem board (wire color is
determined by the phone company).
•
The wires are making good electrical contact with the metal, no interference.
•
The cable is connected from the enclosure to the top jack on the display back.
Diagnostic
LEDs
•
The modem in the enclosure has the green LED on, indicating power.
•
The bottom red LED (carrier detect) is on when the modems are connected.
•
Transmit and receive LEDs flash when sending and receiving signal over the
telephone line; otherwise, they are off.
Display Power:
•
The display is either running a message or showing a single pixel flashing in
the bottom right corner of the display when power is on.
Software:
•
The software and the display are configured for dial-up communication and
the phone number is correct.
•
Refer to the software manual for other possible conditions.
25