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PAGE 29
FireBall™ DVDM-300 User’s Manual
RS-232 CONNECTIONS
External disc changers are controlled via two-way serial protocols using RS-232 serial cables. You should use COM ports 1,2, and 3 for each external
disc changer.
COM port 4 is to be used for connecting an Escient ETP-1500 wired touch panel, external modem or to interface with a third party control system
such as AMX or Crestron.
If you are using both an Escient ETP-1500 touch panel and an external modem, connect the Escient ETP-1500 to COM port 3 and use COM port 4
for the external modem.
Note: You should use the Ethernet control system for controlling FireBall from a third party control system whenever possible. Using the Ethernet
control system frees up COM port 4 for other purposes, allows much longer distances between FireBall and the control system, and provides a much
faster path for data transfer.
EXTERNAL MODEM CONNECTIONS
Use of an external modem for connecting to the Gracenote and Escient disc lookup services should only be used if a broadband connection is not
available. Any external modem which supports the standard AT Hayes command set and supports a serial connection (RS-232) will work. USB
modems will not work. Contact Escient for more information on compatible modem options.
IR CONNECTIONS
The direct IR input jack on the back panel of the FireBall is for controlling FireBall from a wired IR distribution system such as a Xantech system.
This connection must be an IR signal with a 36kHz carrier using an 1/8” mono or stereo connector.
The IR input jack provides 12V power. This means that you can directly connect a 12V IR receiver (like the Xantech series 291 units) to the FireBall
using a 1/8” stereo connector.