Installing the Hardware
Step 4: Configuring the Fax Boards
Octel 50 Installation Guide
3-8
Use caution when handling fax boards as they are electrostatic-sensitive. Make sure you
ground the PC, the work area, and the ground end of the antistatic wrist strap prior to
handling a board, and always use antistatic wrist straps and electrostatic-dissipative mats
while handling a board.
Configuring Brooktrout TR112 Boards
The TR112 is a 2-port fax card for use with the Fax Solution module.
Before installing the TR112 board, you must:
•
Set the board’s port address
•
Set the interrupt level
•
Set the DMA channel
Setting the TR112 Port Address
The PC and the Brooktrout boards communicate with each other through a shared
memory block that resides within the memory address space of the PC. You can modify
the physical address offset where this memory block is located by changing the dip
switches of SW1.
The default setting, 220, is acceptable for the first TR112 board. However, if you are
installing more than one TR112 board, the address must be changed as shown in the
following figure. The SW1 switch is located in the lower-right corner of the board and
contains eight dip switches.
