2N BlueStar, User Manual

Page: 29 / 177

Plug-In Boards 2.1
29
AUX Board
Board Description
The AUX board contains a switching array and storage of voice messages controlled by
an independent processor system separated from the system bus. The AUX port is
used for making test calls or recording voice messages. The input amplifier is designed
for an electret microphone, the output amplifier for 150 Ohm earphones. The board is
designed on a 4-layer PCB of the size of 160x100mm. A serial interface COM2,
handset or headphone connector, and 5 board status indicators lead to the front
panel.
COM2 Serial Port Parameters
The COM2 interface is used as a supervision port for remote connection of a PC
(terminal) using the ISDN or analogue modem (also for loading voice messages into
the AUX board processor memory). It provides remote monitoring, configuration,
tracing and firmware upgrade.
Transmission rate 57.6 kips
Bit format start, 8bit, stop (no parity)
Signals complete 9-pin wiring
Board supply indication
Shining: Switched on
Flashing: The board is in the sleep mode
Board initialisation or error state
Shining (up to 1 minute): Firmware upgrading
Continuous shining or flashing: Board initialisation failure
Activity on AUX port (analogue interface)
Shining: Waiting for incoming call (AT!W…)
Flashing: A call through the AUX port
Light off: AUX port disconnected
The Rx and Tx LEDs flash to indicate data reception or
transmission through COM2.
A serial interface shared by the main basic CPU and AUX
card CPU. The type of the CPU used is determined by the
jumpers located on the AUX board. The main basic CPU is
installed by default.
An analogue interface for test calls with a headset