Vodavi Starplus Triad 1/2/3 Installation Manual page 132

Main Processor Board (MPB) Installation
A 2-port Universal Asynchronous Receiver Transmitter (UART), provides
two asynchronous RS-232C output ports. One port is connected to a DB9
connector providing access for input of information to the system
database and output of data such as SMDR.
The second port drives the 2400 Baud On-Board Modem Circuit for
Remote access to the system's database and maintenance files. Access to
the Modem can also be provided to any CO line or Single Line port
connected to the system. This connection is based on attributes in the
system database.
An eight position dip switch is employed to control specific operating
characteristics of the MPB.
A bank of eight LEDs indicate the operation status of the MPB. On power
up or reset, the software initiates a self-test routine. During this routine,
the LEDs 1-8 illuminate in sequence as each bank of 64K bytes or RAM is
tested and passes. Each LED remains lit until RAM testing is complete,
then the LEDs respond to MPB resource testing.
There is a single dip switch located above the PMU and below the lithium
battery. This switch controls the battery backup function of the MPB. This
switch should be set to the ON position.
Before installing the MPB, install the daughter boards as required. Refer
to Figure
Before programming the system, switch 8 should be placed in the ON
position and power cycled off and on to initialize the system database to
default. Once the database has been initialized, switch 8 should be
placed in the OFF position to protect the database.
3-14.
Use extra care when removing RS232 cables fromthe
SIUboards.Hold the MPB/MISU card in the cardslot before removingthe
RS-232 cable.Failure toperformthis action may result in the MPB/MISU
card being pulled from its' slot.
3-29
Triad 1/2/3 MPB or