Program Module Unit (Pmu) - Vodavi Starplus Triad 1/2/3 Installation Manual

5-12
Function
Provides an asynchronous modem for
access to the system database and fault
reporting features from a remote site.
Provides an RS232 port for local access.
Function
Provides the system operating software.
Function
Provides Direct Current power to the
system in the form of -48VDC, +30VDC,
+5VDC, and -5VDC. LEDs on the Power
Supply Unit (PSU) in each cabinet show
presence of each voltage type.
Provides connections for batteries and
charging current for batteries (optional).
Table 5-11: Modem Unit (MODU)
Table 5-12: Program Module Unit (PMU)
Table 5-13: Power Supply Unit (PSU)
Fault Options
Can not access system database programming
remotely. (Also check Modem programming)
Second RS-232C port inoperative (Check
Modem Bypass programming).
Fault Options
The system does not operate without this
component.
Fault Options
System does not operate (Loss of +5VDC). Also
check +5VDC tolerance on PSU.
Analog phones and CO Line do not operate
(Loss of -5VDC).
DID Lines do not operate (Loss of -48VDC).
Battery Back-up for system not working. (Also
press Battery Restart switch on PSU)
System Functions