NDA-24296 CHAPTER 2
Page 105
Revision 1.0
PH-PC45
Emergenc y Alarm Controller

PH-PC45

Emergency Alarm Controller

1. General Function
The PH-PC45 (EMA) circuit card detects various kinds of alarms which might occur in the system, and
send s out infor ma tion about the de tected a lar m to the circ uits c oncerned. This circuit card can activate the
system MJ/MN LEDs on the TOPU. Additionally, this card can control the active/stand-by status of the
CPU in the case of dual configuration. For the 1 IMG system, this circuit card has the Music-On-Hold
sending function, too.
Figure 2-46 Location of PH-PC45 (EMA) Card in the System
DSP
CPU
CPR #0
EMA
IOC
MISC
GT
DSP
CPU
CPR #1
GT
I/O L ocal Bus I/O Local Bus
MISC Bus # 0 MISC Bus # 1