NDA-24296 CHAPTER 2
Page 105
Revision 1.0
PH-PC45
Emergency 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
sends out information about the detected alarm to the circuits concerned. 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 Local Bus I/O Local Bus
MISC Bus # 0
MISC Bus # 1