ARIA SOHO Hardware Description and Installation Manual
Issue 1
BOARD INSTALLATION
Aug, 2006
45
4.5.6 CMU50PR (Call Metering-50Hz and Polarity Reversal Detection Unit)
The Call Metering-50Hz and Polarity Reversal Detection Unit (CMU50PR) provides 3 Call Metering Detection circuits
for 50Hz and provides 3 channels of Polarity Reversal Detection for Call Metering or signaling. It can be installed on
MBU, EMBU, CHB308 and CSB316.
FIGURE 4.5.6 CMU50PR