LG-Nortel IPLDK 20 Installation Manual page 34

IP LDK-20 Installation Manual
3.3.1.1 Pin Assignment
LCOB
CONNECTOR
RJ45
CONNECTOR FUNCTIONS
CONNECTOR
CN2 and CN3
CN1, CN2 and CN3
MJ1
3.3.1.2 Add-On Boards
PRU4 (Polarity Reversal detection Unit)
Description
The PRU4 can be optionally mounted on LCOB, and provides Polarity Reversal detection for call metering.
PIN NUMBER
FUNCTION
PRCPTU4 or PRU4 connection
CPCU4 connection
2 ports RJ45 type CO line connection.
Figure 3.3.1.2a PRU4
NO
1,2
3
4,5
6,7,8
30
Board Installation
SIGNAL NAME
CO-R, CO-T
Reserved
CO-R, CO-T
Reserved
REMARK