IP LDK-20 Installation Manual Board Installation
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3.3.1.1 Pin Assignment
LCOB
CONNECTOR
PIN NUMBER
NO
SIGNAL NAME
1,2 CO-R,
CO-T
3 Reserved
4,5 CO-R,
CO-T
RJ45
6,7,8 Reserved
CONNECTOR FUNCTIONS
CONNECTOR
FUNCTION
REMARK
CN2 and CN3
PRCPTU4 or PRU4 connection
CN1, CN2 and CN3
CPCU4 connection
MJ1
2 ports RJ45 type CO line connection.
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.
Figure 3.3.1.2a PRU4