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XRT7300
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.1.1
PIN DESCRIPTION
PIN #
SYMBOL
TYPE
DESCRIPTION
43
MRING
MTIP
I
Monitor Ring Input:
The bipolar line output signal from TRING can be connected to this pin via a 270
Ω resistor in order to check for line driver failure. This pin is internally pulled
“High”.
44
I
Monitor Tip Input:
The bipolar line output signal from TTIP can be connected to this pin via a 270 Ω
resistor in order to check for line driver failure. This pin is internally pulled “High”.
9