Line Interface - Xerox 6110MFP/XN Service Documentation

Line Interface

This is Connection Part between system and PSTN(Public Switched Telephone Network), and primary circuit is usually
located. Main functions are Line Interface, Telephone Connection and Line Condition Monitoring.
1 Telephone Line Connection
Modular Plug : RJ-11C
LIU PBA Modular Type : 623 PCB4-4
Line Code Length : 2500
Line Code Color : Black
ON HOOK state Characteristic
1) DC Resistance
DP Dial Mode (Direct Current 30mA) : 50 ~ 300ohm
DTMF Dial Mode (Direct Current 20mA) : 50 ~ 540ohm
2) Ring Sensitivity
Ring detection Voltage : 40Vrms
product Margin : 30Vrms
Ring detection Frequency : 15.3Hz
product Margin : 15Hz
Ring detection Current : 20mA
product Margin : over 15mA
3) False Ring Sound
Ring Frequency : 750 Hz + 1020 Hz
Ring interrupt Cycle : On/Off depending on input Ring Signal Cycle.
50mm
150Vrms (condition : Current = 25mA, Frequency = 15Hz)
150Vrms
68Hz (condition : Voltage = 45Vrms, Current = 25mA )
70Hz
100mA (condition : Voltage = 40Vrms, Frequency = 20Hz)
System Overview
3-7