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9
KX-NS0180X
4.2.2.
Description of Functions and Circuits(LCOT)
4.2.2.1.
Dial Pulse Signal Transmission
Transmits 10pps/20pps dial pulse by a open/close action between Tip and Ring with Photo MOS relay.
The make width, break width and inter digital width for 10pps/20pps can be set respectively.
When making, 37pin (DIAL [0]) of IC203 becomes Low level, and RL3 turns ON. When breaking, 37pin (DIAL [0]) of IC203
becomes High level, and RL3 turns OFF.
It provides the SHUNT control function for the stabilization of line power depending on the destination. Turning ON PC5 when trans-
mitting pulse reduces the impedance at making, and stabilizes the line power.
The make width, break width and inter digital width for 10pps/20pps can be set respectively.
When making, 37pin (DIAL [0]) of IC203 becomes Low level, and RL3 turns ON. When breaking, 37pin (DIAL [0]) of IC203
becomes High level, and RL3 turns OFF.
It provides the SHUNT control function for the stabilization of line power depending on the destination. Turning ON PC5 when trans-
mitting pulse reduces the impedance at making, and stabilizes the line power.
4.2.2.2.
Circuit For Line Acquisition
Making CODEC (e.g. pin-37 of IC203, DIAL [0]) Low level, the photo MOS relay (RL3) turns ON and the line is acquired.
It is used in common as Dial Pulse transmitting circuit.
DC Loop Path :
It is used in common as Dial Pulse transmitting circuit.
DC Loop Path :
• Ring
→L1→D1→D2→J7→D3→RL3→Q4 (C-E)→R14→D3→L1→TH1→Tip
• Tip
→TH1→L1→D3→R14→Q4 (C-E)→RL3→D3→J7→D2→D1→L1→Ring
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