4.1 Overview
The Call Line Identification Protocol Interface Adaptator (CLIPIA) daughter board allows the
line impedance to be modified for:
- the CLIP function,
- the metering function.
A daughter board handles 4 lines. You need 2 CLIPIA daughter boards for an NDDI2-2
(LS/GS) board.
For more information on the CLIPIA board configuration, see NDDI2-2(LS/GS) - CLIPIA
Daughterboard - Configuration .
For more information on the CLIPIA board connection, see NDDI2-2(LS/GS) - External
connections .
4.2 CLIP function
You need a line impedance of 600 Ohms (conversation excluded) to use the CLIP protocol.
The CLIPIA board has, for each line, a relay controlled by the mother board allowing the
600-Ohm line to be connected when it is not in conversation mode.
4.3 Metering function
To manage accounting pulse reception on the line in some countries, you need a low
impedance of 12 or 16 KHz (selected by a build). The CLIPIA board comprises a resonant
circuit per line, a jumper allows a resonance at 12 or 16 KHz to be selected.
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4-1
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