NEC NEAX2400 system manual Pad, Artd, Cdn=

							INSTALLATION
							Key Setting on Circuit Cards
				Table 4-4 Switch Setting Patterns for the DTI Card (Continued)
SWITCH NAME				SWITCH	SETTING	STANDARD	MEANING
				NUMBER		SETTING
SW5D					ON		Digital PAD ROM selection: Special specifica-
							tion
				1
							Digital PAD ROM selection: Standard specifica-
1	2	3	4		OFF	⋅
							tion
OFF
				2	ON	⋅	LAYER2 signal logic: Positive
					OFF		LAYER2 signal logic: Negative
				3	ON		Line fault is not notified to the upper CPU
					OFF	⋅	Line fault is notified to the upper CPU
				4	ON		Zero Code Suppression is not provided

Note: This switch setting is applicable for a system which adopts Associated Channel Interoffice Signalling (ACIS).

2.4Digital PAD Setting

The PA-24DTR card is equipped with a mask ROM in which the following typical PAD patterns have been already written. PAD value is determined by selecting a desired PAD pattern, which can be done by key setting of the SW 58 (elements 4, 5, 6) on the card, and programming of the PAD data by the ARTD com- mand - CDN = 30 (PAD). The PAD patterns and ARTD data correspond as follows.

Table 4-5 Digital Pad Setting

PAD				PAD Pattern [dB] (Selected by key setting)
DATA
					A→∝	Loss	A→∝	Loss	∝→ A Loss		∝→ A Loss
ARTD	PAD Pattern 1		PAD Pattern 2
					(Bothway)		(Receive)		(Bothway)		(Receive)
CDN=
30	SEND	RECEIVE	SEND	RECEIVE	SEND	RECEIVE	SEND	RECEIVE	SEND	RECEIVE	SEND	RECEIVE
1	2	2	-3	3	0	0	0	0	0	0	0	0
			Note
2	4	4	3	3	4	4	0	4	4	4	0	4
3	6	6	0	6	6	6	0	12	6	6	0	12
4	8	8	3	9	8	8	0	8	8	8	0	8
5			Key setting of SW 39-3,4 correspond to PAD values. (Regardless of PAD patterns)
7	0	0	0	0	Through	Through	Through	Through	Through	Through	Through	Through

Note: Stands for 3[dB] GAIN.

ND-70185 (E)CHAPTER 4

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