NEC NEAX 2400 IPX, Руководство пользователя

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NDA-24299 CHAPTER 4
Page 41
Revision 1.0
INSTALLATION
Key Setting on Circuit Cards
Note: This switch setting is applicable for a system that adopts Associated Channel Interoffice Signalling (ACIS).
2.4 Digital 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 with the selection of 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
command - CDN = 30 (PAD). Refer to
Table 4-5 for the PAD patterns and ARTD data.
Note: Stands for 3[dB] GAIN.
SW5D
1
ON
Digital PAD ROM selection: Special
specification
OFF
×
Digital PAD ROM selection: Standard
specification
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
Table 4-5 Digital Pad Setting
PAD
DATA
ARTD
CDN=
30
PAD Pattern [dB] (Selected by key setting)
PAD Pattern 1 PAD Pattern 2
A
→µ
Loss
(Bothway)
A
→µ
Loss
(Receive)
µ→
A Loss
(Bothway)
µ→
A Loss
(Receive)
SEND RECEIVE SEND RECEIVE SEND RECEIVE SEND RECEIVE SEND RECEIVE SEND RECEIVE
1
2 2
-3
Note
3 0 0 0 0 0 0 0 0
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
Table 4-4 Switch Setting Patterns for the DTI Card (Continued)
SWITCH NAME
SWITCH
NUMBER
SETTING
STANDARD
SETTING
MEANING
1 2 3 4
OFF