NEC Neax 2400 Imx Circuit Card Manual

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PA-24LCBV
Line Circuit
PA-24LCBV
Line Circuit
1. General Function 
The PA-24LCBV circuit card provides an interface between a maximum of 24-analog terminals and the
system with a range of 600 (Ohm) inclusive of terminal resistance. This card also can send “Stutter Dial
To n e ,” which is not a continuous tone, to an associated terminal which has no Message Waiting Lamp
(MWL) instead of activating the MWL if required.
Figure 3-62   Location of PA-24LCBV(LC)...

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Line Circuit
3. Face Layout of Lamps, Switches and Connectors
The face layout of lamps, switches on this card is shown in Figure 3-63.
Figure 3-63   Face Layout of PA-24LCBV(LC) Card
OPE2
OPE1
BL23
BL0SW00 (MB)
BL23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CN
SW18
SW10
(BNW0-7) SW11
(BNW8-15)
SW12
(BNW16-23)
SW17SW13
SW14SW15
SW16 

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PA-24LCBV
Line Circuit
4. Lamp Indications
The contents of lamp indications on this card are shown below.
5. Switch Settings
Switches on the PA-24LCBV(LC) card have the following meanings.
LED NAME COLOR LED STATUS DESCRIPTION
OPE1 Green Steady Lighting The circuitry of Circuit #0-#7 is operating normally.
OPE2 Green Steady Lighting The circuitry of Circuit #8-#23 is operating normally.
BL0
~
BL23GreenSteady Lighting Line loop exists.
Flashing1) Ringing signal...

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PA-24LCBV
Line Circuit
SWITCH No. FUNCTION SWITCH SETTING MEANING
SW11
(BNW8-15)Balancing Network 
Designation
Each element on 
this switch corre-
sponds to Circuit 
#8-#15.[the same as previous page]
SW12
(BMW16-23)Balancing Network 
Designation
Each element on 
this switch corre-
sponds to Circuit 
#16-#23.[the same as previous page]
SW13
Selection of the UserSW13
-1SW13
-2SW13
-3SW13
-4
North America 
ON OFF OFF OFF
SW141 OFF Fixed to OFF
2Stutter
Dial...

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Line Circuit
SWITCH No. FUNCTIONSWITCH
SETTINGMEANING
SW15 1 OFF Fixed to OFF
2 OFF Fixed to OFF
3 OFF Fixed to OFF
4 OFF Fixed to OFF
SW16 1 OFF Fixed to OFF
2 OFF Fixed to OFF
3Message Waiting 
LampONMessage Waiting Lamp Flashing 
(Controlled by Firmware)
OFFMessage Waiting Lamp lit or Flashing 
(Selected and Controlled by Software)
4 OFF Fixed to OFF
SW17 1 OFF Fixed to OFF
2 OFF Fixed to OFF
3 OFF Fixed to OFF
4 OFF Fixed to OFF
5 OFF Fixed to...

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Line Circuit
Note 1:Compromise Impedance (EIA/TIA-464A) and 600
Ω are composed as follows. SWITCH No. FUNCTION SWITCH SETTING MEANING
SW18
 Polarity reverse or
 Momentary OpenON Momentary open
OFF Polarity reverse
ON OFF
OFF
Slide switch (RVS) (OPEN)ON
350   1000   
0.21 
Compromise Impedance (EIA/TIA-464B)   600    

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Line Circuit
6. Switch Setting Sheet
MODULE SLOT No. SWITCH NAME SWITCH SHAPE REMARKS
PIMSW00
(MB)Note:Normal operating mode is down.
SW10
(BNW0-7)
SW11
(BNW8-15)
SW12
(BNW16-23)
SW13
SW14
SW15
SW16
SW17
SW18
ON
1   2   3   4   5   6    7  8ON
1   2   3   4   5   6    7  8ON
1   2   3   4   5   6    7  8ON
 1   2   3   4ON
 1   2   3   4ON
 1   2   3   4ON
 1   2   3   4ON
1   2   3   4   5   6    7  8ON
OFF
(RVS) (OPEN)ON 

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PA-24LCBV
Line Circuit
7. External Interface
Accommodation of the LT connector leads and LC connector leads for this circuit card is shown in Figure
3-64.
(1)  PIM
When this circuit card is mounted in PIM, necessary leads appear on the LT connectors as follows.
Figure 3-64   LT Connector Lead Accommodation (PIM) (1/2)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
411
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
42
43
44
45
46
47
4817
18
19
20
21
22
23
49
5024
25...

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Line Circuit
Figure 3-64   LT Connector Lead Accommodation (PIM) (2/2)
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
411
2
3
4
5
6
7
8
9
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11
12
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15
16
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43
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46
47
4817
18
19
20
21
22
23
49
5024
25
232221201918171615141312111009080706050403020100
LT6 LT7 LT8 LT9 LT10 LT11LT0 LT1 LT2 LT3 LT4 LT5
23 19 15
22 18 14
21 17 13
20 16 1223 19 15
22 18 14
21 17 13
20 16 12 11 09 07 05 03 01
10 08 06 04 02 00 11 09 07 05 03 01
10 08 06 04 02 00
11...

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PA-24LCBV
Line Circuit
(2)  LC Connector Leads
Figure 3-65   LC Connector Lead Accommodation (LC Cable)
1A
2A
3A
4A
5A
6A
7A
8A1B
2B
3B
4B
5B
6B
7B
8BB0
B1
B2
B3
B4
B5
B6
B7 A0
A1
A2
A3
A4
A5
A6
A7
1A
2A
3A
4A
5A
6A
7A
8A1B
2B
3B
4B
5B
6B
7B
8BB0
B1
B2
B3
B4
B5
B6
B7 A0
A1
A2
A3
A4
A5
A6
A7
1A
2A
3A
4A
5A
6A
7A
8A1B
2B
3B
4B
5B
6B
7B
8BB0
B1
B2
B3
B4
B5
B6
B7 A0
A1
A2
A3
A4
A5
A6
A7
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49
501
2...