PH-PC36

Multiplexer

The PCM highway running is illustrated in Figure 2-40. There are sixteen 2 Mbps PCM highways (HW0 - HW15) in the PIM. Each PCM highway runs from a card slot to the MUX circuit card. For instance, highway number zero (HW0) appears in Slot 04 and also Slot 05, thus the HW0 carries the PCM of the Group number 0, 1, 2 and 3.

Likewise, the HW6, 7, 14, 15 cover the group numbers 24 through 31. However, the time slots of Group number 24 and 25 are exclusively used for the Speech Path Memory (SPM).

All highways in the PIM lead to a MUX card, so 512 time slots (32 time slots per highway 16 highways

=512 time slots) of PCM are multiplexed/de-multiplexed at a MUX and sent/received to/from the TSW circuit card across the 32.786 Mbps of the Low Voltage Differential Signaling (LVDS).

Also the MUX card provides the PM bus interface. The CPR controls and administrates the PM of the line/ trunk circuit card via the TSW and the MUX.

In addition, this circuit card supports 3-Party Conference (CFT) function and is equipped with eight circuits of 3-Party Conference. The CFT appear in Time Slots 8 through 31 of the HW13 (Group 21 - 23).

Slot number of the PIM U-A

8 circuits of CFTs

 

 

Group (G) number of the LENS

 

 

 

 

00

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

23

 

PWR

 

PWR

1

3

5

7

9

11

15 14

19 18

23 22

MUX#0

MUX#1

1

3

5

7

9

11

15 14

19 18

23 22

 

 

 

 

0

2

4

6

8

10

13

17

21

 

 

0

2

4

6

8

10

13

17

21

 

 

 

 

 

 

 

 

 

 

12

16

20

 

 

 

 

 

 

 

 

12

16

20

 

 

 

 

 

 

 

 

 

 

 

 

HW5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HW0

HW1

HW2

HW3

HW4

 

 

 

HW8

HW9

HW10

 

 

 

 

 

 

 

 

 

 

 

HW11 HW12 HW13

 

(24)

 

(25)

27

 

29

 

31

 

 

 

 

 

 

27

 

29

 

31

 

 

 

 

 

 

 

 

26

 

28

 

30

 

 

 

 

 

 

26

 

28

 

30

 

 

 

 

 

 

HW6

 

 

 

 

HW7

 

 

 

 

 

 

 

HW14

 

 

HW15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Group 24 and 25 are used for the SPM

2 Mbps (32 time slots) of PCM highway

Figure 2-40 PCM Highway Running

CHAPTER 2

NDA-24296

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Revision 1.0

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NEC 2400 ipx manual PCM Highway Running

2400 ipx specifications

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