MH88628 Ver la hoja de datos (PDF) - Mitel Networks

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MH88628

Central Office SLIC

Mitel Networks 

MH88628

Preliminary Information

TIP

1

RING

2

TF1

3

TF2

4

RF1

5

RF2

6

LGND

7

LCA

8

VBat

9

DCRI

10

RGND

11

VRLY

12

RD

13

SEL1

14

SEL2

15

ESI

16

ESE

17

AGND

18

NATT

19

N1

20

N2

21

Z900

22

Z1

23

Z2

24

TX

25

RX

26

GTX0

27

GTX1

28

GRX0

29

GRX1

30

ACRI

31

Z600

32

NS

33

SHK

34

UD

35

IC

36

IC

37

IC

38

VEE

39

VDD

40

Pin Description

Figure 2 - Pin Connections

Pin # Name

Description

1

TIP Tip Lead. Connects to the “Tip” lead of subscriber line.

2

RING Ring Lead. Connects to the “Ring” lead of the subscriber line.

3

TF1 Tip Feed 1. Access point for balanced ringing. Normally connects to TF2.

4

TF2 Tip Feed 2. Access point for balanced ringing. Normally connects to TF1.

5

RF1 Ring Feed 1. Access point for balanced ringing. Normally connects to RF2.

6

RF2 Ring Feed 2. Access point for balanced ringing. Normally connects to RF1.

7

LGND Battery Ground. VBat return path. Connected to system’s energy dumping ground.

8

LCA Current Limit Set (Input). The current limit is set by connecting an external resistor to

ground. For 30mA default current, this pin is tied to GND.

9

VBat Battery Voltage. Typically -48Vdc is applied to this pin.

10

DCRI DC Ringing Voltage Input. A continuous 120Vdc is applied to this input.

11

RGND Relay Driver Ground Connection.

12

VRLY Relay Supply Voltage Connection.

13

RD Ring Drive (Output). Connects to ring relay coil.

14

SEL1 Select 1 (Input). Refer to Table 5

15

SEL2 Select 2 (Input). Refer to Table 5.

16

ESI External Signal Input. 12/16kHz meter pulse input.

17

ESE External Signal Enable. Applies the external signal to the line.

18

AGND Analog Ground. VDD and VEE return path.

19

NATT Network Balance AT+T Node. Connects to N1 for a network balance impedance of AT&T

compromise (350Ω + 1kΩ // 210nF); the device’s input impedance must be set to 600Ω.

This node is active only when NS is at logic high. This node should be left open circuit when

not used.

2-200

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