MH88631-1 Ver la hoja de datos (PDF) - Mitel Networks

Número de pieza

componentes Descripción

Lista de partido

MH88631-1

Central Office Interface (LS/GS)

Mitel Networks 

Preliminary Information

MH88631

Pin Description (Continued)

Pin # Name

Description

21

XB

External relay contact (K1) connection from XC (Pin 8), activated by loop seize control input

(RC1).

22

VEE Negative Power Supply. (-5V).

23

VDD Positive Power Supply. (+5V)

24 RXOUT Audio receive signal (output) tothe RXIN- (Pin 13), via an external decoupling capacitor

(C3).

25

VCC+ Positive analog Power Supply Voltage. (+12V).

26

GSR Gain Setting Receive (Input). Normally used to set the receive gain with an external

resistor connected to RXOUT (Pin 24).

27

TXIN- Transmit (Input). Differential audio signal from VTR- (Pin 6), via an external capacitor

(C4).

28

VCC- Negative Analog Power Supply Voltage. (-12V).

29

TXIN+ Transmit (Input). Differential audio signal from VTR- (Pin 6), via an external decoupling

capacitor (C1).

30

AGND Analog Ground.

31

VR

Audio Receive (Input). The four-wire audio signal input to the interface.

32

VX

Audio Transmit (Output). The four-wire audio signal output from the interface.

33

RGND Relay Ground.

34

GSX Gain Setting Transmit (Input). Normally used to set the transmit gain with an external

resistor connected to VX (Pin 32).

35

RC1 Relay Control 1 (Input). A logic high will activate the relay (K1) to provide loop seize

across Tip and Ring.

36 NETBAL Network Balance (Input). When there is no connection (open), the network is balanced at

600Ω. When the pin is grounded, the network is balanced at AT&T compromise.

37

RD1 Relay Driver 1 (Output). Open collector sinks current when RC1 is high. Diode clamp

protected.

38

CD Clamping Diode. Normally connects to the positive supply voltage.

39

RD2 Relay Driver 2 (Output). Open collector sinks current when RC2 is high. Diode clamp

protected.

40

RC2 Relay Driver 2 (Input). A logic high will activate the relay (K2) to provide proper biasing to

the Tip and Ring. This input control is used for Ground Start Trunk only.

2-227

Share Link: