PCD5096 datasheet(33/52 Pages) PHILIPS

33 / 52 page

1997 Jan 22

Philips Semiconductors

Preliminary speciﬁcation

Universal codec

PCD5096

12 APPLICATION INFORMATION

12.1

Small business systems

The PCD5096 is designed for business and residential phone systems. In combination with a processor like the

PCD5093, two simultaneous calls on 2 PSTN lines (Ba, Bb) can be processed. To realize single line systems with

hands-free functionality one analog interface port can be connected to a speaker phone and the other to the line

interface. A typical small business system consists of a PCD5093 DECT processor with radio interface and a single

universal codec (see Fig.19).

The possible configurations for speech connections in the universal codec are listed in Table 34.

A real hands-free solution can also be implemented by using one PSTN line port and connecting a corded handset, a

hands-free microphone and a loudspeaker to the second analog interface port of the universal codec.

Table 34 Possible speech connections in a small business system

SINGLE CONNECTIONS

DUAL CONNECTIONS

LOCAL

↔ Ba

(LOCAL

↔ Ba) + (Bb ↔ PPa)

(LOCAL

↔ Ba) + (Bb ↔ PPb)

LOCAL

↔ Bb

(LOCAL

↔ Bb) + (Ba ↔ PPa)

(LOCAL

↔ Bb) + (Ba ↔ PPb)

LOCAL

↔ PPa

(LOCAL

↔ PPa) + (Ba ↔ PPb)

(LOCAL

↔ PPa) + (Bb ↔ PPb)

LOCAL

↔ PPb

(LOCAL

↔ PPb) + (Ba ↔ PPa)

(LOCAL

↔ PPb) + (Bb ↔ PPa)

↔ PPa

(Ba

↔ PPa) + (Bb ↔ PPb)

−

↔ PPb

(Ba

↔ PPb) + (Bb ↔ PPa)

−

↔ PPa

−−

↔ PPb

−−

Fig.19 Small business system.

handbook, full pagewidth

MBH857

ECHO

CANCELLATION

DSP

PCD5096

PCD5093

IOM

I2C

2 x

PSTN

RADIO

CIRCUIT

PPa, PPb

local

(speaker phone)

IOM

I2C

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