PEB20954(1999) 데이터 시트보기 (PDF) - Infineon Technologies

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PEB20954
(Rev.:1999)

Smart Integrated Digital Echo Canceller

Infineon Technologies 

POTS

POTS

POTS

2 wires

SLIC

SLIC

SLIC

SLIC

4 wires

SICOFI

(CODEC)

PEB 2466

POTS

Echo

POTS

SICOFI

SLIC

(CODEC)

SLIC

PEB 2466

POTS

PBX:

SICOFI:

SLIC:

Private Branch eXchange

Signal Processing Codec Filter

Subscriber Line Interface Circuit

PEB 20954

PEF 20954

Introduction

PCM30

PBX

SIDEC

PCM30

FALC

LH

PEB 2255

E1/T1

POTS: Plain Old Telephone Service

FALC: Frame and Line Interface Component

Figure 4 SIDEC in a Private Branch Exchange (PBX)

SIDEC can be used in a PBX or Central Office (CO) to cancel the echo next to the

customer side (near end echo). The echo delay is kept short. The delay for this

application is usually less than 64ms and the SIDEC can cancel up to 32 channels.

Figure 4 shows a PBX with a T1/E1 interface FALC LH to the CO on the one side. On

the other side analog phones are connected.

A possible SIEMENS solution with the SICOFI (includes D/A and A/D conversion) and

the SLIC (hybrid) to connect the analog phone is shown above.

Preliminary Data Sheet

11

04.99

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