PEB2055 Просмотр технического описания (PDF) - Siemens AG

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PEB2055

Extended PCM Interface Controller EPIC®-1, EPIC®-S

Siemens AG 

PEB 2055

PEF 2055

Overview

1.7.1.3 Central D-Channel Processing

In this application the EPIC not only switches the B-channels and performs the C/I- and

monitor channel control function, but switches also the D-channel data onto the system

highway. In upstream direction the EPIC can combine up to four 16-kbit/s D-channels

into one 64-kbit/s channel. In downstream direction it provides the capability to distribute

one 64-kbit/s channel to four 16-kbit/s channels.

IOM R -2

Interface

B, D

EPIC R

Example Frame Structure

B

B ... B D D D D B

PCM

Highway

µP

HSCX

Signaling

Highway

ITS09535

Figure 7

Digital Line Card Architecture with a Completely Central D-Channel Handling

Semiconductor Group

20

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