Polycom MGC-50/MGC-100 When the MCU is set as a DTE, MPI-8 Network Interface Data Stream

MGC Hardware and Installation Manual

MPI-8 Network Interface Data Stream

When the MCU is set as a DTE

The ISDN data stream flows from the ISDN telecommunication network through the DCE to the serial port (37-pin connector) on the MPI box. The data is then directed from the 37-PIN connector to the 160-PIN connector, which gathers data from four different ports, and channels the data stream to the 160-pin connector located on the MPI-8 front panel. The data is then converted from serial format to TDM format and flown to the Backplane information bus.

The master and the Backup clock must be set on spans of the same network type.

Since this is full duplex communication, the data is also flowing in the opposite direction. Figure 4-22 shows the data flow on an ISDN data stream.

MPI Box

DCE

Serial

160-PIN

37-PIN

connection

Channels 1-6

connector

connector

To the 160-PIN connector

nels

7-12

on the MPI-8 module

Chan

37-PIN connector

4

-1

3

1

6

37-PIN

n

ls

e

-

a

n

1

5

connector

h

1

C

ls

e

n

n

a

h

C

37-PIN connector

Serial

connection

T1 ISDN line

(23 channels)

Figure 4-23: MPI Data Flow when MCU is DTE

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