European TDM multiplex hierarchy

Higher level TDM multiplexing is used to combine E1 systems by interleaving bits from the various E1 inputs. For example, the E2 transmission system combines four E1 inputs into an 8.448 Mbps data stream byte interleaving. Additional bits are required for framing and control purposes. Table 6.5 illustrates the various ITU-T circuit designations and their corresponding bit rates.

Circuit Designation

Voice Channels

Data Rate (Mbps)

E1

30

2.048

E2

120

8.448

E3

480

34.368

E4

1920

139.264

E5

7680

European TDM multiplex hierarchy

Table 6.5

European TDM multiplex hierarchy

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