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In telecommunication, **data signaling rate** (**DSR**), also known as gross bit rate, is the aggregate rate at which data pass a point in the transmission path of a data transmission system.

- The DSR is usually expressed in bits per second.
- The data signaling rate is given by where
*m*is the number of parallel channels,*n*is the number of significant conditions of the modulation in the_{i}*i*-th channel, and*T*is the unit interval, expressed in seconds, for the_{i}*i*-th channel. - For serial transmission in a single channel, the DSR reduces to (1/
*T*)log_{2}*n*; with a two-condition modulation, i. e.*n*= 2, the DSR is 1/*T*, according to Hartley's law. - For parallel transmission with equal unit intervals and equal numbers of significant conditions on each channel, the DSR is (
*m*/*T*)log_{2}*n*; in the case of a two-condition modulation, this reduces to*m*/*T*. - The DSR may be expressed in bauds, in which case, the factor log
_{2}*n*in the above summation formula should be deleted when calculating bauds._{i} - In synchronous binary signaling, the DSR in bits per second may be numerically the same as the modulation rate expressed in bauds. Signal processors, such as four-phase modems, cannot change the DSR, but the modulation rate depends on the line modulation scheme, in accordance with Note 4. For example, in a 2400 bit/s 4-phase sending modem, the signaling rate is 2400 bit/s on the serial input side, but the modulation rate is only 1200 bauds on the 4-phase output side.

## Maximum rate

The *maximum user signaling rate*, synonymous to gross bitrate or data signaling rate, is the maximum rate, in bits per second, at which binary information can be transferred in a given direction between users over the telecommunications system facilities dedicated to a particular information transfer transaction, under conditions of continuous transmission and no overhead information.

For a single channel, the signaling rate is given by , where *SCSR* is the single-channel signaling rate in bits per second, *T* is the minimum time interval in seconds for which each level must be maintained, and n is the number of significant conditions of modulation of the channel.

In the case where an individual end-to-end telecommunications service is provided by parallel channels, the parallel-channel signaling rate is given by , where *PCSR* is the total signaling rate for *m* channels, *m* is the number of parallel channels, *T _{i}* is the minimum interval between significant instants for the

*I*-th channel, and

*n*is the number of significant conditions of modulation for the

_{i}*I*-th channel.

In the case where an end-to-end telecommunications service is provided by tandem channels, the end-to-end signaling rate is the lowest signaling rate among the component channels.

## Rates and standards

Data Rate | Standard |
---|---|

1.5 Mbit/s | USB 1.0 |

1.544 Mbit/s | Digital Signal 1 |

12 Mbit/s | USB 1.1 |

155 Mbit/s | OC-3 |

480 Mbit/s | USB 2.0 |

622 Mbit/s | OC-12 |

1063 Mbit/s | Fibre Channel (1GFC) |

1250 Mbit/s | GbE |

2125 Mbit/s | 2GFC |

2488 Mbit/s | OC-48 |

2500 Mbit/s | 2.5GBASE-T, InfiniBand |

2666 Mbit/s | OC-48(FEC) |

3125 Mbit/s | ×4 10GBASE-LX4 |

4250 Mbit/s | 4GFC |

5000 Mbit/s | 5GBASE-T, USB 3.0, USB 3.1 Gen 1 |

8500 Mbit/s | 8GFC |

9.953 Gbit/s | OC-192 |

10.000 Gbit/s | USB 3.1 Gen 2 |

10.3125 Gbit/s | 10 GbE, ×4 40GbE, ×10 100GBASE-CR10 |

10.51875 Gbit/s | 10GFC |

10.664 Gbit/s | OC-192 (FEC) |

10.709 Gbit/s | OC-192 (ITU-T G.709) |

11.100 Gbit/s | 10 GbE FEC |

14.025 Gbit/s | 16GFC "Gen 5" |

25.78125 Gbit/s | ×4 100GBASE-CR4 |

28.05 Gbit/s | 32GFC "Gen 6" |

28.05 Gbit/s | ×4 128GFC "Gen 6" |

120.579 Gbit/s | 100GBASE-ZR |

## See also

## References

- This article incorporates public domain material from the General Services Administration document: "Federal Standard 1037C".