Data signaling rate
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In telecommunication, data signaling rate (DSR) is the aggregate rate at which data pass a point in the transmission path of a data transmission system.
Notes:
- The DSR is usually expressed in bits per second.
- The data signaling rate is given by where m is the number of parallel channels, ni is the number of significant conditions of the modulation in the i-th channel, and Ti is the unit interval, expressed in seconds, for the i-th channel.
- For serial transmission in a single channel, the DSR reduces to (1/T)log2n; with a two-condition modulation, i. e. n = 2, the DSR is 1/T.
- For parallel transmission with equal unit intervals and equal numbers of significant conditions on each channel, the DSR is (m/T)log2 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 log2ni in the above summation formula should be deleted when calculating bauds.
- 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.
Based upon Federal Standard 1037C.
Transmission Data Rate Terminology:
Data Rate | Abbreviation | Lower | Upper |
---|---|---|---|
Extremely Low Data Rate | ELDR | 300 bps | 3 kbps |
Very Low Data Rate | VLDR | 3 kbps | 30 kbps |
Low Data Rate | LDR | 30 kbps | 300 kbps |
Medium Data Rate | MDR | 300 kbps | 3 Mbps |
High Data Rate | HDR | 3 Mbps | 30 Mbps |
Very High Data Rate | VHDR | 30 Mbps | 300 Mbps |
Ultra High Data Rate | UHDR | 300 Mbps | 3 Gbps |
Super High Data Rate | SHDR | 3 Gbps | 30 Gbps |
Extremely High Data Rate | EHDR | 30 Gbps | 300 Gbps |
Based upon proposal from davisnetworks.com. 1 Mbps is defined as 1,000,000 bits per second signal data rate (OSI Layer 1).
See also: bit rate, transfer rate.