- 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, 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)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.
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, Ti is the minimum interval between significant instants for the I-th channel, and ni is the number of significant conditions of modulation for the I-th channel.
Transmission Data Rate Terminology
|Extremely Low Data Rate||ELDR||3 bit/s||30 bit/s|
|Super Low Data Rate||SLDR||30 bit/s||300 bit/s|
|Ultra Low Data Rate||ULDR||300 bit/s||3 kbit/s|
|Very Low Data Rate||VLDR||3 kbit/s||30 kbit/s|
|Low Data Rate||LDR||30 kbit/s||300 kbit/s|
|Medium Data Rate||MDR||300 kbit/s||3 Mbit/s|
|High Data Rate||HDR||3 Mbit/s||30 Mbit/s|
|Very High Data Rate||VHDR||30 Mbit/s||300 Mbit/s|
|Ultra High Data Rate||UHDR||300 Mbit/s||3 Gbit/s|
|Super High Data Rate||SHDR||3 Gbit/s||30 Gbit/s|
|Extremely High Data Rate||EHDR||30 Gbit/s||300 Gbit/s|
Based upon proposal from davisnetworks.com. 1 Mbit/s is defined as 1,000,000 bits per second signal data rate (OSI Layer 1).
Data Rate and Standard
|1063 Mbit/s||Fibre Channel|
|2125 Mbit/s||2xFibre Channel|
|2500 Mbit/s||2xGbE, infiniband|
|3125 Mbit/s||10 DbE LX-4|
|4250 Mbit/s||4xFibre Channel|
|10.3125 Gbit/s||10 GbE|
|10.51875 Gbit/s||10 G Fibre Channel|
|10.664 Gbit/s||OC-192 (FEC)|
|10.709 Gbit/s||OC-192 (ITU-T G.709)|
|11.100 Gbit/s||10 GbE FEC|
|11.300 Gbit/s||10 G Fibre Channel|