In telecommunication, an isochronous signal is a signal in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval. Variations in the time intervals are constrained within specified limits.

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"Isochronous" is a characteristic of one signal, while "synchronous" indicates a relationship between two or more signals.

• Synchronization in telecommunications
• Synchronous network
• Mesochronous network
• Plesiochronous system
• Asynchronous system

 This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22. (in support of MIL-STD-188).

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