IEEE 1394 fully supports both isochronous and asynchronous applications. FireWire is capable of both asynchronous and isochronous transfer methods at once. MOST150 also permits isochronous transfer on the synchronous channel. The schedule is divided into an isochronous phase and an asynchronous phase. The duration of the isochronous and the asynchronous phase can be configured. Data Space, when present, carries application-specific information such as isochronous and asynchronous data streams. Such a cycloidal pendulum is isochronous, regardless of amplitude. Most installed proton therapy systems utilise isochronous cyclotrons. The second approach to the problem of accelerating relativistic particles is the isochronous cyclotron. ANT uses an adaptive isochronous network technology to ensure coexistence with other ANT devices. For this reason, an isochronous cyclotron is also called an "AVF (azimuthal varying field) cyclotron". ANT's adaptive isochronous scheme doesn't require a master clock. Examples of isochronous cyclotrons abound; in fact almost all modern cyclotrons use azimuthally-varying fields. Synchrocyclotrons have not been built since the isochronous cyclotron was developed. Thus, all particles get accelerated in isochronous time intervals.