ITU-T G.8262.1 (Enhanced SyncE) One-Page Summary
- Gordon Muir (Deactivated)
Owned by Gordon Muir (Deactivated)
Title: Timing characteristics of enhanced synchronous equipment slave clocks
Summary
Enhanced Synchronous Equipment Clock performance specification, covering both enhanced synchronous Ethernet Equipment clocks (eEEC) and OTN Equipment Clocks (eOEC)
Performance meets the requirements of 5G mobile cellular systems
Specifies frequency accuracy, noise generation, noise tolerance, noise transfer, phase transients
Operates over most Ethernet interfaces from 100Mbit/s to 100Gbit/s
Status
- Current version: 1st Edition, January 2019
- Download from: http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=13850
Key Contents
- Frequency accuracy (free-run): 4.6 ppm
- Wander Generation (Figures 1 and 2):
- Wander Tolerance (Figure 3):
 
- Wander Transfer: Low pass filter, 1 to 3 Hz
- Jitter Generation (Table 3):
| Interface | Measuring filter | Peak-to-peak amplitude (UI) |
|---|---|---|
| 1G | 2.5kHz to 10MHz | 0.5 |
| 10G | 20kHz to 80MHz | For further study |
| 25G | 20kHz to 200MHz | For further study |
- Jitter Tolerance (Figure 6):
- Holdover (Figure 8):
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