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Table 4 802.15.4 timings for a data rate of 250 kbps with IAWA.

From: Coexistence Mechanism for Colocated HDR/LDR WPANs Air Interfaces

Timings Symbols Duration Size
SFDHDR 7860 122.88 ms 30720 bit
  SADLDR 960 15.36 ms 3840 bit
  Time Slot 60 0.96 ms 240 bit
  Max. CFP 520 8.32 ms 8 slot
Duty Cycle = 12.5%
SFDHDR 15360 245.76 ms 61440 bit
  SADLDR 960 15.36 ms 3840 bit
  Time Slot 60 0.96 ms 240 bit
  Max. CFP 520 8.32 ms 8 slot
Duty Cycle = 6.25%
SFDHDR 30720 491.52 ms 122880 bit
  SADLDR 960 15.36 ms 3840 bit
  Time Slot 60 0.96 ms 240 bit
  Max. CFP 1480 23.68 ms 12 slot
Duty Cycle = 3.125%