clarify when teh slotframe lenght is not 10ms, how this is advertised.

[Xavier Vilajosana]

5. The text RECOMMENDS a default slot duration of 10ms. I don't see a slot duration in the accompanying figure. What if an implementation chooses a different duration?

TW> In that case, the EB would contain that slot duration explicitly (through TW> a set of fields called "TSCH Timeslot" payload IE). TW> You comment shows this isn't clear. TW> @Editor, can you propose an extra sentence to make this clear?

[Xavier Vilajosana]

I think this is already clear in the text

Other time slot durations MAY be supported and MUST be announced in the EBs. If one uses a timeslot duration different than 10ms, EBs MUST contain the complete TimeSlot IE as described in <xref target="sec_tstiming"/>. Nodes not supporting the default timeslot value SHOULD be clearly indicated.