Slot 0 is used for sinhronization.
Slot 16 is D channel.
Slots 1-15,17-31 and B channels.

Sasa
CCIE #8635

bergenpeak wrote:
> 
> In Europe, a PRI carries 30B and one D channels.  Each operates at
> 64kb/s.
> The overall PRI bandwidth is 2.048 Mb/s.   31 channels at 64 kb/s
> is 64kbps less than 2.048Mb/s.
> 
> What's the 32nd 64kbps channel used for?
> 
> Thanks




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