See 2056 Radio Channel Table and 2055 Radio Channel Table for tables and description

u8 N PHY Get Channel Frequency Range (int channel)

1. If the band is 2G
   1. Return 0
2. If channel is zero
   1. Get current channel from wherever it is available

3. If PHY Revision < 3

   1. Set channel_ptr to 2055 Radio Channel Table

   2. Set len to length of that table
4. Else if PHY Revision is 3

   1. Set channel_ptr to PHY Revision 3 Table

   2. Set len to length of that table
5. Else if PHY Revision is 4

   1. Set channel_ptr to PHY Revision 4 Table

   2. Set len to length of that table
6. Else if Radio Revision is 5

   1. Set channel_ptr to PHY Revision 5 Table

   2. Set len to length of that table
7. Else if Radio Revision is 6

   1. Set channel_ptr to PHY Revision 6 Table

   2. Set len to length of that table
8. Else if Radio Revision is 7 or 9

   1. Set channel_ptr to PHY Revision 7 or 9 Table

   2. Set len to length of that table
9. Else if Radio Revision is 8

   1. Set channel_ptr to PHY Revision 8 Table

   2. Set len to length of that table
10. Otherwise
    1. Return 0
11. Loop len times with i as index
    1. If the channel entry in the table equals channel
       1. Break

    2. If i >= len

       1. Return 0
    3. Set freq to the frequency value from the table

12. If (freq >= 4900) and (freq < 5100)

    1. Return 1

13. Else if (freq >= 5100) and (freq < 5500)

    1. Return 2
14. Return 3