Attestation (DFS Client Declaration) rev

FCC ID: RYK-WUBT236ACNBT

Attestation Statements

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FCCID_4154859

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           DFS client device channel plan and software operational declaration

 Date: 2019—01—31
 We, the undersigned, declare that the device, RYK—WUBT236ACNBT, does not have
 "Ad Hoc on non—US frequencies" and/or "on DFS frequencies. Also, the client software and
 associated drivers will not initiate any transmission on DFS frequencies without initiation by a
 master. This includes restriction on transmissions for beacons and support for ad—hoc peer—to—
 peer modes.

 Below is the channel / frequency plan for the device
      CH            1       2       3      4        3       6       7       8       9      10      11
Frequency (MHz)| 2412     2417    2422    2427    2432    2437    2442    2447    2452    2457    2462
   Scan Type     Active ‘Active ‘Active ‘Active ‘Active ‘Active ‘Active ‘Active ‘Active ‘Active ‘Active
  5G band 1
      CH                   36                   38    40     42     44     46     48
Frequency (MHz) 5180                          5190    5200   5210   5220   5230   5240
   Scan Type            Active ‘Active ‘Active ‘Active ‘Active Active Active
 5G band 2
      CH                   52                   54     56     58     60     62     64
Frequency (MHz) 5260                          5270    5280   5290   5300   5310   5320
   Scan Type            Passive |Passive|Passive Passive Passive Passive Passive
 5G band 3
      CH                  100                  102     104    106    108    110    112    116    118    120    122
Frequency (MHz)          5500                 5510    5520   5530   5540   5550   5560   5580   5590   5600   5610
   Scan Type            Passive Passive Passive Passive Passive Passive Passive Passive Passive Passive Passive
      CH                  124                 126     128    132    134    136    140
Frequency (MHz)| 5620                         5630    5640   5660   5670   5680   5700
  Scan Type             Passive Passive Passive Passive Passive Passive Passive
 5G band 4
      CH                  149                  151     153    155    157    159    161    165
Frequency (MHz)          5745                 5755    5765   5775   5785   5795   5805   5825
   Scan Type            Active ‘Active ‘Active ‘Active ‘Active ‘Active ‘Active ‘Active

 Also, on DFS channels, the WLAN driver in the device operates under the control of an AP at all
 times, except when in ad—hoc mode, on US non—DFS channels. The device passively scans DFS
 frequencies until a master device is detected. The control of this functionality is not accessible
 to anyone under any conditions. Furthermore, the firmware is protected by special signature
 and CRC checksum. Signature and CRC checksum will be calculated and verified before
 firmware upgrade. Unauthorized modification to firmware will lead the failure of verification
 thus firmware upgrade is not allowed.

 Sincerely yours,




 Grady Lin /R&D Manager
 SparkLAN Communications, Inc.
 Tel: 02—2659—1880
 Fax: 02—2659—5538
 E—mail: grady.lin@sparklan.com



Document Created: 2019-01-30 21:56:12
Document Modified: 2019-01-30 21:56:12

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