FCC ID: 2ABLKGS5229XX GigaSpire BLAST u6t

Calix Inc. 1035 N. McDowell Blvd. Petaluma, California 94954, United States Date: 2024-03-20 FCC ID: 2ABLKGS5229XX A U T H O R I Z A T I O N L E T T E R To Whom It May Concern:

Calix Inc. hereby authorizes Trista Tsai / Specialist of Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch (BV CPS Taoyuan), to act on its behalf in all matters relating to the Federal Communication Commission (FCC) application for equipment authorization in connection with the FCC ID listed above, including signing of all documents relating to these matters. Any and all acts carried out by Trista Tsai / Specialist of BV CPS Taoyuan on Calix Inc.s behalf, within the scope of the powers granted herein, shall have the same effect as acts of its own. If you have any questions regarding the authorization, please dont hesitate to contact us. Sincerely yours,

Alex Mathews/Sr. Compliance Engineer Calix Inc. TEL: 669-288-2945 FAX: 707-283-3155 E-mail: alex.mathews@calix.com

Calix Inc. 1035 N. McDowell Blvd. Petaluma, California 94954, United States DFS device channel plan and software operational declaration Date: 2024-03-20 We, Calix Inc., declare that the device, FCC ID: 2ABLKGS5229XX, Model Name:

u6txg GS5229XG, u6t GS5229E, 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 5 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 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 CH 52 54 56 58 60 62 64 Frequency

(MHz) Scan Type 5260 5270 5280 5290 5300 5310 5320 Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive CH 100 102 104 106 108 110 112 116 118 120 122 Frequency

(MHz) Scan Type 5500 5510 5520 5530 5540 5550 5560 5580 5590 5600 5610 Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive CH 124 126 128 132 134 136 138 140 142 144 Frequency

(MHz) Scan Type 5620 5630 5640 5660 5670 5680 5690 5700 5710 5720 Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive Active Passive 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 Calix Inc. 1035 N. McDowell Blvd. Petaluma, California 94954, United States 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 a special signature and CRC checksum. Signature and CRC checksum will be calculated and verified before firmware upgrade. Unauthorized modification to firmware will lead to the failure of verification and thus firmware upgrade will not be allowed. Sincerely yours,

Alex Mathews/Sr. Compliance Engineer Calix Inc. TEL: 669-288-2945 FAX: 707-283-3155 E-mail: alex.mathews@calix.com

Calix Inc. 1035 N. McDowell Blvd. Petaluma, California 94954, United States Date: 2024-01-12 FCC ID: 2ABLKGS5229XX To the attention of Federal Communications Commission Authorization and Evaluation Division Attestation Statements Attestation Statements Part 2.911(d)(5)(i) Filing Calix Inc. certifies that the equipment for which authorization is sought is not covered equipment prohibited from receivingan equipment authorization pursuant to section 2.903 of the FCC rules. Attestation Statements Part 2.911(d)(5)(ii) Filing Calix Inc. certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing covered equipment. Sincerely yours,

Alex Mathews / Sr. Compliance Engineer Calix Inc. TEL: 669-288-2945 FAX: 707-283-3155 E-mail: alex.mathews@@calix.com

FCC ID: 2ABLKGS5229XX Description of Permissive Change The application is prepared for FCC class II permissive change. The differences with the original application are:

1. Adding DFS band (5260 ~ 5320 MHz, 5500 ~ 5720 MHz) via software, and 2. Adding 2nd souce combination as below:

. Both devices, original and updated versions, are electrically identical in all aspects except the abovementioned. Regards, Trista Tsai / Specialist Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch Tel: 886-3-318 3232 ext. 4311812 Fax: 886-3-327 0892 Email: trista.tsai@bureauveritas.com Data: 2024-04-01

Calix Inc. 1035 N. McDowell Blvd. Petaluma, California 94954, United States Date: 2024-03-20 FCC ID: 2ABLKGS5229XX To the attention of Federal Communications Commission Authorization and Evaluation Division Permanent Confidentiality Request According to Sections 0.457 and 0.459 of the Commissions Rules, the Applicant hereby requests confidential treatment of information accompanying this Application as outlined below:

Operational Description Software Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457, disclosure of this Application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely yours,

Alex Mathews/Sr. Compliance Engineer Calix Inc. TEL: 669-288-2945 FAX: 707-283-3155 E-mail: alex.mathews@calix.com

Calix Inc. 1035 N. McDowell Blvd. Petaluma, California 94954, United States Date: 2024-03-20 FCC ID: 2ABLKGS5229XX To the attention of Federal Communications Commission Authorization and Evaluation Division Confidentiality Request According to Sections 0.457 and 0.459 of the commissions rules, we request short-term confidential treatment for the following information until 180 days after the Grant Date of Equipment Authorization to ensure sensitive business information remains confidential until the actual marketing of the device:

Test Setup photos Internal Photos Sincerely yours,

Alex Mathews/Sr. Compliance Engineer Calix Inc. TEL: 669-288-2945 FAX: 707-283-3155 E-mail: alex.mathews@calix.com