FCC ID: 2A4QULT100B Wireless TVWS Fixed Base

www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 FCC Compliance Statement Caution: changes or modifications could void the user's authority to operate the equipment

[FCC 15.21]. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC 15.105 Information to the user [FCC 15.105]:

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. 15.706 Information to the user. This equipment has been tested and found to comply with the rules for white space devices, pursuant to part 15 of the FCC rules. These rules are designed to provide reasonable protection against harmful interference. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

(1) Reorient or relocate the receiving antenna.

(2) Increase the separation between the equipment and receiver.

(3) Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303

(4) Consult the manufacturer, dealer or an experienced radio/TV technician for help. FCC RF Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. Caution: Exposure to Radio Frequency Radiation To comply with FCC RF exposure compliance requirements, for fixed configurations, a separation distance of at least 41cm must be maintained between the antenna of this device and all persons. This device must not be co-located or operating in conjunction with any other antenna or transmitter. FCC Compliance Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Professional Installer To comply with FCC interference protection requirements for TV Band Devices, this equipment should only be installed by a professional installer. www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Wifrost User Manual Wifrost provides an end to end fixed wireless solution using TVWS unlicensed spectrum. We also offer professional support to help ISPs and enterprises to plan, build and operate the TVWS network. The Wifrost solution includes hardware systems and cloud based software to manage the TVWS spectrum and TVWS devices. This Operation manual goes through the detailed steps of setting up the radios and network for delivering broadband services. The network diagram outlines the overview of the wireless network that our systems can set up. Network Diagram Fixed wireless devices include:

1. wEPC (WiFrost EPC) This is a miniPC/NUC, with 2 ethernet interfaces, Eth0 (left) and Eth1 (right). a) AC adapter b) Indoor device that needs to be in a temperature-controlled location c) Typically, 1 wEPC Gateway per tower. This device can support up to 10 Base Stations or upto www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 1000 CPEs 2. Base Station a) The Base Station is an Outdoor Unit, with 2 N-connector for antenna ports, 1 GPS port, and 1 ethernet port b) PoE+ Adapter: 56V @0.536 c) GPS antenna d) Weatherproof/waterproof Boot for Ethernet slot e) One Base Station supports up to 64 CPEs www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 3. Base Station Antenna (dual port, 2x2 MIMO) Install Pictures a) b) All necessary mounting brackets are pre-installed and fit up to 2.5 inches diameter pipe. 4. CPE - Customer Premise Equipment a) PoE adapter included b) SIM card slot and Ethernet slot in the back, physical reset button is in the SIM card slot c) All necessary mounting brackets are pre-installed and fit up to 2.5 inch diameter pipe. www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 d) Spectrum Scan Best Practice 1. TVWS is an unlicensed spectrum band, so scanning the spectrum to understand the quality of the channels is the most important step before connecting the CPEs. 2. Scan the spectrum for 24 hours. 3. After watching the above videos and becoming a WiFrost Cloud NMS expert, :), on the Base Station dashboard page, go to the Channel Scan page. 4. Hit Start Scanning and confirm in the next dialogue box 5. www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 5. After the scan runs for 12 to 24 hours, come to the same/above location and hit Stop Scan to get the Base Station back in Transmit mode. 6. Select the cleanest available channels. Three steps for a successful TVWS connection setup:

1. Connect wEPC eth0 port to the ISP Internet Router 2. Base Station 1. Connect Base Station and Base Station antenna 2. Power up Base Station and connect to the wEPC eth1. Directly wire connection is recommended. A switch can be used to connect the Base to the wEPC as well, if direct connection is not possible. 3. CPE 1. Power up CPE and point towards the Base Station (point away if close than 100 ft to prevent too strong of a signal for indoor/lab testing) 2. Plug in Wi-Fi Router 3. LED Indicator www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 4. WiFrost Cloud 1. After Base Station is provisioned, it will show up on the Dashboard without any user intervention. 2. Click on Details to go to the Base Station page 1. list of device action: reboot, start/stop transmit, turn on/off scan, enable/disable GPS, switch EPC mode 3. Click Scan Mode to collect spectrum scan data 1. after scan mode turned on, Device Status in the to pane will change from Transmitting to Scanning. Scan interval is 7 min 2. Let the radio run in scan mode for 1 hr to up to 24 hours initially to collect good spectrum scan data. If scan is stopped, or devices reboots, the scan mode need to be started again. Please wait 15 mins to start new scan period. 4. After spectrum scan is done, a channel graph like below will show the channel noise www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 5. Go to the Channel Selection page, and select one of more channels that are clean, e.g. Ch 25, 26 , 37 and 38 appear to be the cleanest in the above screenshot. (your exact channels quality and availability will differ). 1. After hitting transmit, the Base will reboot and start transmitting on the set channel(s) 2. Base reboot time is between 4-6 minutes 3. The CPE will connect to the Base Station in 3 to 4 minutes after Base starts to transmit 6. Check CPE light 1. only one flashing green light means CPE is looking for a base to connect 2. four solid green light means CPE connected to the Base 7. Connect a PC to the Wi-Fi router or directly to the CPE to check Internet Connectivity Firmware Upgrade Base (remote upgrade) 1. Go to the very bottom on the tab and the very last tab. Select firmware from the dropdown, and click Update Firmware. 2. www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 3. CPE (local upgrade) 1. Ask WiFrost to provide the latest firmware and upgrade via CPE local GUI 2. Log in CPE local GUI and go to Maintenance - Firmware Upgrade page, choose Reset to Factory Defaults option and file to upgrade 3.

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WiFrost Inc. FCC Label Location The label is located on the GPS-port side of the product. Side of EUT

www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 2.911 (d)(5) Attestation FCC ID: 2A4QULT100B 1. Wifrost inc (the applicant) certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. 2. Wifrost inc (the applicant) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing covered equipment and is not an affiliate or subsidiary of an entity identified on the Covered List. Sincerely yours, Name:

Hanxi Chen Job Title:

CEO Company Name: Wifrost inc.

www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Date: 5/18/2023 UL Verification Services Inc. 47173 Benicia Street Fremont, CA 94538, USA To whom it may concern:

I, the undersigned, hereby authorize UL Verification Services Inc. to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by UL Verification Services Inc. on our behalf shall have the same effect as acts of our own. I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing UL Verification Services Inc. as our representative, we still recognize that we are responsible to:

a) fulfill the requirements for the scope of certification requested, including implementing any appropriate changes requested by UL Verification Services Telecommunications Certification Body (TCB) and / or the FCC;

b) supply any and all information needed for the evaluation of the products for which certification is sought;

c) make claims regarding certification only in respect of the scope for which certification has been granted;

d) not use our product certification in such a manner as to bring the TCB or FCC into disrepute and to not make any statement regarding product certification which the TCB or FCC may consider misleading or unauthorized;

e) discontinue use of all advertising matter that contains any reference thereto and complies with any and all actions required by the FCC upon suspension or cancellation of certification;

f) use certification only to indicate that products are certified in conformity with specified standards;

g) endeavor to ensure that no certificate or report or any part thereof is used in a misleading manner, and any copies of the grants/certificates shall be reproduced in their entirety;

h) comply with the requirements of the TCB and FCC, including the use of marks and label information prescribed for the scope of certification, when making reference to product certification in communication media such as documents, brochure or advertisements;

www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 i) comply with the requirements for certification, supply any information needed for evaluation of products to be certified and, where applicable, make provision for the participation of observers;

j) ensure that products marketed under the scope of the requested certification continue to comply with the certification requirements;

k) provide a sample of a production unit for testing within 30 days of the request should this product be selected as part of either the TCBs or the FCCs market surveillance requirements;

l) keep a record of all complaints relating to products compliance with requirements of relevant standard; make records available to UL or FCC when requested; take appropriate action with respect to such complaints and any deficiencies found in the product that affect compliance with requirements for certification; document the actions taken with respect to complaints and/or deficiencies;

m) inform the TCB immediately of any changes that may affect its ability to comply with the certification requirements. This authorization is valid until further written notice from the applicant. Sincerely Yours, Hanxi Chen CEO Wifrost inc.

www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Date: 5/18/2023 Attn: FCC Office of Engineering and Technology / UL Verification Services TCB Subject: Request for Confidentiality FCC ID: 2A4QULT100B To Whom It May Concern:

Pursuant to the provisions of Sections 0.457 and 0.459 of the Commissions rules (47 CFR 0.457, 0.459), we are requesting the Commission to withhold the following attachments as confidential document from public disclosure indefinitely. Schematic Diagram Block Diagram Theory of Operation Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In additional to above mentioned documents, pursuant to Public Notice DA 04-1705 of the Commissions policy, in order to comply with the marketing regulations in 47 CFR 2.803 and the importation rules in 47 CFR 2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices. We are requesting the commission to grant short-term confidentiality request on the following attachments until 180 days after grant date. External Photos Internal Photos Test Setup Photos User Manual It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Best Regards Hanxi Chen CEO Wifrost inc.

www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Federal Communications Commissions Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 2.911 (d)(7) Agent Designation Attestation FCC ID: 2A4QULT100B FCC FRN: 0031410780 To whom it may concern:

Applicant (grantee) Wifrost inc (the applicant) as required by section 2.911(d)(7), will also serve as the agent for service of process for the above referenced FCC ID. The applicant acknowledges that they will maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the agent information changes. Hanxi Chen Wifrost inc FCC FRN: 0031410780 761 De Soto Dr. Palo Alto CA 94303 hanxi@wifrost.com Sincerely yours, Hanxi Chen Wifrost inc 761 De Soto Dr Palo Alto CA 94303 hanxi@wifrost.com

www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Federal Communications Commission 7435 Oakland Mills Road Columbia MD 21046 Subject:

Professional Installation Declaration FCC ID: 2A4QULT100B To Whom it May Concern:

We, (Applicant) hereby declare that TVWS device Model number LT100B is intended for professional installation. Furthermore;

(1) To qualify for professional installation, please explain why the hardware is not readily available to average consumer. Description: This device is installed at tall tower that require a professional installer to install.

(2) Applicant must ensure device cannot be sold retail to the general public or by mail order. Description: This device is not sold to general public or by mail order. It is sold by the professional channel and integrator to internet operators.

(3) Describe what is unique, sophisticated, complex, or specialized about your equipment which REQUIRES it to be installed by a professional installer?

Description: The unique character for this device is that it needs to install at tall position such as a tower and poles that will require a tower climber. This device comes with an internal GPS that will automatically report the geo-location accurately.

(4) Applicant intended use is generally not for the general public. Description: The intended use of the device is for internet service providers to provide internet service to their local areas. It is not for general public to us the device.

(5) Installation must be controlled. Description: For safety and security, installation is done by trained professional to install the device on tower and connect it to the internet backhaul.

(6) Installed by licensed professionals. (EUT sold to dealer who hire installers) Description: Yes, device will be sold to a dealer or integartor who will hire professional installers to install.

(7) Installation requires special training (special programming, access to keypad, field strength measurements made) Description: Installation generally require a license to climb the tower or pole and do the network programming. If you should have any question(s) regarding the above declaration, please do not hesitate to contact us. www.wifrost.com 761 De Soto Dr Palo Alto, CA 94303 Sincerely, Hanxi Chen CEO 1650 9964624 hanxi@wifrost.com 5/25/2023