Responses to engineers questions

FCC ID: KA2AP1522B1

Cover Letter(s)

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FCCID_1671544

Office of Engineering and Technology

To: Michael Boschma,
MBoschma@dlink.com
From: Stan Lyles
Stanley.Lyles@fcc.gov

Re: FCC ID: KA2AP1522B1

Applicant: D Link Corporation
Correspondence Reference
40658
Number:
Form 731 Confirmation Number: EA303059
Date of Original E-mail: 11/29/2011

1) Does this device meet the requirements for operation in the 5400 5725 MHz band
specified in KDB 443999?

<D-Link Answer> Yes.

2) Is this an indoor device, outdoor device, or multi-use device? A multi-use device can
operate in both indoor and outdoor configurations; such device will have to meet all the
requirements for outdoor device.

<D-Link Answer> It’s indoor only.

3) Verify that the 5600 5650 MHz band is notched. The test report should include 20
dB BW plots for the 5600 and 5650 MHz band edges and an attestation statement that
the device does not transmit in the notched band.

<D-Link Answer> Yes, the 5600-5650 MHz band is notched.

4) Verify that this application contains a complete User s Manual and/or Professional
Installers Manual. If the manual is not complete, upload an updated User s Manual
exhibit.

<D-Link Answer> Yes, it does.

5) Verify that this device meets the uniform channel spreading requirements on the
remaining (non-notched) channels once the device is in operation.

<D-Link Answer> Yes, it does.

6) Explain how this device meets the Software Configuration Control requirements of
KDB 594280 including country code selection see draft KDB at
(https://fjallfoss.fcc.gov/eas/comments/GetPublishedDocument.html?id=205&tn=511416
). If there is any user permitted configuration control, please explain what controls are
provided to the user and if any will take the device out of compliance; also explain what
prevents the end user from downloading and operating non-US software.

<D-Link Answer> Domain code (country code) is stored in flash during mass
production. There is no user permitted configuration control.

Additional questions for outdoor and multi-use devices:

7) Submit a Letter Exhibit identify the specific expertise and the training required by the
professional installers for installing these types of devices.

<D-Link Answer> N/A. (It’s indoor only.)

8) Explain how this device can meet the 30 MHz frequency separation from TDWR (i.e.:
Manually blocking frequencies by the professional installer, device notches 5470 -5680
MHz, etc.)

<D-Link Answer> N/A. (It’s indoor only.)

9) Does the manual for the installers and operators contain the information on how to
register the device with the voluntary industry data base if operating within 35 km of any
TDWR site location?

<D-Link Answer> N/A. (It’s indoor only.)

1. Per FCC KDB 594280 and CFR 47 rule parts quoted therein, users and any third-
party installers/integrators/dealers/distributors (i.e., anyone one other than the grantee)
are not allowed to modify the software that changes the frequency range, modulation
type, maximum output power, or other radio frequency parameters outside those that
were approved except for compliance purpose and/or through the Class II Permissible
change process. Furthermore, any on-site adjustment of frequency selection
parameters and DFS parameters are specifically prohibited in the KDB.

<D-Link Answer> The frequency range, modulation type, maximum output power are
determined in manufacture. The procedure is protected by user name and password
which won't be exposed to user.

2. Please confirm that the manufacturer control of country code, TX power setting,
channel selection and DFS radar detection enable/disable is through a password
protected web page. There is no alternative way to change conductive power, frequency
table or other RF parameters other than changing the embedded source code which
can only be done by the manufacturer or its contractors at the manufacturer s request.
Attestation is required indicating that no third-party shall have software, or configuration
control, to program the device out of compliance of the technical rules under which the
device has been certified.

<D-Link Answer > The manufacturer control of country code is protected by user name
and password. TX power setting, frequency range and DFS behavior will follow the
country code automatically. The Wi-Fi driver (including DFS behavior) is provided with
type of binary and source code won't be provided to user.

3. What security and control mechanism does the grantee use to ensure that no
unauthorized parties can modify configurations?

<D-Link Answer > It must log in the device with special user name and password in
order to modify country code. The log in procedure won't be exposed to user.

4. Please confirm that company does not currently engage in OEM/ODM sales of
hardware platform and assist in customization and porting of alternative software. If the
company does engage in such sales activities in the future, it will not under any
circumstance alter the DFS channel behavior or provide source code to aid in such
alteration resulting in violation of US regulatory rules.

<D-Link Answer > DAP-1522 B supports multiple countries with single hardware and
firmware. The frequency range and DFS behavior are determined by the country code
which stored in the flash. As describing above the country code is controlled by
manufacture and user is not permitted to modify such information/settings.

The items indicated above must be submitted before processing can continue on the
above referenced application.
Failure to provide the requested information within 60 days of the original e-mail date
may result in application
dismissal and forfeiture of the filing fee pursuant to Section 1.1108

Document Created: 2012-04-05 09:30:14
Document Modified: 2012-04-05 09:30:14

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