FCC ID: 2AF6B-RAK2287 LoRa Concentrator Module

Specification for WisLink-LoRa Gateway Module Mini-PCIe Edition RAK2287 SPI/USB Version V1.2 | February 2020 RAK2287 Table of Contents 1 Overview .................................................................................................................................... 3 1.1 Introduction ......................................................................................................................... 3 1.2 Main Features ..................................................................................................................... 3 1.3 Package Contents ............................................................................................................... 4 2 WisLink LoRa Module RAK2287 .............................................................................................. 4 2.1 Overview ............................................................................................................................. 4 2.2 Block Diagram ..................................................................................................................... 5 2.3 Operating Frequencies ....................................................................................................... 5 2.4 Pin Definition ....................................................................................................................... 5 2.5 Power Supply ...................................................................................................................... 8 2.6 SPI Interface ....................................................................................................................... 8 2.7 USB Interface ...................................................................................................................... 8 2.8 UART and I2C interface ...................................................................................................... 8 2.9 RESET ................................................................................................................................ 9 2.10 Antenna RF Interface .......................................................................................................... 9 2.11 Electrical Characteristics ..................................................................................................... 9 2.11.1 Absolute Maximum Rating ....................................................................................... 9 2.11.2 Maximum ESD ....................................................................................................... 10 2.11.3 Operating Conditions ............................................................................................. 10 2.11.4 Power Consumption .............................................................................................. 11 2.11.5 RF Characteristics ................................................................................................. 11 1 3 Schematics Reference ............................................................................................................ 11 4 Contact Information ................................................................................................................ 12 5 Warning .................................................................................................................................... 12 6 Revision History ...................................................................................................................... 15 7 Document Summary ............................................................................................................... 15 1 RAK2287 List of Tables Table 2 | Operating Frequencies .................................................................................................... 5 Table 3 | Definition of I/O Parameters ............................................................................................. 6 Table 4 | Absolute Maximum Ratings ........................................................................................... 10 Table 5 | Maximum ESD Ratings .................................................................................................. 10 Table 6 | Operation Temperature Range ...................................................................................... 10 Table 7 | PowerSupply Range ...................................................................................................... 11 Table 8 | Power Consumption ....................................................................................................... 11 Table 9 | LoRa RF Characteristics ................................................................................................ 11 List of Figures Figure 1 | RAK2287 board ............................................................................................................. 4 Figure 2 | Module Overview ............................................................................................................ 4 Figure 3 | RAK2287Block Diagram ................................................................................................. 5 Figure 8 | RAK2287Card Minimum Schematic Reference ........................................................... 12 s e g a m I d n a s e b a T l f o t s L i s e g a m I d n a s e b a T l f o t s L i 2 2 RAK2287 1 Overview 1.1 Introduction RAK2287 is a LoRa concentrator card with mini-PCIe form factor based on SX1302, which enables an easy integration into an existing router or other network equipment with LoRa Gateway capabilities. It can be used in any embedded platform offering a free mini-PCIe slot with SPI or USB connection. Furthermore, ZOE-M8Q GPS chip is integrated on board. RAK2287 is a complete and cost efficient LoRa gateway solution offering up to 10 programmable parallel demodulation paths which are 8xSF5-SF12 LoRa demodulators, 8xSF5-SF10 LoRa demodulators, 500 kHz LoRa demodulator and (G)FSK demodulator. It can detect at any time, any packet in a combination of 8 different spreading factors(SF5 to SF12) and 10 channels, and demodulate up to 16 packets at any time. It targets smart metering fixed networks and Internet-of-Things (IoT) applications, covering up to 500 nodes per square kilometer in an environment with moderate interference. Another feature is the integration of Ublox GPS module which expands applications. 1.2 Main Features 3 Compatible with Mini PCI-e Edition specification with heat sink. SX1302 base band processor emulates 8 x8 channel LoRa packet detectors, 8 x SF5-SF12 LoRa demodulators, 8 x SF5-SF10 LoRa demodulators, one 125 /250 /

500 kHz high-speed LoRa

. Built-in STM32L412K to convert SPI interface of SX1302 to USB2.0. demodulator and one (G)FSK demodulator Voltage of Mini PCI-e is 3.3 V, compatible with 3G/LTE card of Mini PCI-e type. Tx power up to 13.39dBm, Rx sensitivity down to -139dBm@SF12, BW 125 kHz. Supports latest LoRaWAN 1.0.2 protocol. Supports global license-free frequency band (US915). Supports optional SPI or USB interfaces. Built-in ZOE-M8Q GPS module 3 1.3 Package Contents RAK2287 Figure 1 | RAK2287 board 2 WisLink LoRa Module RAK2287 2.1 Overview The board only weighs 9.7 grams, its length is 50.95 mm while its width is 30 mm. The board width, top-side and bottom-side keep-out areas and all other dimension is 4 defined by PCI Express Mini Card Electromechanical Specification except for the card thickness (nominal value of 3.7 mm). Figure 2 | Module Overview 4 RAK2287 2.2 Block Diagram RAK2287 card integrates one ZOE-M8Q, one SX1302 chip and two SX1250 chips which represent the core of the device. This provides the related LoRa modem and processing functionalities. Additional signal conditioning circuitry is implemented for PCI Express Mini Card compliance, and two UFL connectors are available for external antennas integration. Figure 3 | RAK2287Block Diagram 5 2.3 Operating Frequencies The board supports the following LoRaWAN frequency channels, allowing easy configuration while building the firmware from the source code. Region Freq. ( MHz ) North America US915 Table 1 | Operating Frequencies Note: The above frequency band parameters changes in difference region to compliance with the local regulatory requirements, contract Rakwireless for detail. 2.4 Pin Definition The following tables show the pin definition and description of RAK2287 on the 52-

pin application. 5 RAK2287 Type IO DI DO OC OD PI PO NC 3.3Vaux 3V3 GND GND UIM_PWR NC UIM_DATA NC UIM_CLK NC UIM_RESET NC UIM_VPP RESERVED NC NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Description Bidirectional Digital input Digital output Open collector Open drain Power input Power output No Connection No Connection by default 3.3V DC supply No Connection by default Ground No Connection by default No Connection by default No Connection No Connection No Connection by default No Connection No Connection by default No Connection No Connection No Connection PI IO IO IO DI Table 2 | Definition of I/O Parameters Pin #

Mini PCIe PIN Rev. 2.0 RAK2287 PIN Description Remarks WAKE#

SX1261_BUSY DO Reserved for future applications. COEX1 SX1261_DIO1 Reserved for future applications. 6 COEX2 SX1261_DIO2 Reserved for future applications. 1.5V GPIO(6) Connect to SX1302s GPIO[6]. CLKREQ#

SX1261_NSS Reserved for future applications. GND GND Ground REFCLK-

SX1261_NRESET DI Reserved for future applications. REFCLK+

MCU_NRESET DI Reserved for future applications. GND GND Ground GND GND Ground RESERVED PPS DO Time pulse output Leave open if not used. 6 20 21 22 23 24 26 27 28 29 30 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 RAK2287 W_DISABLE#

NC No Connection GND GND Ground PERST#

SX1302_RESET SX1302 reset input Active high, 100ns for SX1302 reset. PERn0 RESET_GPS Active low, Leave open if not used. 25 PERp0 STANDBY_GPS DI Active low, Leave open if not used. DI DI PI IO DI IO IO IO PI GPS module ZOE-

M8Q reset inputs 3.3V DC supply GPS module ZOE-

M8Q external interrupt input Ground Ground No Connection Ground HOST SCL Ground Ground USB differential data (-) Ground USB differential data (+) 3.3V DC supply Ground 3.3Vaux 3V3 GND GND 1.5V GND GND GND NC GND SMB_CLK I2C_SCL GND GND GND GND GND GND 3.3Vaux GND 3.3Vaux 3V3 GND 3V3 31 PETn0 PI_UART_TX HOST UART_TX 32 SMB_DATA I2C_SDA HOST SDA 33 PETp0 PI_UART_RX DO HOST UART_RX Connect to GPS module ZOE-M8Qs SCL internally. Leave open if not used. Connect to GPS module ZOE-M8Qs UART_RX internally. Leave open if not used. Connect to GPS module ZOE-M8Qs SDA internally. Leave open if not used. Connect to GPS module ZOE-M8Qs UART_TX internally. Leave open if not used. 7 USB_D-

USB_DM Require differential impedance of 90. USB_D+

USB_DP Require differential impedance of 90. PI 3.3V DC supply LED_WWAN#

NC No Connection GND GND Ground LED_WLAN#

NC No Connection RESERVED HOST_SCK I/O Host SPI CLK LED_WPAN#

NC No Connection RESERVED HOST _MISO I/O Host SPI MISO 1.5V NC No Connection 7 RAK2287 49 50 51 52 RESERVED HOST _MOSI I/O Host SPI MOSI GND GND Ground RESERVED HOST _CSN Host SPI CS 3.3Vaux 3V3 3.3V DC supply I/O PI Table 4 | Pin Definitions RAK2287 card must be supplied through the 3.3Vaux pins by a DC power supply and 2.5 Power Supply the voltage must be stable. 2.6 SPI Interface SPI interface is provided on the Host_SCK, Host _MISO, Host _MOSI, Host _CSN pins of the system connector. The SPI interface gives access to the configuration register of SX1302 via a synchronous full-duplex protocol. Only the slave side is implemented. 8 2.7 USB Interface RAK2287 card can support the high speed USB to SPI by STM32L412Kx, it includes a USB 2.0 compliant interface with maximum 480 Mb/s data rate, representing the interface for any communication with an external host application processor. The module itself acts as a USB device and can be connected to any USB host equipped with compatible drivers. Note: RAK2287-SPI version don't have this interface. 2.8 UART and I2C interface RAK2287 integrates ZOE-M8Q GPS module which has UART and I2C interface. The PINs on golden finger provide an UART connection and an I2C connection, which allows direct access to the GPS module. The PPS signal is not only connected to SX1302 internally, but also connected to golden finger which can be used by host board. 8 RAK2287 2.9 RESET RAK2287 card includes the RESET active-high input signal to reset the radio operations as specified by the SX1302 Specification. 2.10 Antenna RF Interface The modules have two RF interfaces over standard UFL connector (Hirose U. FL-R-

SMT) with the characteristic impedance of 50. Port (J1) is the LoRa antenna interface and Port (J2) is the GPS antenna interface. 2.11 Electrical Characteristics Stressing the device above one or more of the ratings listed in the Absolute Maximum Rating section may cause permanent damage. These are stress ratings only. Operating the module at these or at any conditions other than those specified in the Operating Conditions sections of the specification should be avoided. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. The operating condition range define those limit within which the functionality of the 9 device is guaranteed. Where application information is given, it is advisory only and does not form part of the specification. 2.11.1 Absolute Maximum Rating Limiting values given below are in accordance with the Absolute Maximum Rating System (IEC 134). Symbol Description Condition Min. Max. 3.3Vaux Module supply voltage Input DC voltage at 3.3Vaux pins 0.3V 3.6V USB USB D+/D- pins Input DC voltage at USB interface pins 3.6V RESET SPI PPS SX1302 reset input Input DC voltage at RESET input pin 0.3V 3.6V SPI interface 0.3V 3.6V Input DC voltage at SPI interface pin Output DC voltage at PPS output pin GPS pps output 0.3V 3.6V Rho_ANT Antenna ruggedness Output RF load mismatch ruggedness at ANT1 10:1VSW R 9 RAK2287 Tstg Storage Temperature 40C 85C Table 3 | Absolute Maximum Ratings The product is not protected against overvoltage or reversed voltages. If necessary, voltage spikes exceeding the power supply voltage specification, given in table above, must be limited to values within the specified boundaries by using appropriate protection devices. 2.11.2 Maximum ESD The table below lists the maximum ESD. Parameter Min Typical Max Remarks ESD_HBM ESD_CDM 1000V 300V Charged Device Model JESD22-C101 CLASS III Charged Device Model JESD22-C101 CLASS III Table 4 | Maximum ESD Ratings 10 ESD HANDLING: Although this module is designed to be as robust as possible, electrostatic discharge (ESD) can damage this module. This module must be protected at all times from ESD when handling or transporting. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD handling precautions should be used at all times. 2.11.3 Operating Conditions The table below lists the operation temperature range. Parameter Min. Typical Max. Remarks Normal operating temperature 40C

+25C

+85C Normal operating temperature range Table 5 | Operation Temperature Range Note: unless otherwise indicated, all operating condition specifications are at an ambient temperature of 25C. Operation beyond the operating conditions is not recommended and extended exposure beyond them may affect device reliability. 10 RAK2287 The table below lists the power supply range. Input voltage at 3.3Vaux must be above the normal operating range minimum limit to switch-on the module. Symbol Parameter Min. Typical Max. 3.3Vaux Module supply operating input voltage 3.0 V 3.3 V 3.6 V Table 6 | PowerSupply Range 2.11.4 Power Consumption Mode Condition Min AVG Max Active-

Mode(TX) Active-

Mode(RX ) The power of TX channel is 13.39dBm and 3.3V supply. 511mA 512mA 513mA TX disabled and RX enabled. 70mA 81.6 mA 101 mA Table 7 | Power Consumption 2.11.5 RF Characteristics 11 The following table gives typically sensitivity level of the RAK2287 card. Signal Bandwidth/[KHz]

Spreading Factor Sensitivity

/[dBm]

500 500 12 7

-133

-120 Table 8 | LoRa RF Characteristics Note: The above parameters changes in difference region to compliance with the local regulatory requirements, contract Rakwireless for detail. 3 Schematics Reference RAK2287 card refers to Semtech's reference design of SX1302. The SPI interface or USB interface converts SPI to USB2.0 by STM32L412Kx, and can be used on PCIE connector. The next figure shows the minimum application schematic of RAK2287 card. You should use it at least 3.3V/1A DC power, connect SPI interface or USB interface to the main processor. 11 RAK2287 12 12 Figure 4 | RAK2287Card Minimum Schematic Reference 4 Contact Information Document Center: https://doc.rakwireless.com/

Resource Downloads: https://downloads.rakwireless.com.cn/cn/

Forum Supports: https://forum.rakwireless.com/

Email: info@rakwireless.com 5 Warning FCC Warning 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;

RAK2287

(2) This device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. INTEGRATION INSTRUCTIONS 1. This module has been tested and found to comply with the FCC Part15.247 for Modular Approval. 2. This Modular Approval is limited to OEM installation for mobile and fixed applications only. The antenna installation and operating configurations of this transmitter, including any applicable source-based time- averaging duty factor, antenna gain and cable loss must satisfy MPE categorical Exclusion Requirements of 2.1091. This modular should be installed and operated with minimum distance 20 cm between the radiator& your body. 3. The U.FL connector antenna has been approved for the modular. The maximum antenna gain is 3dBi. For situations where the host manufacturer is responsible for an external connector, the integration instructions shall inform the installer that a unique antenna connector must be used on the Part 15 authorized transmitters used in the host product. 4. When the module is installed in the host device, the FCC ID label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily removed. If not, a second label must be placed on the outside of the final device that contains the following text: Contains FCC ID: 2AF6B-RAK2287. 13 5. The Shenzhen Rakwireless Technology Co., Ltd. uses various test mode programs for test set up which operate separate from production firmware. Host integrators should contact Shenzhen Rakwireless Technology Co., Ltd. for assistance with test modes needed for module/host compliance test requirements. 6. The Shenzhen Rakwireless Technology Co., Ltd. modular transmitter is only FCC authorized for the FCC Part15.247 listed on the grant, and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-

radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. ISED Warning:

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions:

13 RAK2287 1. This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation of the device. Lmetteur/rcepteur exempt de licence contenu dans le prsent appareil est conforme aux CNR dInnovation, Sciences et Dveloppement conomique Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes :

1. Lappareil ne doit pas produire de brouillage;

2. Lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter located or operating in conjunction with any other antenna or transmitter. Cet quipement est conforme avec les limites dexposition la radiation de lISED mises dans un environnement contrl. Cet quipement devrait tre install et fonctionnel avec un minimum de distance entre le radiateur et votre corps dau moins 20 cm. Ce transmetteur ne doit pas tre co-situ prs dune autre antenne ou en conjonction avec un autre transmetteur. 14 The host product shall be properly labelled to identify the modules within the host product. The ISED certification label of a module shall be clearly visible at all times when installed in the host product; otherwise, the host product must be labelled to display the ISED certification number for the module, preceded by the word "contains"

or similar wording expressing the same meaning, as follows:

Contains IC: 25908-RAK2287 Le numro d'homologation d'ISDE, le NIVM, le NMP et le NIVL ne doivent pas ncessairement tre adjacents. Le numro d'homologation se compose d'un numro de compagnie (NC), attribu par le Bureau d'homologation et de services techniques dISDE, suivi du numro de produit unique (NPU) attribu par le requrant. Le numro d'homologation doit apparatre comme suit : IC: 25908-RAK2287 14 6 Revision History Revision Description Initial version 1.0 1.1 1.2 Modify the figures, add the source code chapter 2019-01-02 Rectify mistakes 2020-02-26 RAK2287 Date 2018-12-21 7 Document Summary Prepared by Checked by:

Approved by:

Jeff Penn 15 About RAKwireless:

RAKwireless is a pioneer in providing innovative and diverse Cellular and LoRaWAN connectivity solutions for both Edge and Gateway IoT devices. We believe that through easy to use and modular designs we can accelerate the time to market for various IoT Applications in order to optimize system deployment in both Developer and Commercial settings. 15

EXHIBIT A - FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

Shenzhen RAKwireless Technology Co., Ltd. Address: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China Email: ye.duiyu@rakwireless.com Tel: +8675586152201 FCC Authorization 2020-03-04 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

We (Shenzhen RAKwireless Technology Co., Ltd.), the undersigned, hereby authorize Bay Area Compliance Laboratories Corporation to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratory Corporation on our behalf shall have the same effect as our own action. We, 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. 862. This authorization is valid until further written notice from the applicant. Sincerely, Signature:

Ye Duiyu Title: Engineer QA-FR-170-B

Shenzhen Rakwireless Technology Co., Ltd. Add: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town,Nanshan District, Shenzhen, China Tel: +86-755-86108311 Fax: +86-755-86108311 Email: ye.duiyu@rakwireless.com Date: 2020-03-03 To:

FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attestation letter Dear Sir/Madam, We, Shenzhen Rakwireless Technology Co., Ltd., have the product: LoRa Concentrator Module, model: RAK2287, FCC ID: 2AF6B-RAK2287. The Lora chip, model: SX1302, installed in the product can support 125 kHz, 250 kHz and 500 kHz bandwidth, for marketing purpose, this chip will not support/enable the 125 kHz, 250 kHz bandwidth in US, for it has been shield by the manufacturer using the software. The transceiver chip, model: SX1250, installed in the product can support 150-960MHz frequency range, for marketing purpose, this chip will not support/enable frequencies other than 923.3-927.5MHz in US, for it has been shield by the manufacturer using the software. Sincerely, Signature:

Duiyu Ye Engineer

Shenzhen RAKwireless Technology Co., Ltd. Address: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China Email: ye.duiyu@rakwireless.com Tel: +8675586152201 FCC Confidential Authorization 2020-03-04 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AF6B-RAK2287 In accordance with Sections 0.457 and 0.459 of the Commissions Rules, (Shenzhen RAKwireless Technology Co., Ltd. ) hereby requests long-term confidential treatment of information accompanying this application as outlined below:

Block Diagram Schematics Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature:

Ye Duiyu Title: Engineer

Shenzhen Rakwireless Technology Co., Ltd. Add: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town,Nanshan District, Shenzhen, China Tel: +86-755-86108311 Fax: +86-755-86108311 Email: ye.duiyu@rakwireless.com Modular Approval Letter Date: 2020-03-03 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Application Examiner, We, Shenzhen Rakwireless Technology Co., Ltd. , is submitting this application for certification of product named as LoRa Concentrator Module, Model Numbers:

RAK2287(FCC ID: 2AF6B-RAK2287). It is seeking modular approval. The radio meets the requirements for modular approval as detailed in FCC 15.212. Compliance to each of the requirements is described below:

1. The modular transmitter must have its own RF shielding. Yes, it is fulfilled. The radio portion of the module has its own RF shielding. The shielding is installed at the factory. Please see the EUT photos. 2. The modular transmitter must have buffered modulation/data inputs. Yes, it is fulfilled. The EUT has buffered data inputs to insure compliance with Part 15 requirements under conditions of excessive data rates or over modulation. Please see the Schematics exhibit. 3. The modular transmitter must have its own power supply regulation. Yes, it is fulfilled. The EUT has its own power supply regulation to insure compliance. 4. The modular transmitter must comply with the antenna requirements of Section 15.203 and 15.204(c). Yes. The EUT has an I-PEX connector antenna interface design. 5. The modular transmitter must be tested in a stand-alone configuration. Yes, it is fulfilled. The EUT was tested in a stand-alone configuration. 6. The modular transmitter must be labeled with its own FCC ID number. Yes, it is fulfilled. The module will be labeled with its own FCC ID number. Please see FCC ID label & location exhibit. 7. The modular transmitter must comply with any specific rule or operating requirements applicable to the transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. Yes, it is fulfilled. The necessary explanation to be complied with this requirement is contained in the user manual, and please refer to the User manual. 8. The modular transmitter must comply with any applicable RF exposure requirements. Yes, it is fulfilled. The module will comply with all applicable RF exposure requirements in its intended configuration/integration in a host. Please contact me if you have additional questions. Your attention to this matter is greatly appreciated. Sincerely Yours, Signature:

Duiyu Ye Engineer