User manual DynaGATE 20-30-xx Automotive Multi-service IoT Edge Gateway Intel Atom, LTE Cat 4/6 Rev.
Trademarks All trademarks, registered trademarks, logos, trade names, products names contained in this document are the property of their respective owners. Intended audience of this document This document is intended for system integrators: skilled persons with a thorough knowledge in linking together, physically or functionally, different computing systems and software applications to operate as a coordinated whole in compliance with the applicable regulations.
DynaGATE 20-30 User manual Rev. 0-7 How to get started HOW TO GET STARTED To get started with the DynaGATE 20-30, follow these steps: 1. Read carefully and understand the instructions and warnings contained in this manual. To lower the risk of personal injury, electric shock, fire, or damage to equipment, observe the instructions and warnings contained in this manual. For more information see: "Safety instructions" on page 9.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 Contents CONTENTS Trademarks Intended audience of this document Revision history 2 2 2 How to get started 3 Contents 5 1 Safety instructions 1.1 Warning messages 1.1.1 Warning messages for harm to persons 1.1.2 Warning messages for damage to property 1.2 Warning: power supply safety 1.3 Caution: product's surfaces may become hot 1.4 Caution: wireless safety 9 9 9 10 10 10 11 2 Consignes de securite 2.1 Messages d’avertissement 2.1.
Contents 7.2.3 FCC restrictions on 5 GHz Wi-Fi usage 7.2.4 ISED Canada compliance 7.2.5 ISED Class B Digital Device Notice 7.2.6 Responsible parties: Canadian Representative contact information 7.2.7 RF Radiation Exposure Statement 7.2.8 Labeling information 7.3 Antennas List 7.4 RoHS 3 compliance 7.5 REACH compliance DynaGATE 20-30 User manual Rev. 0-7 33 34 34 34 35 35 35 36 36 8 Interfaces overview 8.1 Rear Side Interfaces overview 8.2 Front Side Interfaces overview 8.2.1 Service Panel Interfaces 8.
DynaGATE 20-30 User manual Rev. 0-7 9.15 RTC (Real Time Clock) 9.16 TPM 9.17 Watchdog 9.18 Accelerometer and Gyroscope 9.19 Programmable pushbutton Contents 60 60 60 60 60 10 Eurotech Everyware IoT 10.1 Everyware Software Framework (ESF) 10.2 The ESF Web UI 10.3 The ESF Wires application 10.4 Everyware Cloud (EC) 10.5 For more information 61 61 61 62 63 63 11 Mechanical specifications and dimensions 11.1 Product mechanical specifications 11.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 1 1 Safety instructions SAFETY INSTRUCTIONS IMPORTANT: Read carefully and understand the instructions and warnings contained in this document before installing / using the product. Keep this document for future reference. To lower the risk of personal injury, electric shock, fire or damage to equipment, observe the instructions and warnings contained in this document.
1 Safety instructions 1.1.2 DynaGATE 20-30 User manual Rev. 0-7 Warning messages for damage to property To indicate potential risks of damage to the supported product (or to other property), the following message is used: NOTICE Sign (if necessary) 1.
DynaGATE 20-30 User manual Rev. 0-7 1.4 1 Safety instructions Caution: wireless safety CAUTION The antennas used with the product must be installed with care, avoiding any interference with other electronic devices and keeping a distance from persons greater than 20 cm. If these requirements cannot be satisfied, the system integrator has to assess the final product with respect to SAR regulations.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 2 2 Consignes de securite CONSIGNES DE SECURITE IMPORTANT: Lire attentivement et bien respecter les instructions et les avertissements contenus dans ce document avant d'installer / d'utiliser le produit. Conserver ce document pour s'y référer à l'avenir. Pour éviter les risques de blessures, de choc électrique, d'incendie ou de détérioration du matériel, bien suivre les instructions et les avertissements contenus dans ce document.
2 Consignes de securite 2.1.2 DynaGATE 20-30 User manual Rev. 0-7 Messages d’avertissement relatifs aux dommages matériels Pour signaler les risques potentiels de détérioration du produit (ou des produits annexes), le message suivant est utilisé: AVIS Signal (si besoin) 2.
DynaGATE 20-30 User manual Rev. 0-7 2.4 2 Consignes de securite Attention: sécurité sur la connectivité sans fil ATTENTION Les antennes utilisées avec le produit doivent être installées avec soin, en évitant toute interférence avec d'autres appareils électroniques et à au moins 20 cm des personnes. Si ces exigences ne peuvent être satisfaites, l'intégrateur du système doit évaluer le produit final par rapport à la réglementation SAR.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 3 How to receive technical assistance 3 HOW TO RECEIVE TECHNICAL ASSISTANCE 3.1 How to ask for technical support To ask for technical support, complete the following steps 1. Go to the Eurotech Global Support Centre: https://support.eurotech.com/ 2. Submit a support request 3. Wait for the reply from the Eurotech Technical Support with the information you required 3.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 4 Comment obtenir une assistance technique 4 COMMENT OBTENIR UNE ASSISTANCE TECHNIQUE 4.1 Comment contacter le support technique Pour demander un support technique, procéder comme suit: 1. Se connecter au Support Eurotech sur: https://support.eurotech.com/ 2. Envoyer une demande d’assistance 3. Attendre la réponse de l'équipe de support avec les informations requises 4.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 5 CONVENTIONS USED 5.1 Conventions for signal names 5.2 Convention Description GND Ground # Active low signal + Positive signal; Positive signal in differential pair - Negative signal; Negative signal in differential pair 3.3 3.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 6 Product overview 6 PRODUCT OVERVIEW 6.1 Product description The DynaGATE 20-30 is an IoT Edge Gateway, E-Mark certified, that addresses the challenges of the next-generation applications for smart transportation and fleet management. It combines hardware, software and connectivity to bridge the vehicle with leading Cloud services.
6 Product overview 6.2 DynaGATE 20-30 User manual Rev.
DynaGATE 20-30 User manual Rev. 0-7 6.3 6 Product overview Intended use and not allowed uses of the product The product is intended for professional use and must be installed by qualified personnel only. The product must be installed in a secured location, accessible to authorized personnel only (for example in a cabinet / technical compartment). 6.3.
6 Product overview 6.4 DynaGATE 20-30 User manual Rev. 0-7 Technical specifications According to the respective product versions, the specifications are as follows: Specifications Description according to product versions -00 -10/-30(*) -11/-31(*) Intel Atom x5 - E3940, 1.60GHz (1.80GHz), Quad Core -20/-40(*) -21/-41(*) -22/-42(*) PROCESSOR CPU Intel Atom x5E3930, 1.30GHz (1.80GHz), Dual Core Intel Atom x7 - E3950, 1.60GHz (2.
DynaGATE 20-30 User manual Rev.
6 Product overview DynaGATE 20-30 User manual Rev.
DynaGATE 20-30 User manual Rev. 0-7 7 7 Regulatory information REGULATORY INFORMATION This section provides regulatory information for the DynaGATE 20-30 (hereafter referred to as "this "product"). Upon request, Eurotech can provide the product Declaration of Conformity. For details and more information contact the Eurotech Technical Support (see "How to receive technical assistance" on page 17). 7.1 CE compliance 7.1.
7 Regulatory information 7.1.6 DynaGATE 20-30 User manual Rev. 0-7 RED 2014/53/EU compliance Some versions of this product meet the requirements of the Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the harmonization of the laws of the Member States relating to the making available on the market of radio equipment. For more information see "Technical specifications" on page 26.
DynaGATE 20-30 User manual Rev. 0-7 7.1.6.
7 Regulatory information 7.2 FCC/ISED compliance 7.2.1 FCC marking DynaGATE 20-30 User manual Rev. 0-7 Some versions of this product are FCC marked (for more information see "Technical specifications" on page 26). They comply with the regulatory information reported in the following sections. Eurotech is not responsible for the use of the product together with equipment (for example: power supplies, personal computers, etc.
DynaGATE 20-30 User manual Rev. 0-7 l l l l 7.2.3 7 Regulatory information Réorienter ou déplacer l'antenne de réception Augmenter la distance entre le produit et le récepteur Brancher l'appareil sur une prise de courant différente de celle à laquelle le récepteur est raccordé Consulter le revendeur ou un technicien radio/TV expérimenté pour obtenir de l'aide.
7 Regulatory information 7.2.4 DynaGATE 20-30 User manual Rev. 0-7 ISED Canada compliance This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). 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.
DynaGATE 20-30 User manual Rev. 0-7 7.2.7 7 Regulatory information RF Radiation Exposure Statement This product complies with FCC and ISED radiation exposure limits set forth for an uncontrolled environment. The antenna should be installed and operated with minimum distance of 20 cm between the radiator and your body. This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter except in accordance with FCC multi-transmitter product procedures.
7 Regulatory information 7.4 DynaGATE 20-30 User manual Rev. 0-7 RoHS 3 compliance This product is manufactured in compliance with the following Directives: l Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment.
DynaGATE 20-30 User manual Rev. 0-7 8 Interfaces overview 8 INTERFACES OVERVIEW 8.1 Rear Side Interfaces overview The Rear Side Interfaces are as follows: Figure 8.1 - Rear Side Interfaces layout Ref# Label Description 1 PWR Power IN Connector (Size 12, 3-pin MIL-26482 Male) 2 USB 0 1x USB 3.0 port Noise and Surge Protected 3 USB 1 1x USB 2.
8 Interfaces overview 8.2 DynaGATE 20-30 User manual Rev. 0-7 Front Side Interfaces overview The Front Side Interfaces are as follows: Figure 8.2 - Front Side Interfaces layout Ref# Description 1 LED indicators 2 Service Panel 3 Display Port 4 3x Isolated Digital Inputs 3x Isolated Digital Outputs 2x Not Isolated Analog Inputs Table 8.
DynaGATE 20-30 User manual Rev. 0-7 8.2.1 8 Interfaces overview Service Panel Interfaces The Interfaces available in the Service Panel are as follows: Figure 8.3 - Service Interfaces layout Ref# Description 1 Audio Connector 2 MicroSD card receptacle (push-push) (up to 32 GB MicroSD cards) 3 MicroSIM care receptacle (push-push) 4 USB 2.0 port (USB2) 5 Reserved 6 MicroSIM care receptacle (push-push) 7 TTL Serial Console (3-pin, 1.
8 Interfaces overview 8.3 DynaGATE 20-30 User manual Rev. 0-7 LED Indicators overview The LED Indicators are as follows: Figure 8.4 - LED Indicators layout Ref# Description Color 1 User 1 Dual Color (Green / Amber) 2 MiniPCIe Slot #3 Green 3 User 2 Dual Color (Green / Amber) 4 MiniPCIe Slot #2 Green 5 Power status Blue 6 MiniPCIe Slot #1 Green Table 8.
DynaGATE 20-30 User manual Rev. 0-7 9 Interfaces in detail 9 INTERFACES IN DETAIL 9.1 Wi-Fi and Bluetooth The DynaGATE 20-30 provides wireless local area network (WLAN) connectivity, in conformity with the IEEE 802.11ac/abgn Wi-Fi standard and in coexistence with BT 5.0. The antennas connectors are placed on the rear side. 9.1.1 Wi-Fi specifications Feature Description Standard IEEE 802.11 a/b/g/n/ac Wi-Fi Bluetooth 5.0 with BLE and ANT+, backwards compatible with BT4.x, BT3.x+HS, BT2.
9 Interfaces in detail DynaGATE 20-30 User manual Rev. 0-7 Feature Description RF Output Power (Typical - Conductive) 802.11a: 802.11b: 802.11g: 802.11n 5G HT20: 802.11n 5G HT40: 802.11n 2.4G HT20: 802.11n 2.4G HT40: 802.11ac 5G VHT20: 802.11ac 5G VHT40 : 802.11ac 5G VHT80: 15.5 dBm at 54M 18 dBm at 11M 15.
DynaGATE 20-30 User manual Rev. 0-7 9.2 9 Interfaces in detail Internal Cellular Modem Versions -10, -20, -22 of the DynaGATE 20-30 supports a Global LTE Cat 4 Cellular Modem. The antennas connectors are placed on the rear side. 9.2.
9 Interfaces in detail 9.2.2 DynaGATE 20-30 User manual Rev. 0-7 LTE - single antenna operation notes Single LTE antenna operation can be supported; however, typically, wireless carriers (Mobile Network Operators) impose restrictions. Please consult with your carrier before considering single LTE antenna usage. For optimum performance of the cellular interface, Eurotech recommends the use of both CELL MAIN and CELL DIV antenna connectors.
DynaGATE 20-30 User manual Rev. 0-7 9.3 9 Interfaces in detail MicroSIM card receptacles The DynaGATE 20-30 includes the following push-push MicroSIM card receptacles in the Service Panel: l 1st MicroSIM card receptacle, placed on the top side of the circuit board l 2nd MicroSIM card receptacle, placed on the bottom side of the circuit board If you have only one SIM card, use the 1st MicroSIM card receptacle. Turn OFF the SIM PIN before inserting the SIM card in the receptacle.
9 Interfaces in detail 9.4 DynaGATE 20-30 User manual Rev. 0-7 GNSS The DynaGATE 20-30 provides the following GNSS features according to the product version. Active or passive antenna supported. The antenna connector is placed on the rear side. 9.4.1 9.4.
DynaGATE 20-30 User manual Rev. 0-7 9.4.
9 Interfaces in detail 9.5 DynaGATE 20-30 User manual Rev. 0-7 USB 0, USB 1, USB 2 The DynaGATE 20-30 provides the following Host USB ports: l USB 0: USB 3.0, on the Rear Side, top port(Noise and Surge Protected l USB 1: USB 2.0, on the Rear Side, bottom port (Noise and Surge Protected) l USB 2: USB 2.0, in the Service Panel (ready for optional accessories, e.g.: ReliaCELL 10-20) 9.5.1 USB 0 connector specifications Connector Layout: Connector Specifications: l USB 3.
DynaGATE 20-30 User manual Rev. 0-7 9.5.
9 Interfaces in detail 9.6 DynaGATE 20-30 User manual Rev. 0-7 ETH 0, ETH 1 The DynaGATE 20-30 provides 2x 10/100/1000 Mbps Ethernet ports: l ETH 0 l ETH 1 The Ethernet connectors are available on the Rear Side. 9.6.1 9.6.2 Ethernet specifications Feature Description Network Standard 10BASE-Te/100BASE-Tx/1000 BASE-T IEEE 802.3 compliant Supports 1000 BASE-T PCS and auto negotiation with next page support Speeds 10/100/1000 Mbps Tri-speed Notes The interfaces are noise and surge protected.
DynaGATE 20-30 User manual Rev. 0-7 9.7 9 Interfaces in detail COM 0, COM 1 The DynaGATE 20-30 provides the following COM ports: l COM 0: RS-485/RS-422 Isolated on the Rear Side (Default: RS-485 Full Duplex) l COM 1: 1x RS-232/RS-485/RS-422 Isolated on the Rear Side(Default: RS-232) The COM connectors are available on the Rear Side. 9.7.1 Note for fail-safe and termination resistors The fail-safe and termination resistors can be driven via software. 9.7.
9 Interfaces in detail 9.8 DynaGATE 20-30 User manual Rev. 0-7 CAN 0, CAN 1 The DynaGATE 20-30 provides 2x CAN (Controller Area Network) ports compliant with the CAN Specification 2.0, Parts A and B: l CAN 0 l CAN 1 The CAN connectors are available on the rear side. Notes about CAN power supply: l The DynaGATE 20-30 can supply power to the 2 CAN ports: 100mA @ 5V (each port) l CAN power can be enabled / disabled by software l The interfaces are isolated. 9.8.
DynaGATE 20-30 User manual Rev. 0-7 9.10 9 Interfaces in detail Display Port The DynaGATE 20-30 provides a mini DisplayPort connector on the Front Side. 9.10.
9 Interfaces in detail 9.11 DynaGATE 20-30 User manual Rev. 0-7 Digital I/O and Analog IN The DynaGATE 20-30 provides the following I/Os: l 3x Isolated Digital Inputs l 3x Isolated Digital Outputs l 2x Not Isolated Analog Inputs (Factory Option: Odometer input) The I/O connector is available on the Front Side. 9.11.
DynaGATE 20-30 User manual Rev. 0-7 9.11.2 Insulated Digital Inputs 9.11.2.1 Electrical specifications 9 Interfaces in detail The table below shows the electrical specifications of the digital inputs at 24VDC of nominal supply voltage: 9.11.2.2 Characteristic Value @ 24 VDC Logic Zero 0 V ≤ VIN_low ≤ 1.
9 Interfaces in detail 9.11.3 Insulated Digital Outputs 9.11.3.1 Electrical specifications DynaGATE 20-30 User manual Rev. 0-7 The table below shows the electrical specifications of the digital outputs at 24VDC of nominal supply voltage: 9.11.3.2 Characteristic Value @ 24 VDC Maximum Current 250 mA Output ON Resistance Typical: 0.85 Ohm Maximum: 2.
DynaGATE 20-30 User manual Rev. 0-7 9.12 9 Interfaces in detail Audio connector The DynaGATE 20-30 provides an audio connector in the Service Panel. 9.12.1 Audio connector specifications Connector Layout: Connector Specifications: l Shrouded header l Gender: Male l Type: Pitch 1.25 mm; 10-pin Mating Connector Specifications: l Connector Housing l Gender: Female l Type: Pitch 1.
9 Interfaces in detail 9.13 DynaGATE 20-30 User manual Rev. 0-7 TTL Serial Console The DynaGATE 20-30 provides a 3.3 V TTL compatible Serial Console in the Service Panel. The voltage levels are as follows: l Log 1 (Hi): 2.0 to 3.3 V l Log 0 (Low): 0 to 0.8 V 9.13.1 TTL Serial Console connector specifications Connector Layout: Connector Specifications: l Shrouded header l Gender: Male l Type: Pitch 1.25 mm; 3-pin Mating Connector Specifications: l Connector Housing l Gender: Female l Type: Pitch 1.
DynaGATE 20-30 User manual Rev. 0-7 9.14 9 Interfaces in detail MicroSD card receptacle The MicroSD card receptacle is placed on the top side of the circuit board in the Service Panel. The receptacle allows you to insert a MicroSD card (up to 32 GB) for additional data storage. 9.14.1 How to insert / remove the MicroSD card in the receptacle To insert the MicroSD card, complete the following steps: 1. Orient the MicroSD card with the contacts facing the circuit board 2.
9 Interfaces in detail 9.15 DynaGATE 20-30 User manual Rev. 0-7 RTC (Real Time Clock) The DynaGATE 20-30 includes an RTC (Real Time Clocks) device with Fast Reboot Support. A SuperCAP allows for up to 2 Months Retain. 9.16 TPM The DynaGATE 20-30 includes a TPM 2.0 hardware module: Infineon SLB9670. This is connected to the CPU via an SPI interface. The TPM 2.0 device is fully supported by Linux via the tpm2-tools package that is pre-installed in the image.
DynaGATE 20-30 User manual Rev. 0-7 10 10 Eurotech Everyware IoT EUROTECH EVERYWARE IOT Everyware IoT is an IoT platform providing hardware and software building blocks with an open, integrated and managed core to allow flexibility and interoperability across different vendors, to reduce time to market and for seamless integration between OT (operational technology) domain and IT (information technology) domain. 10.
10 Eurotech Everyware IoT 10.3 DynaGATE 20-30 User manual Rev. 0-7 The ESF Wires application ESF provides also a dataflow programming model: Wires. Wires simplifies the development of Edge Computing Applications leveraging reusable configurable components. In the dataflow programming model, the application logic is expressed as a directed graph (flow) where each node can have inputs, outputs and independent processing units.
DynaGATE 20-30 User manual Rev. 0-7 10.4 10 Eurotech Everyware IoT Everyware Cloud (EC) Everyware Cloud (EC) is the IoT Integration Platform distributed and supported by Eurotech. It provides all the services required for the management of IoT gateways and devices in the field, including configuration management, application life-cycle management and remote access.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 11 Mechanical specifications and dimensions 11 MECHANICAL SPECIFICATIONS AND DIMENSIONS 11.1 Product mechanical specifications The product enclosure has the following specifications: l Material: Aluminium l Color: Black Anodized 11.2 Product mechanical dimensions The product enclosure has the following dimensions: 224 (W) x 128 (D) x 62 (H), mm (connectors excluded). All dimensions are in millimeters.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev. 0-7 12 12 How to install the product HOW TO INSTALL THE PRODUCT The product is intended for professional use and must be installed by qualified personnel only. The product must be installed in a secured location, accessible to authorized personnel only (for example in a cabinet / technical compartment). To install the product in place, complete the following steps: 1. See "Mechanical specifications and dimensions" on page 65 2. Use the 4 slots available on the enclosure 3.
12 How to install the product 12.1 DynaGATE 20-30 User manual Rev. 0-7 Respect the clearance space To ensure: l proper air circulation around the product, and l adequate space to install the product, respect the clearance space indicated in orange in the following figure (dimensions are in mm): Figure 12.
DynaGATE 20-30 User manual Rev. 0-7 13 13 Power supply. How to turn ON/OFF and reset the product POWER SUPPLY. HOW TO TURN ON/OFF AND RESET THE PRODUCT This product is not provided with any ON/OFF switch. The Power IN connector is the disconnecting means from the power supply network. 13.1 13.
13 Power supply. How to turn ON/OFF and reset the product 13.3 DynaGATE 20-30 User manual Rev. 0-7 How to Supply Power to the Product and Turn it ON WARNING ELECTRIC SHOCK HAZARD Failure to supply power correctly or to follow all operating instructions correctly, may create an electric shock hazard, which could result in personal injury or loss of life, and / or damage the equipment or other property. To avoid injuries and safely supply power to the product, complete the following steps: 1.
DynaGATE 20-30 User manual Rev. 0-7 13 Power supply. How to turn ON/OFF and reset the product 5. Connect the Earth connection terminal (Ref# E below) to an earth point in the installation 6. Connect the Power IN connector (Ref# A and C below) to the DC power source terminals (DC IN+ and DC IN-) Ref# Description A Power IN connector: pin A; Positive power supply input (VIN+) C Power IN connector: pin C; Negative power supply input (VIN-) E Earth connection terminal 7. Turn ON the DC power source.
13 Power supply. How to turn ON/OFF and reset the product 13.3.1 DynaGATE 20-30 User manual Rev. 0-7 Note about the Vehicle Ignition Sense The Vehicle Ignition Sense is a digital input that can be used to read the status of the KEY Pin. 13.4 How to turn OFF the product There are two ways to turn OFF the DynaGATE 20-30: l By entering the power OFF command l By turning OFF the Ignition Key To turn OFF the DynaGATE 20-30 by entering the power OFF command, complete the following steps: 1.
DynaGATE 20-30 User manual Rev. 0-7 14 14 How to maintain the product HOW TO MAINTAIN THE PRODUCT Periodically inspect the product to verify its integrity and to ensure proper operation. To maintain the product, complete the following steps: 1. Carefully read and understand the instructions contained in the section "Safety instructions" on page 9 2. Safely remove the power supply 3. Verify the installation of the product 4. Clean the product 14.
(This page has been intentionally left blank)
DynaGATE 20-30 User manual Rev.
EUROTECH.COM HEADQUARTERS Via Fratelli Solari, 3/a 33020 Amaro (UD) - Italy Tel: +39 0433.485.411 Fax: +39 0433.485.499 Email: welcome@eurotech.com Web: www.eurotech.com For your Eurotech local contact refer to: eurotech.com/contacts For the Eurotech Global Support Centre refer to: support.eurotech.com For the Eurotech Download Area refer to: eurotech.
