Gtech GWT154 User Manual
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Gtech GWT154 User Manual

Gtech GWT154 User Manual

Aircon radio
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REV DESCRIPTION
1.0
Initial Document
1.1
Updated Transmit Power settings
This document contains GTECH confidential and proprietary information, know-how, trade secrets,
intellectual property and/or methodologies and is intended only for the use of the individual or entity to
which it is addressed. It may be privileged, and is proprietary, confidential and otherwise exempt from
disclosure under applicable law. This document shall not be modified, reproduced, copied or
transferred without proper prior authorization from GTECH.
APPROVALS
AUTHOR:
Henry Constant
RESPONSIBLE ENGINEER:
Henry Constant
MANUFACTURING ENGINEER:
S. Leigh
QUALITY:
Ray Snow
PROPRIETARY NOTICE:
Proprietary Notice applies to all pages
DATE
GTECH Aircon Radio (Model GWT154)
DATE
June 29, 2011
July 5, 2011
User's Guide
NO. 96-1886-01E
PAGE
REVIEWED
REV.
1.1
1
72
OF

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Summary of Contents for Gtech GWT154

  • Page 1 July 5, 2011 PROPRIETARY NOTICE: This document contains GTECH confidential and proprietary information, know-how, trade secrets, intellectual property and/or methodologies and is intended only for the use of the individual or entity to which it is addressed. It may be privileged, and is proprietary, confidential and otherwise exempt from disclosure under applicable law.

  • Page 2: Table Of Contents

      Audience ............................ 4   Applicable Documents ....................... 4     Key Features ........................5     GWT154 Wireless Transceiver Application Circuits ..........6     System Components ........................6     Electronics Overview ......................... 6     Radio Module Pin Definitions ....................7  ...
  • Page 3   10.3   OEM Responsibilities to comply with FCC and Industry Canada Regulations ...... 70   10.4   End Product Labelling ......................71   11.0   Contacting GTECH Corporation ................72   . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 4: Introduction

    INTRODUCTION 1.1 Purpose, Overview & Scope  The purpose of this document is to provide details regarding the use of the GWT154 transceiver module as a cable replacement between GTECH online lottery terminals and associated peripherals. The GWT154 transceiver module is based on the IEEE 802.15.4-2006 standard, this wireless link provides a point to multipoint peripheral bus with low latency and modern security features.

  • Page 5: Key Features

     802.15.4-2006 compliant transceiver operating in the unlicensed Industrial, Scientific, and Medical (ISM) frequency band of 2.400 – 2.4835 GHz.  Lost Link Prevention – The GWT154 provides a failsafe timeout in the event the GTECH Terminal doesn’t receive a response from the peripheral.

  • Page 6: Gwt154 Wireless Transceiver Application Circuits

    GTECH equipment. For existing or legacy GTECH products, the Radio Module should be mounted to the Host Board via the two 1x10 headers. These mated boards are enclosed in a plastic housing and this constitutes the Dongle solution.

  • Page 7: Radio Module Pin Definitions

    Figure 1 – Block Diagram 3.3 Radio Module Pin Definitions  The communication between the Host board and the Radio module is via UART. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 8 Module status indicator  14  NC/P1_6/UTX1  No Connect.  Module option to connect to alternative UART TXD  15  NC/P1_7/URX1  No Connect.  Module option to connect to alternative UART RXD  16  RTS_N  Request to Send Flow Control  17  TX_EN  RS‐485 driver enable output line.  Disables bus driver during hardware  reset  18  NC  No Connect.  Module option to connect to port P1_4  19  NC  No Connect.  Module option to connect to port P1_2  20  STATUS_LED  No Connect.  Module option to connect to port P1_0  Table 1 - The interface pin assignments and definitions  . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 9: Mechanical Drawings

    3.4 Mechanical Drawings  Figure 3 - Radio Module (1.0” x 1.33”) (antenna option not shown) Figure 4 - Host Board with Radio Module (1.6” x 2.25”) . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 10: Mounting Considerations

    For new designs, the footprint design on the host/carrier board will depend on the host/carrier board requirements, desire for compatibility with other GWT154 series modules, and the desired antenna. (Note: Figure 6 – Example of the GWT154 Radio Module mounting to a Host/Carrier Board does not show the external antenna option.) .
  • Page 11 Figure 6 – Example of the GWT154 Radio Module mounting to a Host/Carrier Board 3.5.2 Legacy GTECH Products  For existing or legacy GTECH products the Radio Module mounts to the Host Board and is enclosed in a plastic housing, referred to as the Dongle. This Host board provides RS-485 and USB interface connectors and an optional DC power connection.
  • Page 12 Figure 7 - Radio Module mounted to the Host Board Figure 8 - Dongle Assembly (Top and Bottom view) . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 13: Radio Module Performance Characteristics

    802.15.4 modulated interferer, PER = 1%   Alternate Channel  Wanted signal 2440 MHz at ‐82 dBm,            Rejection (±10 MHz)   802.15.4 modulated interferer, PER = 1% Channel Rejection (≥  Wanted signal 2440 MHz at ‐82 dBm,            ±20 MHz)   802.15.4 modulated interferer, PER = 1% Table 4 - RF Receive Specifications (At 25°C – 3.3VDC) . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 14 Spurious Emissions (15.205  15.209 general  specified Part 15.35 – up to 10   restricted bands)  emissions  harmonic  Power Spectral Density  8dBm/3kHz  Conducted to antenna  Radio Frequency Exposure  Mobile device     Classification  Fixed antenna or  Antenna Requirement  non‐standard     connector  Table 6 - Primary EMC Certification Requirements FCC Part 15 – Modular Certification . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 15: Host Board Electrical Characteristics

    Table 10 - USB Interface – Fully compliant with USB 2.0 specification 3.8 GWT154 Recommended Configurations  The following drawings identify typical GTECH installation configurations. 1. Installation of an existing RS485 peripheral into a legacy terminal. . 96-1886-01E GTECH Aircon Radio (Model GWT154)
  • Page 16 2. Installation of a new RS485 peripheral with the GWT154 embedded radio module (or modified RS485 peripheral with the GWT154 OEM module replacement). 3. Installation of an existing USB Serial peripheral running GTECH 485 Packet Protocol into a legacy terminal.

  • Page 17: Rf Module Operation

    User Data payloads will pass through the wireless link transparently, with virtually the same GTECH485 protocol presented at both ends. The PAN Coordinator radio will be attached the GTECH Terminal Host CPU, which is responsible for initializing and managing the wireless network. Thus, the Terminal can control the RF channel and other infrastructure parameters, in addition to commissioning peripherals and controlling security.
  • Page 18 Figure 9 - Typical Data Flow 3.9.1 Break Processing  Legacy GTECH Peripherals recognize a UART Break condition on the GTECH485 bus as a hardware reset. The Coordinator radio hardware does not include dedicated UART Break detect hardware, but the Coordinator radio firmware will monitor the GTECH485 bus for a UART Break condition. In addition, the Host CPU may issue a Break command packet to the Coordinator.
  • Page 19 The GTECH485 protocol ACK is actually a separate transaction. At the low level it looks exactly the same as any other data transaction. 3.9.5 Transmit Power Level  The TIMAC Application Programming Interface allow setting of the radio’s with a 1dB resolution . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 20: Setting Compliance Limits When Using Host Software

    63.1 12.6 0xC5 0x75 63.1 12.6 0x85 0x85 20.0 20.0 Note: When using Optional External Dipole Antenna, RF Channel 26 reduces for FCC Compliance: 0x65 0x85 20.0 Table 11 - Compliance Limits . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 21: Wireless Network Infrastructure

    The Host CPU can also pre-set the PAN-ID or it can automatically select an unused PAN-ID during network commissioning. The GTECH 802.14.5 wireless network will be implemented as a non-beacon-enabled network.

  • Page 22: Device Security

    Devices. The Coordinator generates a random network key at the time of commissioning. The random nature of the key is ensured by dedicated hardware in the CC2530 that samples bits in the I and Q data streams in the radio receiver . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 23 Figure 11 - Pairing Sequence   . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 24: Non Volatile Settings

    Host CPU’s serial interface protocol. The Host CPU will have no knowledge, nor access to, a radio network’s unique encryption key. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 25: Wireless Data Transport

    Peripherals on its local 485 bus. In the event the Coordinator is selected by the SYN address packet as the Peripheral, the Coordinator will broadcast the SYN Unlisten address to set all peripherals OFF-line. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 26: Data Security

    TIMAC version 1.3.0 does not currently support security per the 802.15.4-2006 standard; however TI is promising to add this functionality to the stack in a future release. The initial release of the firmware will used CMM* encryption with fixed keys. Key management, the . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 27: Acknowledgement

    ..Fields: Preamble PHY Payload 9 <= n <= 127 (aMaxPHYPacketSize) Len. GTECH Unencrypted 802.15.4 MAC Packet Structure Bytes: ..Short Short MAC Safe Payload 1 <= n <= 102...

  • Page 28: Single Unicast Mac Packet

    The End Device radio reassembles fragments into a buffer until the entire packet has been received, before sending it to the peripheral. Fragments must be sent and received in sequence; a fragment received out of sequence implies a lost . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 29: Fragmentation Packet Structure

    Host CPU serial packets requiring just one RF packet clear the fragmentation flag and the remaining 7-bit files is the absolute byte-count of the payload up to the maximum safe 802.15.4 encrypted packets payload size. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 30 81 <= Length <= 111 n = Length reserved 112 <= Length <=127 illegal 112 (0x70) n = 80 113 (0x71) n = 80 114 (0x72) n = 80 115 (0x73) n = 80 . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 31 125 (0x7D) n = 80 126 (0x7E) n = 80 127 (0x7F) n = 80 1 <= Length <= 80 n = Length Table 12 - Fragmentation Codes . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 32: Wireless Inter-Communication

    By definition, all radio configuration packets include a byte length as part of the header. Codes A radio configuration packet’s checksum may be calculated and verified without knowing the received 802.14.5 packet’s absolute payload length. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 33: Host And Peripheral Wired Interfaces

    0x07 Unused 0x08 Unused 0x09 Unused 0x0A Unused 0x0B Unused 0x0C Unused 0x0D Unused 0x0E Unused 0x0F Reserved: Legacy Exception 0x10 Reserved 0x11 DC1/XON Reserved 0x12 Reserved 0x13 DC3/XOFF Reserved 0x14 Reserved . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 34 Unused 0x1F Unused Table 13 - GTECH Packet Type Codes 7.1.3 GTECH Address Packet  The GTECH485 protocol uses query/response method to address individual Peripherals in a multi-drop wired network. The Terminal issues a specific address command to select the active Peripheral, all other Peripherals are to un-assert themselves from the bus.
  • Page 35 Req 2 Req 1 Req 0 Structure 4: GTECH Protocol Address Status Refer to for bit field assignments in Address Response Status byte. A special Un-Listen address (0x16) in the restricted range may be issued by the Host CPU to force all peripherals off-line.

  • Page 36: No . 96-1886-01E Rev

    Figure 17 - GTECH Data Packet Structure 7.1.5 Data Exception Handling  Special handling is required for binary data with values between 0x04 to 0x06 and 0x0F to 0x1B because these ranges are reserved for GTECH485 protocol control characters. The control character ESC (0x1B) is used as an escape prefix to signal that the following byte was in the range of the control characters and has been modified (1’s complemented) to place it outside the reserved range.

  • Page 37: Wired Interface Infrastructure

    The Coordinator radio is controlled by the Host CPU by encapsulating configuration messages in a GTECH485 protocol data packet. Radio configuration packets must implement the GTECH485 exception protocol so not to be misinterpreted by any other legacy GTECH peripherals that share the same wired 485 bus as the Coordinator radio.
  • Page 38 Radio should reply with the same Command Code with the Acknowledge bit set to zero(0) and zero Length. Command packets with failed checksums, unknown Command codes, or of incorrect Length, will be ignored. The radio will not respond to failed command packets. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 39 Channel of the 2.4GHz 802.15.4 band 0x07 Set Energy Scan Start energy scan on all 802.15.4 Channels. 0x08 Get PAN Scan Variable PAN List of PAN Descriptors retrieved from Active Coordinators scan. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 40 Firmware version in the format: Version YYYY_MM_DD 0x1F Reset / Target Force all End Devices to Reset and assert a Break Break condition on their 485 bus. Table 15 - Coordinator Radio Command Codes . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 41 Seconds elapsed since Power-On/Reset event. Rollover occurs in about 136-years. 7.2.2.2 Mode 0x01 (Host to Radio) This configuration command defines the basic operating modes of the radio and provide low-level network control functions. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 42 Returns the current 802.15.4 / 2.4GHz Channel Mask bit settings. Bytes: Field: 0x02 Channel Default Code Length Mask Channel Structure 11: Channel Mask Status Packet Channel Mask: 2.4GHz 802.15.4 Channel Mask bit fields. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 43 0x00 0xF8 0x7F 0x00 Default Channel: Coordinator’s start-up channel. 7.2.2.5 Get PAN-ID (0x04) GTECH 802.15.4 radios will employ short (16-bit) Personal Area Network IDs. Get PAN-ID return the Coordinator radio’s PAN address. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 44 CH 27 CH 28 Code Length RSSI RSSI RSSI RSSI RSSI RSSI Structure 16: RSSI Scan Result Length: Busy scanning. Energy Scan failed. Undefined. 2 to 15 16 to 18 Channels scanned. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 45 Seven bytes per PAN Descriptor. Descriptor: PAN Descriptor Structure for each network beacon response. Bytes: Field: Address PAN-ID Channel Link Security Security Quality Fail Parameters Structure 19: PAN Descriptior Address: Short (16-bit) address of beacon Coordinator. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 46 Structure 21: Associating Devices Address list End Device: End Device address structure with EUI-64 and Short addresses. Bytes: Field: EUI-64 Short Address Structure 22: End Device Address Structure EUI-64: Extended Unique Identifier (MAC Address) for End Device. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 47 Structure 25: End Device Access Control Structure Key Index: Auxiliary Security Header Key Index value for this ACL entry. 0x00 No AES encryption key assigned. 0x01 Factory AES key (requesting to join). 0x02 Network AES key (joined). . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 48 Type set to 0(zero) identifies an address overloaded message, Short or Extended address length is determined by the Length field. Bytes: Field: 0x0F Type GTECH Code Length Address Structure 28: Set End Device Address Request Packet (GTECH Address) . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 49 Extend address strings may be handled by the command structure in the future. SYN Response messages from End Devices to Coordinator are also identified by the SYN type with the GTECH Address field containing the Address and peripheral Status response bytes.
  • Page 50 Coordinator, or most recently selected End Device’s radio. The Device field must be to for the target device; the Transmit Power, Antenna and Failsafe fields are unused when Get RF is issued, the Coordinator fills them in response. Bytes: . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 51 Register 79 mW 0xD5 63 mW 0xC5 50 mW 0xB5 40 mW 0xA5 32 mW 0x95 0x95 20 mW 0x85 16 mW 0x75 0x75 10 mW 0x65 0x65 6.3 mW 0x55 0x55 . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 52 Attempts to select End Devices that are blocked by the filter (bit set to 0) disconnects the Coordinator from any previously selected End Device radios. The mask structure consists of 32 8-bit bytes for a total of 256 GTECH Peripheral addresses that are filtered. Bytes:...
  • Page 53 7.2.2.24 Reserved (0x17) 7.2.2.25 Get Ping (0x18) Polls the Coordinator radio for any response to a Host CPU Send Ping. Replies with Length = zero(0) if no Ping response has been received. Bytes: . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 54 Reserved for Ping response, Host CPU should fill with zero() . Short Address: 802.15.4 Short Address for End Device to Ping, setting to Broadcast 0xFFFF (255, 255) will instead address the most recently selected GTECH Peripheral’s End Device radio. EUI-64: Reserved for Ping response, Host CPU should fill with zeros(0.0.0.0.0.0.0.0).
  • Page 55 Structure 44: Get Version Version: ASCII byte string in the format YYYY_MM_DDr(null) where: YYYY 4-digit year i.e. 2000. 2-digit month i.e. 04 (April). 2-digit day. revision letter (a to z). null 0 (‘/0’). . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 56 Bytes: Field: 0x1F Target Code Length Structure 45: Generate Reset / Break Sequence Target: Resets Terminal radio (coordinator). 0x00 Broadcasts Reset command to all End Devices. 0x01 Reserved 0x02 to 0xFF . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 57: User Interface

    USER INTERFACE The basic GWT154 Radio Module has one user LED status indicator and one momentary contact pushbutton switch input. The following radio modes are initiated and indicated by the following: Uninstalled Radio  An un-commissioned radio from the factory defaults as an End Device that has not been joined to a PAN Coordinator.
  • Page 58 GTECH Technical Training and Support Services, (401) 392-7961. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 59: Host Port Configuration Sequences

    If new devices have been accepted to the PAN the Terminal/Host should also instruct the Coordinator radio to save the updated ACL to persistent memory.  Set Stop Joining Mode  Set Mode to NV Save Optionally, the Terminal/Host may obtain the radio’s firmware version. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 60 05 00 1B F9 00 FA 04 Scan 05 00 86 00 7A 04 SYN-Address 16 01 01 00 Get Energy 05 00 1B F9 00 FA 04 Scan 05 00 86 00 7A 04 . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 61 Get ACL 05 00 0C 00 F4 04 05 00 8C 00 74 04 SYN-Address 16 01 01 00 Get ACL 05 00 0C 00 F4 04 05 00 8C 00 74 04 . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...
  • Page 62 Set Mode: NV Save. Message Terminal/Host Coordinator Radio SYN-Address 16 01 01 00 Set Mode 05 00 01 01 40 BE 04 05 00 81 00 7F 04 9.1.13 Select Peripheral Address, Get Radio Firmware Version  Get Version: 2011_03_02b. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 63: Coordinator Configuration Setting Firewall Address Mask

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 CE 04 05 00 95 00 6B 04 05 00 1B EB 00 EC 04 Peripheral Address Mask . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 64: Coordinator Configuration - Get End Device Statistics

    0x30, 0x31 to 0x5F. Get Ping: Coordinator RSSI 207, Coordinator LQI 89, End Device RSSI 223, End Device LQI 134, Transmit Power 15, Short Address 0x0001, EUI-64 0.18.75.0.1.26.56.37, Test Data 0x30, 0x31 to 0x5F. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 65: Coordinator Configuration - Setting End Device Parameters

    Message Terminal/Host Coordinator Radio SYN-Address 16 01 01 00 Set RF 05 00 1B EC 1B FB 00 0A Configuration 00 63 7C 04 05 00 93 00 6D 04     . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 66: Peripheral Configuration, Status

    Terminal/Host above, though there may be differences. 9.5.1 Select Peripheral Address, Set NV Save Mode  Set Mode: NV Save Message Terminal/Host Coordinator Radio SYN-Address 16 01 01 00 Set Mode 05 00 01 01 40 BE 04 05 00 81 00 7F 04 . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 67: Agency Statements

     To comply with FCC/IC RF exposure requirements for mobile transmitting devices, this transmitter should only be used or installed at locations where there is at least 20cm separation distance between the antenna and all persons.     . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 68: Industry Canada Statements

    User manuals for transmitters equipped with detachable antennas shall also contain the following notice in a conspicuous location: This radio transmitter Model GWT154 (IC: 1706AGWT1541T1R) has been approved by Industry Canada to operate with the antenna types listed below with the maximum permissible gain and required antenna impedance for each antenna type indicated.
  • Page 69 1. cet appareil ne peut causer d'interférences, et 2. cet appareil doit accepter toute interférence, y compris les interférences qui peuvent causer un mauvais fonctionnement de l'appareil. . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

  • Page 70: Oem Responsibilities To Comply With Fcc And Industry Canada Regulations

    10.3 OEM Responsibilities to comply with FCC and Industry Canada Regulations  The GWT154 Radio Module has been certified for integration into GTECH products only by OEM integrators under the following conditions: 1. The antenna(s) must be installed such that a minimum separation distance of 20cm is maintained between the radiator (antenna) and all persons at all times.

  • Page 71: End Product Labelling

    10.4 End Product Labelling  The GWT154 Radio Module is labeled with its own FCC ID and IC Certification Number. If the FCC ID and IC Certification Number are not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module.

  • Page 72: Gtech Aircon Radio (Model Gwt154)

    GTECH Center 10 Memorial Boulevard Providence RI, 02903 401-392-1000 Website http://www.gtech.com Technical Support Ted Carr Sr. Product Compliance Specialist, 401-392-7721 Online Customer Service http://www.gtech.com/about_gtech/customer_net.asp Sales Contact Dennis Hultzman, Director of Purchasing, 401-392-7383 . 96-1886-01E GTECH Aircon Radio (Model GWT154) PAGE...

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