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MDS 4710/9710 Technical Manual

MDS 05-3305A01, Rev. E

KEY

TX Key

This command activates the transmitter. See also the

DKEY

command.

MODEL

Model Number Code

This command displays the radio’s model number code.

MODEM [xxxx, NONE]

Analog/Digital

Modem Selection

This command selects the radio’s modem characteristics. For digital
operation, enter

9600

(MDS x710A) or

19200

(MDS x710C). For analog

operation, enter

NONE

When the

MODEM

is set to

NONE

, the analog TX Input and RX Audio out-

puts of the

DATA INTERFACE

are used to interface with the connected

external modem. These levels must match the audio signal level require-
ments of the external modem.

See “RXLEVEL [–20 to +6]” on Page 30

and

“TXLEVEL [–20 to +6, AUTO]”

on Page 32 for details on setting

these levels.

OWM [XXX...]

Owner’s Message

Use this command to display or program an owner’s message. To pro-
gram the owner’s message, type

OWM

then the message, followed by

To display the owner’s message, type

OWM

then

. The owner’s

message appears on the display.

OWN [XXX...]

Owner’s Name

Use this command to display or program an owner’s name. To program
the owner’s name, type

OWN

then the name, followed by

To display the owner’s name, type

OWN

then

. The owner’s

name appears on the display.

PTT [0–255]

Push-to-Talk Delay

Use this command to display or program the key-up delay in millisec-
onds.

This timer specifies how long to wait after the radio receives a key signal
from either the PTT or RTS lines (on the

DATA INTERFACE

), before actu-

ally keying the radio.

PWR [20–37]

TX RF Power

Output Level

NOTE:

This function might not be available, depending on certifica-
tion requirements in a particular country.

ENTER

Содержание MDS 9710T

Страница 1: ...Installation and Operation Guide Technical Manual MDS 05 3305A01 Rev E OCTOBER 2011 400 MHz and 900 MHz Remote Data Transceivers MDS 4710 9710 Series Including MDS 4710A C M and MDS 9710A C M T ...

Страница 2: ...guration with a Hand Held Terminal HHT Set the transmit frequency TX xxx xxxx Set the receive frequency RX xxx xxxx Set the baud rate data interface parameters as follows Use the BAUD xxxxx abc command where xxxxx equals the data speed 110 38400 bps and abc equals the communication parameters as follows a Data bits 7 or 8 b Parity N for None O for Odd E for Even c Stop bits 1 or 2 Example BAUD 960...

Страница 3: ...ps 6 2 2 Transceiver Mounting 7 2 3 Antennas and Feedlines 9 Feedlines 9 2 4 Power Connection 10 2 5 Safety Earth Ground 10 2 6 Data Interface Connections 11 2 7 Using the Radio s Sleep Mode 12 System Example 13 3 0 OPERATION 13 3 1 LED Indicators 14 3 2 RSSI Measurement 14 4 0 TRANSCEIVER PROGRAMMING 15 4 1 Hand Held Terminal Connection Startup 15 4 2 Hand Held Terminal Setup 16 4 3 Keyboard Comm...

Страница 4: ... SER 30 SHOW DC PORT PWR 30 SNR 30 SREV 31 STAT 31 TEMP 31 TOT 1 255 ON OFF 31 TX xxx xxxx 31 TXLEVEL 20 to 6 AUTO 32 UNIT 10000 65000 32 5 0 TROUBLESHOOTING 32 5 1 LED Indicators 32 5 2 Event Codes 33 Checking for Alarms STAT command 33 Major Alarms vs Minor Alarms 33 Event Code Definitions 34 6 0 TECHNICAL REFERENCE 35 6 1 MDS 4710A C M and 9710A C M T Transceiver Specifications 35 6 2 Helical F...

Страница 5: ...ct our Customer Service Team using the information at the back of this guide In addition manual updates can often be found on the GE MDS Web site at www microwavedata com ISO 9001 Registration GE MDS adheres to this internationally accepted quality system stan dard MDS Quality Policy Statement We the employees of GE MDS LLC are committed to achieving total customer satisfaction in everything we do...

Страница 6: ...e total composite power could exceed 200 watts EIRP The antenna location should be such that only qualified technical personnel can access it and that under normal operating conditions no other person can touch the antenna or approach within 3 05 meters of the antenna FCC Part 15 Notice The MDS 4710 AND 9710 transceivers licensed under Part 15 of the FCC Rules MDS 4710 Part 90 210 403 512 MHz MDS ...

Страница 7: ...t for use in the hazardous locations described above It must either be mounted within another piece of equipment which is cer tified for hazardous locations or installed within guidelines or condi tions of approval as set forth by the approving agencies These conditions of approval are as follows The transceiver must be mounted within a separate enclosure which is suitable for the intended applica...

Страница 8: ...s required the extraction and use of natural resources for its production Improper disposal may contami nate the environment and present a health risk due to hazardous sub stances contained within To avoid dissemination of these substances into our environment and to diminish the demand on natural resources we encourage you to use the appropriate recycling systems for disposal These systems will r...

Страница 9: ...on and demodulation is accomplished using Digital Signal Pro cessing DSP DSP adapts to differences between components from unit to unit and ensures consistent and repeatable performance in ambient temperatures from 30 to 60 degrees Celsius The use of Dig ital Signal Processing eliminates the fluctuations and variations in modem operation that degrade operation of analog circuits The transceiver is...

Страница 10: ...ntrol and measurement and so on The radio system can replace a network of remote monitors currently linked to a central location via leased telephone line At the central office of such a system there is usually a large mainframe computer and a way to switch between individual lines coming from each remote mon itor In this type of system there is a modulator demodulator modem at the main computer a...

Страница 11: ...in Figure 2 This is network arrangement useful for high speed polling applications NOTE MDS 4710 9710 remotes do not support full duplex operation Switched Carrier operation is a half duplex mode where the master sta tion transmitter is keyed to send data and unkeyed to receive The trans ceiver uses different frequencies for transmit and receive This prevents different remotes from interfering wit...

Страница 12: ...nfigured when it was shipped from the factory This number is subject to many variations depending on what options are installed and in which country the product is used Contact GE MDS if you have questions on the meaning of the code 1 4 Contents of Standard Shipping Packages Table 1 and Table 2 list the content of routine shipments of MDS 4710 9710 transceivers The contents might be modified to re...

Страница 13: ...it HHT Terminal that plugs into the radio for programming diagnostics and control Includes carrying case and cable set 02 1501A01 RTU Simulator Test unit that simulates data from a remote terminal unit Comes with polling software that runs on a PC Useful for testing radio operation 03 2512A01 Orderwire Module External device that allows temporary voice communication Useful during setup and testing...

Страница 14: ...ectional antennas in the direction of the associated network s Master Station 3 Connect the data equipment to the transceiver s DATA INTERFACE connector Use only the required pins for the application Do not use a fully pinned 25 conductor cable Basic applications might require only the use of Pin 2 Transmit Data TXD Pin 3 Received Data RXD and Pin 7 Signal Ground The radio can be keyed by using th...

Страница 15: ...ating frequencies are not set at the factory unless they were specified at the time of order Determine the transmit and receive frequencies to be used and follow the steps below to program them 6 Connect a hand held terminal HHT to the DIAG diagnostic con nector When the HHT beeps press to receive the ready prompt 7 Set the operating frequencies using the TX xxx xxxx transmit and RX xxx xxxx recei...

Страница 16: ...sions Using screws longer than 1 4 inch 6 mm to attach the brackets to the radio might damage the internal PC board Use only the supplied screws 1 7 5 4 4 4 CM ALTERNATE POSITION 7 25 in 184 mm 2 75 in 70 mm 8 5 in 216 mm 6 63 in 168 mm 5 625 in 143 mm 2 0 in 50 mm 2 25 in 57 mm CAUTION POSSIBLE EQUIPMENT DAMAGE ...

Страница 17: ...ion of antenna feedline is very important Avoid poor quality cables as they will result in power losses that can reduce the range and reliability of the radio system Table 4 and Table 5 show the losses that will occur when using various lengths and types of cable at 400 and 960 MHz Keep the cable as short as possible to minimize signal loss Table 4 Length vs Loss in Coaxial Cables at 400 MHz Cable...

Страница 18: ...ound to the transceiver case A ground can be connected to one of the four screws on the bottom of the transceiver Do not use any of the four screws that hold together the upper and lower parts of the transceiver case Connect all rack equipment and associated hardware grounds to the building s ground system for the primary power The objective is to create a single point ground system keeping all gr...

Страница 19: ...itter when RTS is at logic high 5 OUT CTS Clear to Send Output Goes logic high after the programmed CTS delay time has elapsed DCE or keys an attached radio when RF data arrives CTS KEY 6 OUT DSR Data Set Ready Provides a 6 Vdc DSR signal through a 2 5 k resistor 7 Signal Ground Connects to ground negative supply potential at radio s PC board 8 OUT DCD Data Carrier Detect Goes to logic high when t...

Страница 20: ...rain on this connection trips the self resetting fuse F1 on the transceiver PC board The voltage at this pin matches the input voltage to the transceiver 19 OUT 9 9 Vdc Regulated Output Provides a source of regulated voltage at 100 mA for low power accessories 20 Do not connect Reserved for future use 21 OUT RSSI Received Signal Strength Indication Connect a DC voltmeter to this pin to read the re...

Страница 21: ...trol the radio s sleep mode refer to GE MDS Product Bulletin PB 0904 Figure 7 RTU to Pin 12 Interconnect Circuit System Example The following example describes Sleep Mode implementation in a typ ical system Use this information to configure a system that meets your particular needs Sleep Mode Example You need communication to each remote site only once per hour Program the RTU to raise an RS 232 l...

Страница 22: ...alternative to using an HHT the radio s received signal strength RSSI can be read with a DC voltmeter connected to Pin 21 of the DATA INTERFACE connector Figure 8 shows the relationship between received signal level and the DC voltage on Pin 21 of the DATA INTER FACE connector Note Readings are not accurate for incoming signal strengths above 50 dBm PWR DCD TXD RXD Table 7 LED Status Indicators LE...

Страница 23: ...or connecting and using the GE MDS Hand Held Terminal For more information about the terminal refer to the instructions included with the HHT kit The steps below assume that the HHT is configured for use with the transceiver 80 character screen display If the HHT was previously used with a different model transceiver or if its default settings were changed refer to Section 4 2 Hand Held Terminal S...

Страница 24: ...ze an HHT for use with the transceiver These steps might be required if the HHT was previously used with a different radio or if the HHT default settings were inadver tently altered 1 Plug the HHT into the DIAG connector Enable the setup mode by pressing the and keys in sequence The dis play shown in Figure 10 appears Invisible place holder Figure 10 HHT Setup Display ENTER ANTENNA 13 8 VDC Z CTRL...

Страница 25: ...is a reference chart of software commands for the transceiver Programmable information is shown in brackets fol lowing the command name See Section 4 4 Detailed Command Descriptions Page 21 for detailed command descriptions Entering Commands To enter a command type the command and then press the key For programming commands 1 Type the command 2 Press the key The appropriate information or values f...

Страница 26: ...ing the HHT Use the key to access numbers press again to return to letter mode Use the key to edit information or command entries The flashing square cursor indicates that Letter Mode is selected The flashing superscript rectangular cursor indicates that Number Mode is selected SHIFT ESC BKSP ...

Страница 27: ...er to the com mand descriptions for command information EEPROM FAILURE The INIT command was unable to write to EEPROM This is a serious internal radio error Contact GE MDS See Table 9 for a summary of the user commands Table 9 Command Summary Command name Function ALARM Details Page 21 Read current operating condition of radio AMASK 0000 0000 FFFF FFFF Details Page 21 Set or display hex code ident...

Страница 28: ...etails Page 28 Set or display the Push to Talk delay in milliseconds PWR 20 37 Details Page 28 Set or display the transmit power setting RSSI Details Page 29 Display the Received Signal Strength Indication RTU ON OFF 0 80 Details Page 29 Re enables or disables the radio s internal RTU simulator and sets the RTU address RX xxx xxxx Details Page 29 Set or display receiver frequency RXLEVEL 20 to 6 D...

Страница 29: ...he command name ALARM The ALARM command displays a summary of the radio s current oper ating condition An eight digit hexadecimal code is presented that can be decoded as described in Major Alarms vs Minor Alarms on Page 33 AMASK 0000 0000 FFFF FFFF Alarm Mask The AMASK command displays or sets a mask indicating which events cause the alarm output signal to be active Normally the mask is FFFF FFFF...

Страница 30: ...alibrated 0080 0000 0000 0000 1000 0000 0000 0000 0000 0000 09 DSP download fault 0040 0000 0000 0000 0100 0000 0000 0000 0000 0000 10 NVRAM fault 0020 0000 0000 0000 0010 0000 0000 0000 0000 0000 11 Reserved 12 Receiver time out 0008 0000 0000 0000 0000 1000 0000 0000 0000 0000 13 Time out command 0004 0000 0000 0000 0000 0100 0000 0000 0000 0000 14 Reserved 15 Output power fault 0001 0000 0000 0...

Страница 31: ...t AMASK Use the AMASK command to reset any or all of these bits if alarm outputs for specific alarms are not desired Table 10 provides a list of event codes To disable the alarm signal for a specific alarm reset the bit associated to the specific alarm and convert back to hexidecimal ASENSE HI LO Alarm Sense The ASENSE command sets or displays the sense of the alarm output at Pin 25 of the DATA IN...

Страница 32: ...DATA INTERFACE connector Outgoing transmitted data is not affected by this command If data buffering is OFF the radio operates with the lowest possible average latency Data bytes are thus sent out the DATA INTERFACE port as soon as an incoming RF data frame is disassembled Average and typ ical latency will both be below 10 ms but idle character gaps might be introduced into the outgoing data flow ...

Страница 33: ...ility of the radio to key the transmitter as data is received at the DATA INTERFACE connector Asserting RTS keys the radio regardless of this command setting If DATAKEY is set to ON the radio will key when a full data character is received at the transceiver s DATA INTERFACE connector If DATAKEY is set to OFF the radio needs to be keyed by asserting either the RTS or PTT signal or with the CKEY or...

Страница 34: ...owing baud rates 1200 2400 4800 9600 19200 default DTYPE NODE ROOT Unit s Diagnostics Type This command establishes the local radio as a root radio or node radio for network wide diagnostics Entering DTYPE NODE configures the radio as a node radio Entering DTYPE ROOT configures the radio as a root radio Entering the DTYPE command alone displays the current setting See Performing Network Wide Remot...

Страница 35: ...IT is entered CTS is set to 0 DATAKEY is set to ON DEVICE is set to DCE PTT is set to 0 SCD is set to 0 TOT is set to 30 seconds and set to ON PWR is set to 37 dBm 5 watts All other commands stay in the previously established setting INIT 4710 9710 Packaged Model Initialization This command sets the transceiver for normal operation outside the P 20 chassis by setting the following parameters to th...

Страница 36: ...on setting these levels OWM XXX Owner s Message Use this command to display or program an owner s message To pro gram the owner s message type OWM then the message followed by To display the owner s message type OWM then The owner s message appears on the display OWN XXX Owner s Name Use this command to display or program an owner s name To program the owner s name type OWN then the name followed ...

Страница 37: ...E MDS proprietary polling programs poll exe and rsim exe The internal RTU simulator is available whenever diagnos tics is enabled in a radio This command also sets the RTU address to which the radio will respond Use the internal RTU for testing system payload data or pseudo bit error rate testing It can be helpful in isolating a problem to either the external RTU or the radio Use the RTU simulator...

Страница 38: ...ong to wait after the removal of the keying signal before actually releasing the transmitter A value of 0 ms unkeys the transmitter immediately after the removal of the keying signal SER Radio s Serial Number This command displays the radio s serial number as recorded at the fac tory SHOW DC PORT PWR Show Power Settings The SHOW command displays different types of information based on the command ...

Страница 39: ...reen and additional alarms are viewed by pressing the key Detailed descriptions of event codes are provided in Table 11 on Page 34 TEMP Internal Temperature This command displays the internal temperature of the transceiver in degrees Celsius TOT 1 255 ON OFF TX Timeout Timer This command sets or displays the transmitter Time out Timer value 1 255 sec as well as the timer status ON or OFF If the ti...

Страница 40: ... at the master station as the rest of the system depends on the master for polling commands If the master station has problems the operation of the entire network can be compromised It is good practice to start by checking the simple things For proper operation all radios in the network must meet these basic requirements Adequate and stable primary power The radio contains an inter nal self resett...

Страница 41: ...displayed and the event is identified as a Major or Minor Alarm A brief description of the alarm is also provided If more than one alarm exists the word MORE appears at the bottom of the screen To view additional alarms press Major Alarms vs Minor Alarms Major Alarms report serious conditions that generally indicate a hard ware failure or other abnormal condition that prevents or seriously hampers...

Страница 42: ...e internal microcontroller was unable to properly program the system to the appropriate EEPROM defaults A hardware problem might exist 11 Not used 12 Major Receiver time out No data received within the specified receiver time out time 13 15 Not used 16 Minor Not used 17 Minor A data parity fault is detected on the DATA INTERFACE connector This usually indicates a parity setting mismatch between th...

Страница 43: ... dBm 9 kHz to 1 GHz 47 dBm 1 GHz to 12 75 GHz Bandwidth MDS x710A M T 12 5 kHz MDS x710C 25 kHz TRANSMITTER Modulation Type Binary CPFSK Carrier Power 0 1 W to 5 W Carrier Power Accuracy 1 5 dB Transmit Attack Time 5 ms maximum Transmit Release Time 5 ms maximum Duty Cycle Continuous Output Impedance 50 Frequency Stability 1 5 ppm Channel Spacing MDS x710A M T 12 5 kHz MDS x710C 25 kHz Adjacent Ch...

Страница 44: ...rature Range 30 to 60 degrees C 22 F to 140 F Weight 1 0 kilograms Case Die cast Aluminum DIAGNOSTICS INTERFACE Signalling Standard RS 232 Connector DIAG RJ 11 Dedicated DATA INTERFACE DB 25 Alternate See Performing Network Wide Remote Diagnostics on Page 37 I O Devices GE MDS Hand Held Terminal PC with GE MDS software or other Terminal Communications program 6 2 Helical Filter Adjustment If the f...

Страница 45: ...t on Page 14 5 With a non metallic adjustment tool adjust each section of the helical filters for maximum RSSI Re install the cover to the trans ceiver Invisible place holder Figure 12 Helical Filter Locations 6 3 Performing Network Wide Remote Diagnostics Diagnostics data from a remote radio can be obtained by connecting a laptop or personal computer running GE MDS InSite NMS software to any radi...

Страница 46: ...n of remote diagnostics can be found in GE MDS Network Wide Diagnostics System Handbook See the handbook for more information about the basic diagnostic procedures outlined below 1 Program one radio in the network as the root radio by entering the DTYPE ROOT command at the radio 2 At the root radio use the DLINK ON and DLINK baud rate commands to configure the diagnostic link protocol on the RJ 11...

Страница 47: ... MDS InSite User s Guide for instructions 6 4 User Programmable Interface Output Functions You can manually activate two pins of the DATA INTERFACE using GE MDS InSite NMS software These two outputs 1 Pin 22 and 2 Pin 15 can be connected to compatible user provided data devices The pins provide either a logic high or low depending on the last com mand from the USER I O SETTINGS in the Network Wide...

Страница 48: ...tware when new fea tures become available from GE MDS Contact GE MDS for ordering information or download new radio software from www gemds com To connect a PC to the radio s DIAG port an RJ 11 to DB 9 adapter MDS P N 03 3246A01 is required If desired an adapter cable can be made using the information shown in Figure 14 Using the Radio Configuration software select RADIO SOFTWARE UPGRADE under the...

Страница 49: ...onnel at the Master Station and the Remote Station sites to coordinate their activities An optional external orderwire module from GE MDS P N 12 1297A01 is available that can be inserted between the radio s DATA INTERFACE and the user s data communication device Invisible place holder Figure 16 Orderwire Adapter Module MDS P N 12 1307A01 Installation Install the Orderwire O W Module between the ra...

Страница 50: ...cuit and interrupt the payload data Operation To operate the orderwire activate the handset PTT or VOX This keys the transmitter and passes the audio over the network to the handset of the Master Station Only one person can speak at a time simplex In noisy locations it might be necessary to cover the handset mouthpiece to prevent accidental keying of the transmitter NOTE When the transmitter is ke...

Страница 51: ... 40mW 5 125 32mW 6 115 25mW 7 100 20mW 8 090 16mW 9 080 125mW 10 071 10mW 11 064 12 058 13 050 14 045 15 040 16 0355 dBm mV Po 17 31 5 18 28 5 19 25 1 20 22 5 01mW 21 20 0 22 17 9 23 15 9 24 14 1 25 12 8 26 11 5 27 10 0 28 8 9 29 8 0 30 7 1 001mW 31 6 25 32 5 8 33 5 0 34 4 5 35 4 0 36 3 5 37 3 2 38 2 85 39 2 5 40 2 25 1µW 41 2 0 42 1 8 43 1 6 44 1 4 45 1 25 46 1 18 47 1 00 48 0 90 dBm mV Po 49 0 8...

Страница 52: ...ital data often represented by a one or a zero Eight bits plus start stop and parity bits usually comprise a byte Bits per second See BPS BPS Bits per second A measure of the information transfer rate of digital data across a communication channel Byte A string of digital data usually made up of eight data bits and start stop and parity bits Decibel dB A measure computed from the ratio between two...

Страница 53: ...eiver feature used to prevent data buffer overruns when handling high speed data from the RTU or PLC When the buffer approaches overflow the radio drops the clear to send CTS line which instructs the RTU or PLC to delay further transmis sion until CTS again returns to the high state Host Computer The computer installed at the master station site which controls the collection of data from one or mo...

Страница 54: ... to a remote radio PLC Programmable Logic Controller A dedicated microprocessor configured for a specific application with discrete inputs and outputs It can serve as a host or as an RTU Programmable Logic Controller See PLC Remote Station A radio in a network that communicates with an associated master station Remote Terminal Unit See RTU Redundant Operation A station arrangement where two transc...

Страница 55: ...MDS 05 3305A01 Rev E MDS 4710 9710 Technical Manual 47 NOTES ...

Страница 56: ...48 MDS 4710 9710 Technical Manual MDS 05 3305A01 Rev E ...

Страница 57: ...elps expedite the repair so that the equipment can be repaired and returned to you as quickly as possible Please be sure to include the SRO number on the outside of the shipping box and on any corre spondence relating to the repair No equipment will be accepted for repair without an SRO number SRO numbers are issued online at www gemds com support product sro Your number will be issued immediately...

Страница 58: ...GE MDS LLC Rochester NY 14620 General Business 1 585 242 9600 FAX 1 585 242 9620 www gemds com 175 Science Parkway ...

Страница 59: ...programmed settings 26 entering on Hand Held Terminal HHT 17 Hand Held Terminal HHT 17 HREV display hardware revision level 27 INIT reinitialize radio to factory defaults 27 INIT xx10 restore standard transceiver defaults 27 INIT xx20 configure radio for use with P 20 chassis 27 KEY activate transmitter 28 Keyboard 17 MODEL display radio model number code 28 MODEM set modem speed 28 OWM set displa...

Страница 60: ...tions 36 Equalization defined 45 Error Messages 19 Error messages 19 access denied 19 command failed 19 EEPROM failure 19 incorrect entry 19 not available 19 not programmed 19 text too long 19 unknown command 19 Event Codes 33 Definitions 34 F Fade margin defined 45 Feedlines 9 Filter helical adjustment 36 Frame defined 45 Frequency adjusting helical filter when changed 36 setting See TX and RX co...

Страница 61: ...ent specifications for 36 Orderwire Module 41 Output 9 9 Vdc regulated pinout Pin 19 12 OWM command 28 OWN command 28 Owner s message set display See OWM command Owner s name set display See OWN command P Passive messaging defined 46 Payload data defined 46 Pinouts on data interface 11 PLC Programmable Logic Controller defined 46 Point to multipoint defined 46 system 2 Point to point link illustra...

Страница 62: ...y revision level 31 upgrades S28 files 41 upgrading 40 used for diagnostics and programming 15 Specifications diagnostics interface 36 environment 36 power 36 receiver 36 receiver system 35 transceiver 35 36 transmitter 35 transmitter system 35 SREV command 31 Standing Wave Ratio See SWR 46 STAT command 31 Supervisory Control And Data Acquisition See SCADA 46 Switched Carrier 3 SWR Standing Wave R...

Страница 63: ...elps expedite the repair so that the equipment can be repaired and returned to you as quickly as possible Please be sure to include the SRO number on the outside of the shipping box and on any corre spondence relating to the repair No equipment will be accepted for repair without an SRO number SRO numbers are issued online at www gemds com support product sro Your number will be issued immediately...

Страница 64: ...GE MDS LLC Rochester NY 14620 General Business 1 585 242 9600 FAX 1 585 242 9620 www gemds com 175 Science Parkway ...

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