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54

SD Series Technical Manual

MDS 05-4846A01, Rev. H

Push-To-Talk Delay (ms)

—Allows programming a brief time delay 

after a keying event, which must expire before the radio is 
allowed to transmit. The allowable range is 0 to 255 ms, with the 
default being 

0

.

Clear-To-Send Delay (ms)

—Allows programming a brief time delay 

between when an RTS (ready-to-send) signal is received and 
when the CTS (clear-to-send) signal is returned. The allowable 
range is 0 to 255 ms, and the default is 

0

Automatic Freq. Correction

—Automatic Frequency Correction 

(AFC), is used to counteract the slight RF frequency drift that 
may occur over time or through wide swings of ambient temper-
ature. 

Switched Carrier (B Modems)

—In some networks, the Master unit is 

not keyed continuously (Ckeyed), and transmits only when it has 
data to send to Remotes. This is known as Switched Carrier oper-
ation. The Switched Carrier setting is only for use on radio 
modems with “B” suffixes (for compatibility with MDS x710 
radios). In such networks, the Remote radios should have the 

Switched Carrier

 setting turned 

ON

. The default setting is 

OFF

 which 

assumes B-modem operation with a continuously keyed Master. 
Ckey Operation only applies to Master units operating in 
full-duplex mode only. Master units in B-modem networks will 
have SWC set to 

ON

 regardless of Ckey being on or off.

RX Signal Attenuation

—This setting is intended for use in strong sig-

nal environments (typically -70 dBm or stronger). When enabled 
the radio will tolerate very strong signals of -20 dBm or stronger. 
Note that RX Signal Attenuation will reduce sensitivity by a few 
dB, so it should be disabled for maximum sensitivity when work-
ing with extremely weak signals.

Force DCD to Asserted

—Some systems require a constant Data Car-

rier Detect (DCD) signal. This setting allows the radio to be con-
figured to provide a DCD signal without the need for special 
cabling.

Data Key Hold Time-out

 

(chars)

— For networks with the demand for a 

higher modem speed then the baud rate, this parameter can be 
adjusted from 1 to 10 characters. This parameter gives the overall 
network better performance by preventing frequent key-up and 
key-down sequences between characters. This only applies to net-
works with all-SDx radios. The default setting is 

2

 characters.

Содержание MDS SD Series

Страница 1: ...l MDS 05 4846A01 Rev H November 2013 Covering ES SS Units with Firmware Version 5 x Applies to all models EXCEPT those operated in x710 Mode For x710 mode operation refer to Publication 05 4670A01 MDS...

Страница 2: ...Quick Start instructions for this product are contained in publication 05 4847A01 All GE MDS manuals and updates are available online at www gemds com...

Страница 3: ...ies and Spares 8 Protected Network Station 8 Dual Protected Configurations 9 3 0 TYPICAL APPLICATIONS 11 3 1 Operating Parameters 11 3 2 Example Systems 12 Multiple Address Systems MAS 12 Point to Poi...

Страница 4: ...6 1 Navigating the Screens 36 Overview Screen 37 6 2 Management Tasks 38 6 3 Configuration Screens 43 Radio 43 Store and Forward Operation 49 Features 55 Understanding the Use of Virtual Radio Channe...

Страница 5: ...n All other trademarks and product names are the property of their respective owners RF Safety Notice English and French Concentrated energy from a directional antenna may pose a health hazard to huma...

Страница 6: ...y of potential injury When servicing radios all workplace regulations and other applicable standards for live electrical work should be followed to ensure personal safety Manual Revision and Accuracy...

Страница 7: ...Locations Such locations are defined in Article 500 of the National Fire Protection Association NFPA pub lication NFPA 70 otherwise known as the National Electrical Code The transceiver has been rec o...

Страница 8: ...or other materials provided with the distri bution 3 Neither the name s of the above listed copyright holder s nor the names of its contributors may be used to endorse or promote products derived from...

Страница 9: ...er product information Invisible place holder Figure 1 MDS SD Series Transceiver 1 1 Conventions Used in This Manual Software Device Manager Notations This product is designed for software control via...

Страница 10: ...es in this Release The SD transceiver has been updated to include the following function ality in the latest release of the product Peer to Peer capability see Page 6 and Page 67 Internal MODBUS TCP t...

Страница 11: ...processing DSP technology and a fully digital transmit and receive IF chain to provide robust communica tions even under adverse conditions DSP technology also helps elimi nate the effects of compone...

Страница 12: ...ce risk from other users Configurable via software as a Remote or an AP unit Low power sleep mode ideal for battery powered solar sites Virtual Radio Channels VRC support multiple polling applica tion...

Страница 13: ...he radio supports port based VLAN at the Ethernet interface and over the air in accordance with the IEEE 802 1Q standard When VLAN Mode is enabled the wireless ports of both AP and Remote radios act a...

Страница 14: ...SysID offers nine unique choices including the default value of NONE Master and Remote radios in the same net work must use the same value To use this feature a network must consist of all SDx radios...

Страница 15: ...for mixed net works containing SD and older MDS x710 radios It allows currently deployed x710 networks to add support for Ethernet data at either the Master or Remote radios Note that Ethernet Bridgin...

Страница 16: ...e 1 Accessories Spare Items Accessory Description Part Number Retrofit Kit Digital Contains adapters and connectors needed to facilitate the replacement of an existing MDS x710A C M digital transceive...

Страница 17: ...e requires bandpass duplexers due to the presence of co located antennas When streaming Repeater operation is desired using dedicated Transmit and Receive transceivers To improve performance in networ...

Страница 18: ...o SDxP chassis described earlier with appro priate interconnect cabling between the units The radios in one SDxP are configured with the transmit frequency and the radios in the other are configured w...

Страница 19: ...uit the requirements of a particular application Table 2 provides a summary of common applications protocols and radio modes used Refer to the table to determine what applications can be supported and...

Страница 20: ...and remote terminal units RTUs or other data collection devices in the field Often such a system is used to carry telemetry data to and from widely separated remote radios Typical MAS applications ma...

Страница 21: ...nabling Ethernet Bridging capabilities Figure 7 shows an overview of such a system Note that the Remote radio on the right side of the illustration uses a serial connection The radio s Terminal Server...

Страница 22: ...n the case of the Remote shown on the lower right side of the figure two RTUs are co located but responding to different host computers and handling entirely different data streams The radio eliminate...

Страница 23: ...of protocols that implement push com munication Note that both the serial and Ethernet versions of DNP3 support push communication IP Polling of Serial Remotes The transceiver is ideal for use in sys...

Страница 24: ...Serial Ports on One Remote In some cases it is necessary to poll more than one RTU at a Remote site Figure 10 shows an example of such a system Here two RTUs are connected to each Remote transceiver...

Страница 25: ...single host polling all units packet or transparent mode is the preferred option even if there are two RTUs connected to a Remote radio Figure 10 IP Polling of Two Serial Ports on One Remote MASTER R...

Страница 26: ...ypical station arrangement The specific details at an instal lation site may vary but there are three main requirements for installing the transceiver in all cases Adequate and stable primary power An...

Страница 27: ...ided with flat mounting brackets attached to the bottom of the radio as shown in Figure 13 An optional 35 mm DIN rail mounting bracket is also available and is described below Invisible place holder F...

Страница 28: ...t shown is for example only and is not an SD Transceiver 4 3 Antennas and Feedlines Antennas The transceiver may be used with a number of different antennas The exact style and gain factor depend on t...

Страница 29: ...minimize signal loss Table 3 Signal Loss in Coaxial Cables at 200 MHz Cable Type 10 Feet 3 Meters 50 Feet 15 Meters 100 Feet 30 5 Meters 200 Feet 61 Meters RG 8A U 0 26 dB 1 27 dB 2 50 dB 5 07 dB 1 2...

Страница 30: ...ower Connector P N 73 1194A39 NOTE The radio is designed for use in negative ground systems only 4 5 Grounding Considerations To minimize the chance of damage to the transceiver and connected equipmen...

Страница 31: ...w pinout data for the Ethernet port The Ethernet interface supports both radio management and payload data transport functions For radio management connecting via a web browser provides enhanced funct...

Страница 32: ...port Figure 18 assigns it for management or diagnostics of the radio via a serial connec tion to a PC COM1 may be used to set basic parameters such as output power modem type and operating frequency o...

Страница 33: ...rating in RS 422 mode RS 485 must be selected in the menu and the pin descriptions wiring arrangements shown in Table 9 apply NOTE The radio is hard wired as a DCE device RXD TXD GND 2 3 5 RXD TXD GND...

Страница 34: ...after the programmed CTS delay time has elapsed DCE or keys another connected radio when RF data arrives CTS KEY 9 Reserved User I O for special applications Table 9 COM2 Pin Descriptions Radio in RS...

Страница 35: ...data received by the radio and transmitted TXD TXB is positive with respect to the TXD TXA when the line output is a 0 Invisible place holder Figure 21 RS 485 Wiring Arrangements EIA 485 2 WIRE CONNEC...

Страница 36: ...nnect the data equipment Connection may be made using IP Ethernet signaling Serial protocols RS 232 RS 485 or both If an Ethernet device is to be used connect it to the front panel ETHERNET port to th...

Страница 37: ...that works with your PC s browser to pro vide an intuitive web style presentation of all radio information set tings and diagnostics The Device Manager also contains a wizard function to assist in set...

Страница 38: ...ied radio is 192 168 1 1 The user name and password for the radio Check with your Net work Administrator or if a username and password have not been set use the factory defaults of admin for both entr...

Страница 39: ...uencies may not be set when the radio is shipped from the factory depending on ordering options If no frequencies have been set an alarm condition is generated and the PWR LED flashes These will be cl...

Страница 40: ...figuration is now complete Getting an Overview of Radio Settings To get a top level view of the key settings and operating parameters for the radio select Overview and a summary screen will be displa...

Страница 41: ...een may be used to observe RSSI Turn the antenna heading slowly so that the RSSI display can be updated NOTE The RSSI facility limits the maximum displayed signal strength to 60 dBm Signal levels that...

Страница 42: ...cation results with the least number of re transmissions due to errors Inter Packet Gap Settings For radios operating in Packet Mode the inter packet gap is a timing set ting used to delimit a packet...

Страница 43: ...t can take a few minutes before the radio obtains an IP address which will be displayed in the Current IP Address field If DHCP operation is unavailable or is not desired then a static IP address may...

Страница 44: ...a PC to the radio and logging into the Device Manager for basic radio setup including use of the Setup Wizards Figure 25 PC Connection to Radio for Web Management 6 1 Navigating the Screens Upon login...

Страница 45: ...on Printout Option Clicking the Printer friendly configuration label at the bottom of the screen brings up a print ready report that includes not only the Overview screen but all settable items and in...

Страница 46: ...IP Address Serial No Firmware version Run time Alarm presence etc Overview Page 37 View Radio Performance data Power Output Signal to Noise Ratio Received Signal Strength DC Input voltage operating te...

Страница 47: ...matic Frequency Correction AFC setting Configuration Radio Advanced Settings Page 53 View Set Switched Carrier ON OFF setting B Modems Configuration Radio Advanced Settings Page 53 Configure Listen Be...

Страница 48: ...t Password for radio Configuration Security Login Password Page 71 Set Device Security enable disable local login requirement enable disable Telnet access enable disable web access Configuration Secur...

Страница 49: ...eprogram the Transceiver via TFTP transfer Maintenance Status Firmware Utilities TFTP Reprogramming Page 82 Broadcast Remote Configuration settings to all radios in the network Setup Wizards Remote Ma...

Страница 50: ...e reduced size examples Also the parameters and settings shown may differ from those seen in field service conditions Transceiver Maintenance and Diagnostic Tests Cont d View logged Events Maintenance...

Страница 51: ...ns important RF and modem selections for radio operation RF Output Power dBm The RF output power may be set between 20 and 37 dBm 0 1 to 5 watts in 1 dB increments The default setting is 37 dBm Full p...

Страница 52: ...ll flash indi cating that an entry is needed Frequencies must be entered for the radio to operate Consult your station license to determine the authorized frequencies for your system and enter them ex...

Страница 53: ...that proper sys tem design is required Operational Example SDx System Alpha has eight units and SDx System Beta has eight units A user wishes to occupy fre quency 952 1235 MHz on both of these system...

Страница 54: ...o in any way Such fields might be used to identify the network administrator company name and include a site specific message i e Unit 2 at North Tower site Up to 30 alpha numeric characters may be en...

Страница 55: ...and without AES Encryption Transpar ent w AES Encryption requires an all SD radio network User Interface This parameter selects the method of radio manage ment for the Serial Telnet interface It has n...

Страница 56: ...ual character Transparent RX Timeout ms This setting is similar to the timing parameters for COM1 COM2 Inter Packet Gap but it applies to data received over the air It tells the radio how to build an...

Страница 57: ...the Time to Live TTL value the message is discarded This helps prevent stale or old data from being sent over the air Store and Forward Operation Store and Forward SAF operation extends a wireless net...

Страница 58: ...nd Forward exchanges A SAF exchange is defined as any exchange between the Master AP and a Remote through an SAF device In all cases the Master AP still controls the operation of the net work After se...

Страница 59: ...upstream to the Master AP the Master AP is aware of the Remote s path based on the exchange type direct or SAF The Master AP stores this information in a database linked to the Remote s address Future...

Страница 60: ...g Network Wide Remote Diagnostics on Page 93 for details Dlink Status This item is used to enable or disable diagnostics functionality Setting it to ON configures the radio to pass the diagnostic link...

Страница 61: ...ection is OFF no RX time limit RX Time Out Delay min Sets the time delay after which an alarm is issued when no signals have been received The default setting is 0 minutes TX Time Out Status Enables o...

Страница 62: ...ched Carrier setting turned ON The default setting is OFF which assumes B modem operation with a continuously keyed Master Ckey Operation only applies to Master units operating in full duplex mode onl...

Страница 63: ...ic MAC entry in the Bridge route table The parameter can be varied from 0 to 5 minutes Default for this set ting is 5 minutes Lan filter When set as SMART this filter prevents any packets which were t...

Страница 64: ...fea ture since any Telnet or web connections will be lost after it is changed Also configure the appropriate IP and IP2 settings before changing this parameter Data ID Defines the VLAN ID assigned to...

Страница 65: ...requency TX or listen on the radio s receive frequency RX Typically Remote radios are configured to Listen on RX the default selection to avoid colli sions with the Master unit In split frequency oper...

Страница 66: ...effi cient feature that supports Ethernet connectivity with maximum over the air OTA efficiency for UDP and TCP data streams Remote radios receiving the data can then forward this traffic to their se...

Страница 67: ...This feature does not bridge Ethernet networks separated by radios For more information see Ethernet Bridging found on Page 55 in the Bridge Configuration section A broadcast poll response network is...

Страница 68: ...n of the screen prior to any changes being committed This might be useful if one or more settings were inadvertently changed and you wish to return to a known state To restore the prior settings simpl...

Страница 69: ...nal server at the Remotes means that Ethernet data can be delivered to specific devices connected to these radios Terminal Server settings examples and additional ben efits are described in the follow...

Страница 70: ...voided as some are reserved for special applications in data networks TCP Server IP Address IP address of the TCP server being used TCP Server IP Port Port number of the TCP server being used Port num...

Страница 71: ...th the IP address equal to 192 168 1 2 Ethernet Bridge is enabled in all radios Serial Addressability This example shows that it is possible to communicate to specific serial devices e g PC 2 COM1 and...

Страница 72: ...mmit Configuration after the changes are made To test the functionality of the Terminal Server open a HyperTerminal session on PC1 and connect to the Remote 1Terminal Server as shown in Figure 33 Invi...

Страница 73: ...Figure 36 Figure 36 Remote 2 COM2 Port Connection Type hello in the Remote 1 Terminal Server window Note delivery of the message only to the Remote 1 COM2 Port window see Figure 37 Type hi in the Rem...

Страница 74: ...egacy systems or in special use cases The Multihost Settings screen is used only when Packet mode is selected It provides an alternative way to run multiple host applications at the Master unit which...

Страница 75: ...communicate to other enabled Peers Ethernet Rebcast Request RM only Determines if the Remote is allowed to communicate to other enabled Peers Communications Ports COM1 Port Settings Startup Mode The...

Страница 76: ...dio s Terminal Server is enabled or disabled COM2 Port Settings COM2 is the standard port used for connection of serial payload data The COM2 Port Settings screen contains a number of settings that ma...

Страница 77: ...rt No 05 6193A01 more information Term Srvr Status Indicates whether the radio s terminal server is enabled or disabled NOTE The radio can operate in RS 422 mode when RS 485 is selected IP Configurati...

Страница 78: ...hether or not a local log in is required when using the transceiver s menu system The default setting is Local Login Required and is appropriate for most circumstances Setting this parameter to No Loc...

Страница 79: ...the time of installation to one that is known only to the Administrator or authorized user of the system The password should be changed periodically to maintain the best security Passwords are case se...

Страница 80: ...been enabled a valid phrase must also be set Both the sending and receiving station must have the same phrase for communication to occur The phrase must have at least 8 characters maximum of 38 and a...

Страница 81: ...all events stored by the transceiver even if the radio has been power cycled It also shows a running total of the alarms stored Total Event Log Events Displays the number of events that have been log...

Страница 82: ...as booting up the system and re initializing This menu is read only Alarm Signal Configuration This screen contains settings to determine what events are detected and what will be done with them At th...

Страница 83: ...ow it First you must select which specific alarms will result in a signal being produced by the alarm output line To set an alarm message for reporting by the output line you click the check box next...

Страница 84: ...of blocks as applicable depending on the interface selected The display continually refreshes to show the latest information and may be cleared at any time by selecting Clear Module Statistics Reset C...

Страница 85: ...the radio is connected via either DIRECT or through Store and Forward SAF Clear Routes Forces the radio to re learn all actively communicat ing radios in the network Export Routes Send MAC Route Entr...

Страница 86: ...summary of data statistics is displayed on the right side of the screen including transmit receive packet counts total bits and total number of bit errors NOTE No other data traffic should be active w...

Страница 87: ...dio Set to ON to enable the RF keying test OFF to disable it The Commit Configuration button must be clicked to apply the set ting Measured RF Power Provides an indication in dBm of the mea sured powe...

Страница 88: ...nd the radio s PWR LED begins to flash An Alarm Test entry is also made in the Event Log and the external alarm output status is changed In redundant configurations such as SDxP SDxDP SDxDT packaged m...

Страница 89: ...ve as well as the firmware ver sion of each image The information on this screen is read only This section is read only NOTE The latest firmware version for this product can be obtained at www gemds c...

Страница 90: ...the amount of time in seconds that the radio should wait for a TFTP server to respond The default set ting is 20 seconds and will not normally require any change If a change is needed enter a new time...

Страница 91: ...led the newly loaded image will not become valid until the transceiver is rebooted manually Download Delay This field can be used to introduce a time delay when reprogramming begins Typically it is se...

Страница 92: ...ersion of firmware package 2 Image Allows selection of the firmware image to use when rebooting Current active Image Image 1 Image 2 Inactive Image Reboot Initiates reboot of the radio with the select...

Страница 93: ...on to select a configuration file for loading into the transceiver You will receive a browse window to help you locate the file on your computer and upload it to the transceiver TFTP Configuration Fil...

Страница 94: ...re trouble shooting tasks as it allows reverting to a known good configuration of the radio Restore to Factory Defaults Click this button to restore the radio s configuration settings to the factory d...

Страница 95: ...eiver and the connected data equipment correct cable wiring proper data format timing etc Proper programming of the transceiver s operating parameters Table 14 provides suggestions for resolving syste...

Страница 96: ...se Note that access to the unit via Ethernet will not be possible if the port is currently shut down About Auto Power Save This feature enabled by default shuts down the Ethernet port if no connection...

Страница 97: ...th setting and clearing of major minor alarms and status conditions are logged as well as informational events i e remote rebooted repro gramming in process etc Major Alarms vs Minor Alarms Major Alar...

Страница 98: ...odes shown are a subset of a larger pool of codes used for various GE MDS products For this reason the table does not show a sequential listing of all code numbers Only the codes applicable to this pr...

Страница 99: ...nted 024 Minor Not currently implemented 025 Minor Not currently implemented 026 Minor DC input voltage approaching limit If the voltage is too far out of tolerance operation may fail 027 Minor Not cu...

Страница 100: ...60 dBm will appear as 60 dBm Radio operation in strong signal environments Operation with very strong receive signals 60 dBm may require selection of the programmable RX Signal Attenuation feature se...

Страница 101: ...nSite is designed for operation with a serial based COM1 connection unless using a terminal server PulseNET is designed to operate with the radio s Ethernet port Figure 41 shows a sample serial arrang...

Страница 102: ...ot from the drop down list Setting Up Diagnostics The steps below outline the basic procedure of setting up diagnostics for a radio A more detailed description of remote diagnostics can be found in th...

Страница 103: ...or intrusive reprogram ming NOTE Intrusive mode should be used only when the radio channel can be devoted to the reprogramming operation as payload data will be interrupted Passive Non intrusive opera...

Страница 104: ...Table 19 provides suggested settings for performing Broadcast Repro gramming operations based on the type of network employed Each system has unique requirements but experience has shown that these s...

Страница 105: ...es On the Nodes the progress toward completion of reception of reprogramming information is indicated Receiving stations can automatically reboot to the new image after suc cessful reprogramming Alter...

Страница 106: ...vailable during reprogramming at Root radios Stop Remote Reprogramming Terminate remote firmware upgrade for all remote nodes in the network Inactive images on non root radios will be invalid No chang...

Страница 107: ...by manual entry Refer to SD Serial Telnet Management Supplement Part No 05 6193A01 for a summary of text commands Changing COM1 Modes The Device Manager may be used to change the COM1 operating mode b...

Страница 108: ...l MDS 05 4846A01 Rev H November 2013 Covering ES SS Units with Firmware Version 5 x Applies to all models EXCEPT those operated in x710 Mode For x710 mode operation refer to Publication 05 4670A01 MDS...

Страница 109: ...Quick Start instructions for this product are contained in publication 05 4847A01 All GE MDS manuals and updates are available online at www gemds com...

Страница 110: ...The passage of payload data does not inhibit sleep mode Sleep Mode Example This section describes how to implement Sleep Mode in a typical sce nario Before using Sleep Mode the following conditions m...

Страница 111: ...re dependent on the type approval of the radio Consult fac tory for details Occupied Bandwidths SD1 6 25 12 5 25 0 kHz SD2 5 0 6 25 9 0 12 5 25 0 50 0 kHz SD4 6 25 12 5 25 0 kHz SD9 5 0 12 5 25 0 50 0...

Страница 112: ...al 2 5 Amperes maximum 5 Watts RF Output RX Supply Current Typical Operational 125 mA Nominal Sleep 10 mA typical 13 8 Vdc Fuse 5 Ampere internal ENVIRONMENTAL Humidity 95 non condensing Temperature R...

Страница 113: ...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...

Страница 114: ...onnectors for example are subtracted from this figure to calculate the total antenna system gain BER Bit Error Rate Bit The smallest unit of digital data often represented by a one or a zero Eight bit...

Страница 115: ...her messages are handled locally or sent intact over the air Fade Margin The greatest tolerable reduction in average received signal strength expected under most conditions Provides an allowance for r...

Страница 116: ...r Station Radio which is connected to the host computer It is the point at which polling enters the network Multiple Address System See MAS Network Wide Diagnostics An advanced method of controlling a...

Страница 117: ...ed master unit Remote Terminal Unit See RTU Redundant Operation A station arrangement where two transceivers and two power supplies are available for operation with automatic switch over in case of a...

Страница 118: ...lly connected to a PC Terminal Server An available feature on the radio which encapsu lates serial data from the COM1 COM2 ports and sends it over the air as IP packets The data is decapsulated at the...

Страница 119: ...MDS 05 4846A01 Rev H SD Series Technical Manual 109 NOTES...

Страница 120: ...110 SD Series Technical Manual MDS 05 4846A01 Rev H...

Страница 121: ...105 DTE Data Terminal Equipment defined 105 E Environment specifications 102 Equalization defined 105 F Fade margin defined 105 Feedlines 21 Frame defined 105 G Glossary 104 H Half duplex 12 Hardware...

Страница 122: ...isory Control And Data Acquisition defined 107 Signal loss due to coaxial cable length at 960 MHz table 22 Simplex 12 Sleep mode shown by PWR LED status indicator 33 Software diagnostics and control u...

Страница 123: ...equipment is necessary you will be issued a Service Request Order SRO number The SRO number will help expedite the repair so that the equipment can be repaired and returned to you as quickly as possib...

Страница 124: ...GE MDS LLC Rochester NY 14620 Telephone 1 585 242 9600 FAX 1 585 242 9620 www gemds com 175 Science Parkway...

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