Extron-electronics Matrix 12800 Series User Guide Manual de usuario

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Indice de contenidos

Pagina 1 - Matrix 12800 Series

Matrix 12800 SeriesMatrix 12800 Wideband, Video, Sync, and Audio Matrix Switchers68-556-01 Rev. C10 11

Pagina 2 - Precautions

1-3Matrix 12800 Switchers • IntroductionPRELIMINARYEXT. FDDMOUSEK/BNETPRNAC 100V-230VINPUTDIOCOM4COM3VGACOM2COM1IoDISCONNECT BOTH POWER CORDS BEFORE

Pagina 3 - FCC Class A Notice

6-3Matrix 12800 Switchers • Upgrades and Maintenance PRELIMINARYCloing the witcher1. If the door was removed, replace the door by lifting it above

Pagina 4

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-4PRELIMINARYReoving and Intalling the Fan AeblThefourfanso

Pagina 5

6-5Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARYPRIMARY AREDUNDANT A ON = GOODOFF = FAILED2 LED's : ON = GOODOFF = FAILED2 LED&a

Pagina 6

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-6PRELIMINARYReoving and Intalling the Power Suppl ModuleReoving

Pagina 7

6-7Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARY4. If a replacement power supply is not being installed immediately, close the fan as

Pagina 8 - Chapter One

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-8PRELIMINARYReplacing the FueThe primary and redundant AC power ci

Pagina 9

6-9Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARYReoving and Cleaning the FilterC The filter can be removed for cleaning without power

Pagina 10 - PRELIMINARY

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-10PRELIMINARYSetting the DIP SwitcheSwapping the erial port proto

Pagina 11

6-11Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARYChanging the erial port baud rateN If this BME is equipped with a redundant control

Pagina 12

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-12PRELIMINARYChanging the nc terinationIn a sync BME, the first e

Pagina 13

Introduction, cont’dMatrix 12800 Switchers • Introduction1-4PRELIMINARYFeatureInput and output connectors — All connectors are clearly labeled as eit

Pagina 14

6-13Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARYReoving and Intalling the Controller Card and Replacing the FirwareReoving the pr

Pagina 15

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-14PRELIMINARY4. Slide the card out of the cardcage.5. Place the r

Pagina 16 - Chapter Two

6-15Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARY3. For IC U6 — Use a PLCC IC puller to remove the existing firmware IC. Squeeze the

Pagina 17

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-16PRELIMINARYReoving and Intalling the I/O Card and Setting the A

Pagina 18

6-17Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARYFrontWideband and low resolution video cardsVideo Outputs 65-80GreenRedVideo Outputs

Pagina 19

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-18PRELIMINARYReoving the I/O cardRemove I/O cards as follows:1. O

Pagina 20

6-19Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARYSetting the default audio gainBy default, the audio gain of each output is set to 0 d

Pagina 21

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-20PRELIMINARY3. Locate the jumper block that corresponds to the ou

Pagina 22

6-21Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARY7. Close the I/O cardcage door and turn the left and right knurled knobs ¼-turn cloc

Pagina 23

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-22PRELIMINARYController cardThe controller cards have a green LED

Pagina 24

1-5Matrix 12800 Switchers • IntroductionPRELIMINARYOperational flexibility — Operations such as input/output selection, setting of presets, and adjust

Pagina 25

6-23Matrix 12800 Switchers • Upgrades and MaintenancePRELIMINARYInput/output cardThe input and output cards have green LEDs and red LEDs that are vi

Pagina 26

Upgrade and Maintenance, cont’dMatrix 12800 Switchers • Upgrades and Maintenance6-24PRELIMINARY

Pagina 27

PRELIMINARYMatrix 12800 SwitchersAAppendix AEthernet ConnectionEthernet LinkSubnetting — A Primer

Pagina 28

Matrix 12800 Switchers • Ethernet ConnectionA-2Ethernet ConnectionPRELIMINARYEthernet LinkThe rear panel Ethernet connector on the switcher can be con

Pagina 29

A-3Matrix 12800 Switchers • Ethernet Connection PRELIMINARYPinging to deterine Matrix IP AddreThe Microsoft® Ping utility is available at the DOS p

Pagina 30

Ethernet Connection, cont’dMatrix 12800 Switchers • Ethernet ConnectionA-4PRELIMINARYConnecting a a Telnet clientThe Microsoft Telnet utility is avai

Pagina 31

A-5Matrix 12800 Switchers • Ethernet ConnectionPRELIMINARYEscape character and Esc keyWhen Telnet is first started, the utility advises that the Escap

Pagina 32

Ethernet Connection, cont’dMatrix 12800 Switchers • Ethernet ConnectionA-6PRELIMINARYSubnetting — A PrierIt is not the purpose of this manual to desc

Pagina 33

A-7Matrix 12800 Switchers • Ethernet ConnectionPRELIMINARYDeterining whether device are on the ae ubnetTo determine the subnet, the IP address o

Pagina 34 - Chapter Three

Ethernet Connection, cont’dMatrix 12800 Switchers • Ethernet ConnectionA-8PRELIMINARY

Pagina 35

Introduction, cont’dMatrix 12800 Switchers • Introduction1-6PRELIMINARYOperational reliability — The Matrix 12800 can support round-the-clock operatio

Pagina 36

PRELIMINARYMatrix 12800 SwitchersBAppendix BReference InforationSpecificationsPart Numbers and Accessories

Pagina 37

Matrix 12800 Switchers • Reference InformationB-2Reference InforationPRELIMINARYSpecicationVideo— wideband/video BMERouting ...

Pagina 38

B-3Matrix 12800 Switchers • Reference Information PRELIMINARYInput impedance ... Inputs 1 - 32: 510 ohms or 75 ohms, switchab

Pagina 39

Reference Inforation, cont’dMatrix 12800 Switchers • Reference InformationB-4PRELIMINARYGeneralPower* ...

Pagina 40

B-5Matrix 12800 Switchers • Reference InformationPRELIMINARYPart Nuber and AcceorieMatrix 12800 BMECall the Extron S3 Sales & Technical Sup

Pagina 41

Reference Inforation, cont’dMatrix 12800 Switchers • Reference InformationB-6PRELIMINARYTerination tool and connector Part nuberCTU 300 universal

Pagina 42

Extron WarrantyExtron Electronics warrants this product against defects in materials and workmanship for a period of three years from the date of purc

Pagina 43

Extron USA - WestHeadquarters+800.633.9876Inside USA/Canada Only+1.714.491.1500FAX:+1.714.491.1517Extron USA - East+800.633.9876Inside USA/Canada Only

Pagina 44

1-7Matrix 12800 Switchers • IntroductionPRELIMINARY• Dual redundant, hot swappable cooling fans — Four cooling fans are provided for ventilation and

Pagina 45

Introduction, cont’dMatrix 12800 Switchers • Introduction1-8PRELIMINARYDefinitionsThe following terms apply to Extron Matrix Switchers, and are used th

Pagina 46

PRELIMINARYMatrix 12800 Switchers2Chapter TwoIntallation Installation OverviewRack Mounting the SwitcherRear Panel Connections and SettingsOther Sett

Pagina 47

Matrix 12800 Switchers • Installation2-2IntallationPRELIMINARYIntallation OverviewThe Matrix 12800 BMEs that make up a Matrix 12800 system can be in

Pagina 48

2-3Matrix 12800 Switchers • Installation PRELIMINARYRack Mounting the SwitcherThe Matrix 12800 sync, wideband video, video, and audio BMEs are rack-mo

Pagina 49

Intallation, cont’dMatrix 12800 Switchers • Installation2-4PRELIMINARYRear Panel Connection and SettingAll connectors and switches (with the except

Pagina 50

This symbol is intended to alert the user of important operating and maintenance (servicing) instructions in the literature provided with the equipmen

Pagina 51

2-5Matrix 12800 Switchers • InstallationPRELIMINARYk Balanced and unbalanced audio input connectors — See page 2-13.l Audio outputs connectors — Se

Pagina 52

Intallation, cont’dMatrix 12800 Switchers • Installation2-6PRELIMINARYb BME COMM interconnect ports — If the Matrix 12800 system consists of more th

Pagina 53

2-7Matrix 12800 Switchers • InstallationPRELIMINARYSerial portc Primary and Secondary RS-232/RS-422 ports — For systems consisting of a single swit

Pagina 54

Intallation, cont’dMatrix 12800 Switchers • Installation2-8PRELIMINARYGroundd Ground terminal — If the power outlets do not provide connections to t

Pagina 55

2-9Matrix 12800 Switchers • InstallationPRELIMINARYf Primary and Redundant AC Power Input switches — For BME 0 to recognize all of the BMEs in the d

Pagina 56

Intallation, cont’dMatrix 12800 Switchers • Installation2-10PRELIMINARYVirtualization/Control SoftwareThe Extron-supplied Matrix 12800 System Virtual

Pagina 57

2-11Matrix 12800 Switchers • InstallationPRELIMINARY4. Follow the on-screen instructions. By default, the installation of the Matrix Switchers Cont

Pagina 58

Intallation, cont’dMatrix 12800 Switchers • Installation2-12PRELIMINARYPot-Virtualization operationWideband video, low reolution video, and nc c

Pagina 59

2-13Matrix 12800 Switchers • InstallationPRELIMINARYN For audio inputs and outputs, the length of exposed wires is critical. The ideal length is 3/

Pagina 60

Intallation, cont’dMatrix 12800 Switchers • Installation2-14PRELIMINARYl Audio outputs connectors — These 3.5 mm, 5-pole captive screw connectors ou

Pagina 61

FCC Class A NoticeThis equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rul

Pagina 62

2-15Matrix 12800 Switchers • InstallationPRELIMINARYo Ethernet port — For systems consisting of a single switcher or for BME 0 on a multi-BME system

Pagina 63

Intallation, cont’dMatrix 12800 Switchers • Installation2-16PRELIMINARYA cable that is wired as T568A at one endand T568B at the other (Tx and Rx pai

Pagina 64

2-17Matrix 12800 Switchers • InstallationPRELIMINARYFigure 2-17 shows another configuration, in which the timing source passes through three video cam

Pagina 65

Intallation, cont’dMatrix 12800 Switchers • Installation2-18PRELIMINARYOther SettingSerial port protocol witcheThe controller card has a DIP switc

Pagina 66 - Chapter Four

PRELIMINARYMatrix 12800 Switchers3Chapter ThreeVirtualization/Control Software Explaining Virtual I/O SwitchingVirtualization/Control ProgramSpecial C

Pagina 67

Matrix 12800 Switchers • Virtualization/Control Software3-2Virtualization/Control SoftwarePRELIMINARYExplaining Virtual I/O SwitchingA Matrix 12800 sy

Pagina 68

3-3Matrix 12800 Switchers • Virtualization/Control Software PRELIMINARYThe largest possible system consists of three 128 x 128 video BMEs, two 128 x 1

Pagina 69

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-4PRELIMINARYVirtualization/Control PrograThe Extron-

Pagina 70

3-5Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYCreating a virtual I/O witching te (ap)The following detailed example use

Pagina 71

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-6PRELIMINARY After you select the Comm port and clic

Pagina 72

iMatrix 12800 Switchers • Table of ContentsPRELIMINARYTable of ContentsChapter One • Introduction ...

Pagina 73

3-7Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARY4. On the menu bar, click System-Config to show the Virtual Map screen (figure

Pagina 74

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-8PRELIMINARY5. On the menu bar, click Configure >

Pagina 75 - Additional

3-9Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYa. If a sync BME was found, you can specify, in the Sync Config box, whether th

Pagina 76

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-10PRELIMINARY10. If desired, on the Virtual Map scre

Pagina 77

3-11Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYFigure 3-6 — Virtual map and list fields of Virtual Map screenMap an unused con

Pagina 78

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-12PRELIMINARY4. When you are finished editing the vir

Pagina 79

3-13Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYN If you clicked Emulate to create a program for a system in advance without

Pagina 80

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-14PRELIMINARYReote controlling the Matrix 12800 t

Pagina 81

3-15Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYTiesTies appear as solid lines in various colors on main screen of the Virtual

Pagina 82

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-16PRELIMINARYPresetsAfter you have created all of the

Pagina 83

Table of Content, cont’dMatrix 12800 Switchers • Table of ContentsiiPRELIMINARYProgramming the matrix offline (emulate mode) ...

Pagina 84 - Chapter Five

3-17Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYIcon and captionFor your convenience, you can assign a device icon, a name,

Pagina 85 - Web Operation

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-18PRELIMINARYPrograing the atrix ofine (eulate 

Pagina 86

3-19Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARY5. If you have not virtualized the system represented by your startup file, th

Pagina 87

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-20PRELIMINARYSaving and retoring atrix ettingIn o

Pagina 88

3-21Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYCreating progra bte tringThe Matrix 12800 system can be controlled and pro

Pagina 89

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-22PRELIMINARYLogging on to the witcher via the Ether

Pagina 90

3-23Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYEthernet protocol ettingThe IP settings/options screen (figure 3-16) provides

Pagina 91

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-24PRELIMINARYAddress and Name eldsThe Matrix IP Addr

Pagina 92

3-25Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYDate and Time (GMT) eldsThe Date field displays the current date in the Greenw

Pagina 93

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-26PRELIMINARYEdit any of these password fields as foll

Pagina 94

iiiMatrix 12800 Switchers • Table of ContentsPRELIMINARYConguration Tab ...

Pagina 95

3-27Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYWindow button and drop boxeThe buttons and drop boxes on the right side of

Pagina 96

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-28PRELIMINARYTools menu Edit/View Config — Displays t

Pagina 97

3-29Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYPreferences menu Immediate Changes — Causes changes to take effect immediately

Pagina 98 - Chapter 6

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-30PRELIMINARYTies as Crosspoints — Displays ties as a

Pagina 99

3-31Matrix 12800 Switchers • Virtualization/Control SoftwarePRELIMINARYSpecial CharacterCertain characters are reserved for specific functions. The

Pagina 100 - WIDEBAND VIDEO

Virtualization/Control Software, cont’dMatrix 12800 Switchers • Virtualization/Control Software3-32PRELIMINARY

Pagina 101

PRELIMINARYMatrix 12800 Switchers4Chapter FourPrograing GuideRS-232/RS-422 PortsEthernet (LAN) PortHost-to-Switcher InstructionsSwitcher-Initiated M

Pagina 102 - POW E R S U P PLY A

Matrix 12800 Switchers • Programming Guide4-2Prograing GuidePRELIMINARYRS-232/RS-422 PortThe rear panel RS-232/RS-422 connectors (figure 4-1) of the

Pagina 103

4-3Matrix 12800 Switchers • Programming Guide PRELIMINARYEthernet (LAN) PortThe rear panel Ethernet connector (figure 4-2) on the matrix switcher BME 0

Pagina 104

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-4PRELIMINARYEtablihing a connectionEstablish a network connection to BME 0 as f

Pagina 105

Table of Content, cont’dMatrix 12800 Switchers • Table of ContentsivPRELIMINARYReoving and Intalling the I/O Card and Setting the Audio Gain ...

Pagina 106

4-5Matrix 12800 Switchers • Programming GuidePRELIMINARYSwitcher-Initiated MeageWhen a local event such as a power-up occurs, the switcher respond

Pagina 107 - Setting the DIP Switche

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-6PRELIMINARYUing the Coand and Repone TableThe command and response tables

Pagina 108 - 3 4

4-7Matrix 12800 Switchers • Programming GuidePRELIMINARYX1( = Signal type:dengissanU oiduaoN oeretS onomtfeLdengissanU00BGR101112SBGR202122VHBGR303

Pagina 109 - Switches

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-8PRELIMINARYCoand and repone table for SIS coandCoand ASCII coand(hot

Pagina 110 - Replacing the Firware

4-9Matrix 12800 Switchers • Programming GuidePRELIMINARYCoand ASCII coand(hot to witcher)Response(witcher to hot)Additional decriptionRead t

Pagina 111

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-10PRELIMINARYCoand ASCII coand(hot to witcher)Response(witcher to hot)Add

Pagina 112

4-11Matrix 12800 Switchers • Programming GuidePRELIMINARYN X1) = Room number 00 – 32 X1! = Name Up to 12 alphanumeric characters X@ = Output numbe

Pagina 113 - Sync cards

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-12PRELIMINARYCoand ASCII coand(hot to witcher)Response(witcher to hot)Add

Pagina 114

4-13Matrix 12800 Switchers • Programming GuidePRELIMINARYCoand ASCII coand(hot to witcher)Response(witcher to hot)Additional decriptionView

Pagina 115

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-14PRELIMINARYCoand ASCII coand(hot to witcher)Response(witcher to hot)Add

Pagina 116

PRELIMINARYMatrix 12800 Switchers1Chapter OneIntroductionAbout the Matrix 12800 SwitchersFeaturesDefinitions

Pagina 117

4-15Matrix 12800 Switchers • Programming GuidePRELIMINARYCoand ASCII coand(hot to witcher)Response(witcher to hot)Additional decriptionReset

Pagina 118

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-16PRELIMINARYCoand ASCII coand(hot to witcher)Response(witcher to hot)Add

Pagina 119

4-17Matrix 12800 Switchers • Programming GuidePRELIMINARYCoand and repone table for IP SIS coandSbol denitionX4) = Matrix name (Up to 2

Pagina 120

Prograing Guide, cont’dMatrix 12800 Switchers • Programming Guide4-18PRELIMINARYCoand and repone table for IP SIS coandCoand ASCII coand(

Pagina 121

PRELIMINARYMatrix 12800 Switchers5Chapter FiveWeb OperationDownload the Startup PageStatus TabConfiguration TabFile Management TabControl Tab

Pagina 122 - Appendix A

Matrix 12800 Switchers • Web Operations5-2Web OperationPRELIMINARYThe Matrix 12800 can be controlled and operated through the Ethernet port on BME 0,

Pagina 123

5-3Matrix 12800 Switchers • Web Operations PRELIMINARY7. The switcher checks several possibilities, in the following order, and then responds accordi

Pagina 124

Web Operation, cont’dMatrix 12800 Switchers • Web Operations5-4PRELIMINARYBME Statu pageTo observe more status details for a specific BME, from the S

Pagina 125

5-5Matrix 12800 Switchers • Web OperationsPRELIMINARYDSVP pageTo observe the Digital Sync Validation Processing (DSVP) for an input, from the System

Pagina 126

Web Operation, cont’dMatrix 12800 Switchers • Web Operations5-6PRELIMINARYAdinitration eld• EthernetconnectiontotheMatrixswitcher,eithere

Pagina 127

Matrix 12800 Switchers • Introduction1-2IntroductionPRELIMINARYAbout the Matrix 12800 SwitcherThe Extron Matrix 12800 Series of switchers is a family

Pagina 128

5-7Matrix 12800 Switchers • Web OperationsPRELIMINARYEail Setting pageThe Email Settings page (figure 5-7) can be reached by clicking on the Email S

Pagina 129

Web Operation, cont’dMatrix 12800 Switchers • Web Operations5-8PRELIMINARYEail Addre eldThe nine Email Address fields identify the e-mail address

Pagina 130 - Appendix B

5-9Matrix 12800 Switchers • Web OperationsPRELIMINARYControl TabSet and View Tie pageYou can create ties on the Set and View Ties page (figure 5-9).

Pagina 131

Web Operation, cont’dMatrix 12800 Switchers • Web Operations5-10PRELIMINARYCreate a tie as follows:1. Click the Video Only, Audio Only, or Video &am

Pagina 132

5-11Matrix 12800 Switchers • Web OperationsPRELIMINARYChanging the input gain and attenuation (te with audio BME)Users can set the level of aud

Pagina 133

Web Operation, cont’dMatrix 12800 Switchers • Web Operations5-12PRELIMINARYMuting and unuting one or all outputMute one or all outputs as follows:1

Pagina 134

5-13Matrix 12800 Switchers • Web OperationsPRELIMINARY4. Click the RGB delay drop box. A drop-down scroll box appears (figure 5-15). Figure 5-15 — R

Pagina 135

Web Operation, cont’dMatrix 12800 Switchers • Web Operations5-14PRELIMINARYSaving a preetSave the current configuration (configuration 0) as a preset

Pagina 136 - Extron Warranty

PRELIMINARYMatrix 12800 Switchers6Chapter 6Upgrade and MaintenanceOpening and Closing the Matrix SwitcherRemoving and Installing the Fan AssemblyRemo

Pagina 137

Matrix 12800 Switchers • Upgrades and Maintenance6-2Upgrade and MaintenancePRELIMINARYN For proper cooling and air flow, all access doors should be c

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