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MX250 Hardware Manual i

C o n t e n t s

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2

Product Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3

Documentation Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4

Forms of Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.5

Colophon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.6

1.7

Documentation Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 2

Receiving the Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2

Shipment Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3

In Case of Damage or Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4

Returning Items for Repair or Replacement . . . . . . . . . . . . . . . . . . . . . . . 9

Chapter 3

Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.2

Front Side of MX250. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3

Rear Side of MX250. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4

MX250 Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.5

Console Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Chapter 4

Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.2

Selecting a Site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.4

Electrostatic Discharge (ESD) Precautions . . . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 5

Mounting the MX250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.2

Equipment Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.3

Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.4

Installing Brackets for Cable Management. . . . . . . . . . . . . . . . . . . . . . . . 26

5.5

Installing Mounting Brackets on Chassis . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.6

Installing the Chassis into the Equipment Rack . . . . . . . . . . . . . . . . . . . 29

Chapter 6

Connecting, Wiring, and Configuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.2

Installing Batteries for Real Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.3

Setting the IP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Содержание MX250

Страница 1: ...MX250 Enterprise Media Exchange Manual Part Number 90 18300 Hardware Manual Zultys Technologies 771 Vaqueros Avenue Sunnyvale CA 94085 USA tel 1 408 328 0450 fax 1 408 328 0451 http www zultys com ...

Страница 2: ...gies and all rights are reserved No part of this document may be photocopied reproduced stored in any computer format translated to another language or publicly displayed without the prior written consent of Zultys Technologies The information contained herein has been prepared by Zultys Technologies solely for use by Zultys employees agents and customers Dissemination or use of the information or...

Страница 3: ...ion 11 3 2 Front Side of MX250 11 3 3 Rear Side of MX250 12 3 4 MX250 Circuits 13 3 5 Console Mode 18 Chapter 4 Preparation 21 4 1 Introduction 21 4 2 Selecting a Site 21 4 3 Power Requirements 23 4 4 Electrostatic Discharge ESD Precautions 24 Chapter 5 Mounting the MX250 25 5 1 Introduction 25 5 2 Equipment Rack 25 5 3 Tools Required 25 5 4 Installing Brackets for Cable Management 26 5 5 Installi...

Страница 4: ...ter LEDs 38 7 5 System Shut Down 40 Chapter 8 Maintenance and Use 41 8 1 Introduction 41 8 2 Usage 41 8 3 Servicing 41 8 4 Disposal 41 Appendix A Acronyms 43 Appendix B Glossary 47 Appendix C Regulatory and Safety Compliance 53 C 1 Usage 53 C 2 Safety 53 C 3 Electromagnetic Compatibility EMC Emissions 53 C 4 Electromagnetic Compatibility EMC Immunity 54 C 5 Telecom 54 C 6 FCC Information 54 Index ...

Страница 5: ...lified personnel only Installation by unqualified individuals may result in injury and damage to the MX250 and surrounding equipment Warning This equipment is to be installed and maintained by service personnel only as defined by AS NZS 3260 Clause 1 2 14 3 Service Personnel Warning The MX250 must be installed in a secure location that has access restricted to qualified personnel only Placing the ...

Страница 6: ...s of sales representatives or names of distribution channels Access the Zultys web sites for all further information Zultys is very open about its products and most of the manuals are available on line at http www Zultys com 1 2 Product Function 1 2 1 Interfaces Figure 1 1 shows the available interfaces on the MX250 No of Ports Interface 2 10 100 Ethernet circuits for IP enabled communication devi...

Страница 7: ...page 43 1 3 2 2 Jargon This manual often uses technical terms specific to the industry of telecommunications and data communications Very specialized terms are sparsely used and their meanings are clearly explained where they are used For a complete definition of all unique terms used in this manual see the glossary in appendix B starting on page 47 Interface Supported Protocols T1 1 544 Mb s voic...

Страница 8: ...n 1 4 1 Printed The printed version of this manual is updated as required 1 4 2 PDF This manual is available in PDF format You can download the PDF file from the MX250 web site at http www zultys com You can obtain old versions of the manual that may describe the hardware that you have the manual that was used to produce the most recently printed manual or the latest manual that describes all the ...

Страница 9: ...edback to Technical Publications Department Zultys Technologies 771 Vaqueros Avenue Sunnyvale California 94085 USA techpubs Zultys com Description MX Administrators Manual Using the administration software for configuration and maintenance of the MX250 MXIE User s Manual Complete manual on the configuration and use of the client software for the MX250 MXIE User s Guide Quick reference on the use o...

Страница 10: ...6 MX250 Hardware Manual ...

Страница 11: ...ully Ensure that you do not discard any accessories that may be packaged in the same box as the main unit Take care when handling the MX250 Caution Do not drop or jolt the MX250 The hard disc inside the MX250 is designed for continuous operation but is fragile until installed If you allow the MX250 to receive a hard knock you can cause irreversible damage to the hard disc 2 2 2 Verify Content Upon...

Страница 12: ...Malfunction Notify your Zultys sales or service representative under any of the following conditions the shipping container or any of the contents appear damaged an item is missing there is a discrepancy between the packing slip and the equipment received the equipment does not function correctly Your supplier will arrange for repair or replacement at Zultys discretion In certain cases Zultys may ...

Страница 13: ...f you are returning equipment for service attach a tag or sheet of paper to the equipment giving the following details your company or institution s name address and phone number the main person to contact an alternative contact and their phone numbers if different from the main phone number the return shipping address and any special shipping instructions the model number and serial number of the...

Страница 14: ... back to your facility will be the same method by which you shipped the merchandise to Zultys For example if you shipped merchandise to Zultys by ground shipment Zultys will return the merchandise to you by ground shipment If the merchandise must be repaired and returned to you as soon as possible you must arrange for the merchandise to be shipped to Zultys by overnight shipment 2 4 6 Corresponden...

Страница 15: ...ower LED During normal operation the Power LED indicates the status of ac power and battery applied to the MX250 2 Load LED During normal operation the Load LED indicates system service accesses and storage availability for applications reports and voice mail 3 Status LED During normal operation the Status LED indicates the status of firmware update fan failure temperature console mode and excepti...

Страница 16: ...permanent marker 5 Analog FXS Two RJ11 connectors provide two analog FXS ports for connecting fax machines analog phones or modems to the MX250 During a power failure on the MX250 these circuits connect directly to the first two circuits on the FXO card of the first slot See section 3 4 2 on page 14 6 3 5 mm audio jacks The port marked IN provides a 3 5 mm unbalanced input for music on hold The so...

Страница 17: ...second disc 15 Serial Number This number identifies the main chassis Refer to this number to identify the system to a technical support representative or when returning the system for repair or replacement 16 Interface slots Each slot can accommodate one interface card for connection to the PSTN or an ISP There are four available types of interface cards FXS 8 analog subscriber side circuits using...

Страница 18: ...cables comply with EIA TIA 568A in all aspects except signals on pins 1 and 3 at one end appear on pins 2 and 6 at the other end Figure 3 8 shows the pin assignment on an RJ45 connector 3 4 2 Analog Circuits 3 4 2 1 Usage The MX250 supports up to three analog FXO or FXS cards through the interface slots Each analog card provides eight analog circuits FXO circuits support Loop Start and Ground Star...

Страница 19: ...igured for either T1 1 544 Mb s or E1 2 048 Mb s Each circuit uses one of several supported PSTN or IP WAN protocols The circuit type and protocol for each circuit are configured through the MX Administrator software Pin Signal Name Abbreviation 1 not connected 2 not connected 3 Ring 1 R1 4 Tip 1 T1 5 not connected 6 not connected Figure 3 5 Pin Description of the Analog RJ12 Connector Figure 3 6 ...

Страница 20: ...o connect the MX250 to an existing terminal system such as an existing PBX Figure 3 10 also displays MX250 pinouts and pinouts typically used for terminal and network equipment Consult the documentation for specific devices to confirm the pin assignment Figure 3 8 Pin Assignment of PCM Circuits on PCM Card Pin Signal Name Circuit Source 3 NC AA common 6 NC AA common 7 NC AA common 8 NC AA common 1...

Страница 21: ...istrator software 3 4 4 2 BRA RJ45 Pin Assignments Each ISDN BRA circuit terminates on an RJ45 connector Figure 3 11 shows the pin assignment for the RJ45 connectors on the BRA card Each circuit on the BRA card has the same pin assignment Each connector has the same pin assignment Figure 3 12 shows the function assignment of each pin Figure 3 11 Pin Assignment of the ISDN BRA S T Circuits on BRA I...

Страница 22: ... is turned off 3 Press and hold the Console button 4 Turn power on the MX250 5 Keep the Console button held for about 60 seconds The MX250 indicates it has entered console mode with the Status LED as shown in figure 7 5 To communicate with the MX250 in console mode connect your PC directly to the Second Ethernet Port item 8 in figure 3 2 on page 12 To access the MX250 configure your PC s network i...

Страница 23: ...onsole button for about two seconds The MX250 indicates it has entered Console mode with the Status LED as shown figure 7 5 Once the MX250 is in console mode you can access it at the assigned IP address To exit the console mode press and hold the console button for two seconds The MX250 exits the console mode and restores the status of the LEDs ...

Страница 24: ...20 MX250 Hardware Manual ...

Страница 25: ...y Installation by unqualified individuals may result in bodily injury and damage to the MX250 and surrounding equipment Warning This equipment is to be installed and maintained by service personnel only as defined by AS NZS 3260 Clause 1 2 14 3 Service Personnel Warning The MX250 must be installed in a secure location that has access restricted to qualified personnel only Placing the MX250 in a lo...

Страница 26: ...s move the air from left to right as you look at the front of the equipment Important Do not cover the slots and openings on the equipment These are provided for ventilation and protection against overheating 4 2 4 Cable Lengths Cable placement to associated equipment is an important site criteria Figure 4 1 shows the minimum and maximum length of any cables that you connect to the MX250 The dista...

Страница 27: ...ernal supply in addition to connecting to the ac power source Connect to the BPS12 as described in the BPS12 Hardware Manual The BPS12 battery unit sold by Zultys requires 3 RU of rack space and a separate ac source Warning You must use the BPS12 battery system provided by Zultys or use a battery source that is supplied by a Listed or Certified power supply providing SELV power This is required be...

Страница 28: ...lectronic device Assemble or disassemble equipment only in a static free work area Use a conductive work surfaces such as an antistatic mat to dissipate static charge Wear a conductive wrist strap and lab coat to dissipate static charge accumulation Minimize handling of assemblies and components Keep replacement parts in their original static free packaging Remove all plastic foam vinyl paper and ...

Страница 29: ...or personnel installing the system Warning The MX250 system must be properly grounded earthed When the equipment is mounted in an equipment rack the rack must be connected to ground earth See section 4 2 1 on page 22 for details on the proper grounding technique Warning Ensure that the rack is properly mounted to the floor or has properly fitted stabilizers so that it cannot move and will not tip ...

Страница 30: ... and B on the chassis 4 Install the other plastic bracket by repeating steps 1 to 3 for the left side of the rear panel Tool Purpose manual screwdriver Phillips or crosshead sized to fit M3 screwhead to fasten the modules into the MX250 manual screwdriver Phillips or crosshead sized to fit M4 screwhead to fasten the mounting brackets and cable management brackets to the sides of MX250 chassis manu...

Страница 31: ...sitions Mounting the chassis from the front side as shown in figure 5 3 Mounting the chassis from the rear side as shown in figure 5 4 Mounting the chassis from the middle of the front side as shown in figure 5 5 Mounting the chassis from the middle of the front side as shown in figure 5 6 Follow these instructions to install the mounting brackets on the MX250 chassis 1 Select the bracket position...

Страница 32: ...ket against the chassis so the holes on the mounting bracket are aligned with positions A and B front side or positions C and D middle of the front side or middle of the rear side installation For a rear side installation hold the plastic bracket against the chassis and the mounting bracket next to the plastic bracket as shown in figure 5 7 Figure 5 5 Mounting Brackets in the Middle of Front Side ...

Страница 33: ...other side of the chassis 5 6 Installing the Chassis into the Equipment Rack 1 Ensure that the two mounting brackets have been fastened to the chassis as described in section 5 5 on page 27 2 Hold the main chassis in place on a 19 equipment rack with the flanges of the mounting brackets aligned against the holes in the front of the rack Warning You need two people to lift and install the MX250 Gra...

Страница 34: ...30 MX250 Hardware Manual ...

Страница 35: ...k rack you must install two AAA batteries into the fan tray to power the real time clock on the MX250 The position for these batteries is on the fan tray shown in figure 6 1 To install the batteries 1 Ensure power is not applied to the MX250 2 Locate the removable fan tray item 17 in figure 3 2 on the rear side of the MX250 3 Unscrew with a screwdriver the captive retaining screw on the face plate...

Страница 36: ... the Ethernet ports from your system This prevents the MX250 from conflicting with other network devices 2 Ensure power to the MX250 is turned off 3 Press and hold the Console button 4 Turn power on the MX250 by using the ac cord to connect the ac input port to the wall outlet 5 Keep the Console button held for about 60 seconds The MX250 indicates it has entered console mode with the Status LED as...

Страница 37: ...em depends on the enabled system options and your network configuration Figure 6 2 lists the cables which may be required For T1 and E1 circuits Tx must be wired to Rx This may require straight or crossover cables Warning To reduce the risk of fire use only 0 4 mm 26 AWG or larger wire for all telecommunications circuits Contact your sales representative for ordering numbers for cables on the MX25...

Страница 38: ...e PSTN Connect T1 or E1 circuits through the PCM card s RJ45 connectors Configure circuit type and protocol for each circuit using the MX Administrator software If you have analog PSTN lines use the telco connector on the FXO interface card Figure 6 3 shows the several options in which you can connect to the PSTN using this connector 4 Connect data lines to the IP WAN Connect the MX250 to T1 or E1...

Страница 39: ...Ensure the power socket is located or installed near the equipment and is easily accessible Warning Zur sicheren Trennung des Gerätes vom Netz ist der Netzstecker zu ziehen Vergewissern Sie sich daß die Steckdose leicht zugänglich ist Warning Le cordon d alimentation est utilisé comme interrupteur général La prise de courant doit être située ou installée à proximité du matériel et être facile d ac...

Страница 40: ...ardware Manual 2 Enter the following values in the Login panel Login Administrator Password zultys URL Enter the configured IP address For details on configuring the MX250 see the MX Administration User s Manual ...

Страница 41: ...e problem as indicated in figure 7 2 At least one of the LEDs is off at least one of the LEDs is red and at least one LED is flashing State Power Load Status Power Off Off Off Off Boot code running Orange Off Off Linux running on SC Flash Green Off Off Disk mirroring and maintenance Flash Green Flash Orange Off SC application running Green Orange Off All boards operational Off Green Orange Applica...

Страница 42: ... 1 Master System LEDs Under normal operating conditions the LEDs on the master system of a cluster operate identically to a standalone MX system If the cluster is licensed and configured for redundancy the Status LED flashes orange 250 ms and off 250 ms when the cluster redundancy state is Redundancy Failed Refer to the MX Administrators Manual for information on configuring Clusters State Power L...

Страница 43: ...ium because of at least one of these conditions access to system services 80 and 90 application and report storage 80 and 90 voice mail storage 80 and 90 orange Load is heavy because of at least one of these conditions access to system services 90 application and report storage 90 voice mail storage 90 red Figure 7 4 Load LED Pattern Interpretation Startup is Completed Status Colors Firmware updat...

Страница 44: ... MX250 all applications are gracefully shutdown and Linux is terminated properly The stages of this shut down are shown by the LEDs as described in figure 7 6 The MX250 will shut down automatically State Power Load Status Normal see figure 7 3 Green Green Shut down initiated Green Green Flash Orange Applications shut down Green Off Off Linux shut down Flash Green Off Off Power off Off Off Off Figu...

Страница 45: ...em is off you should replace the AAA batteries in the fan tray at least once per year See section 6 2 on page 31 for instructions on replacing these batteries Caution The fan tray batteries are the only parts inside the MX250 that you can repair or replace yourself Refer servicing to only qualified service personnel For proper servicing of these products return them to the distributor from whom yo...

Страница 46: ...42 MX250 Hardware Manual ...

Страница 47: ...ice CPE customer premises equipment CSU channel services unit dc direct current DCE data circuit terminating equipment DMM digital multimeter DS1 digital signal level 1 1 544 Mb s DSU digital services unit DTE data terminal equipment E1 digital signal level 1 specified by ITU T 2 048 Mb s ESD electrostatic discharge ESF extended superframe format for t1 comprising 24 frames in a superframe ETSI Eu...

Страница 48: ...in inch IP Internet protocol IPv4 Internet protocol version 4 IPv6 Internet protocol version 6 ISDN integrated services digital network ISO International Organization for Standardization ISP Internet service provider ITTS ITU Telecommunications Standardization Sector formerly the CCITT ITU International Telecommunication Union K 1024 k kilo 1000 KB kilo byte 1024 bytes kb s kilo bits per second kH...

Страница 49: ...ork termination NTE network terminal equipment NVRAM non volatile random access memory OSI open systems interconnection PABX private automatic branch exchange PBX private branch exchange PC personal computer PCB printed circuit board PCM pulse code modulation PDF portable document format POTS plain old telephone service PPP point to point protocol PRA primary rate access PRI primary rate interface...

Страница 50: ...andom access memory T1 T carrier for digital signal level 1 1 544 Mb s TDM time division multiplexing TIA Telecommunications Industries Association Tx transmit TxD transmit data or transmitted data U see RU UI user interface UL Underwriter s Laboratory UPS uninterruptible power supply URL universal reference locator V Volt Vac Volts with alternating current Vdc Volts with direct current VF voice f...

Страница 51: ...e basis of datalink layer information these segments would require a common network layer address Ethernet The most widely installed local area network LAN technology Originally developed at the Xerox Corporation Palo Alto Research Center Ethernet is specified in the IEEE 802 3 standard Ethernet is a best effort delivery system that uses CSMA CD technology Ethernet can be run over a variety of phy...

Страница 52: ...al and organization membership Standards are expressed in the form of Requests for Comments RFCs Internet Protocol IP A network layer protocol that sends datagram packets between Internet nodes IP is a connectionless protocol implying that there is no continuing connection between communicating endpoints IP provides addressing type of service ToS specification security fragmentation and reassembly...

Страница 53: ...network nodes to deliver differentiated treatment of packets regardless of end to end construction or intra domain services Per Hop behavior is discussed in RFC 2474 and Per Hop Identification codes are defined in RFC 3140 Point to Point Protocol PPP A protocol that defines a communication method between two computers using a serial interface Typically used to connect a personal computer to a serv...

Страница 54: ...twork usage statistics and handle security issues Security Parameters Index SPI A hexadecimal value which uniquely identifies each tunnel Server A computer program or device that provides services to other computers Server Farm A network where clients install their own computers to run Web servers email or any other TCP IP based services they require making use of leased permanent Internet connect...

Страница 55: ... also has the console port directly connected to it so that you can always communicate with the system The board also controls the LEDs at the rear of the system that indicate the nature of a problem if the MX250 is unable to start up Three Way Handshake A triple exchange of data packets that establishes a TCP connection The Three Way Handshake transpires as follows 1 The initiator sends a SYN syn...

Страница 56: ...SIP request The response accepts rejects or redirects the request This role lasts only for the duration of that transaction if a piece of software responds to a request it acts as a UAS for the duration of that transaction If it generates a request later it assumes the role of a user agent client to process that transaction User Datagram Protocol UDP A communications protocol that offers a limited...

Страница 57: ...lia Canada China Europe Hong Kong Japan Korea Mexico New Zealand South Africa USA C 2 Safety CSA C22 2 60950 Safety of Information Technology Equipment AS NZ 60950 2000 Safety of Information Technology Equipment UL60950 Safety of Information Technology Equipment IEC60950 Safety of Information Technology Equipment C 3 Electromagnetic Compatibility EMC Emissions FCC part 15 Class A ICES 003 Radiated...

Страница 58: ...031 ISDN BRA AS ACIFS038 ISDN PRI PTC 220 CTR 12 13 E1 CTR 3 4 ISDN BRI CTR 21 Analog C 6 FCC Information C 6 1 Class A Statement This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial en...

Страница 59: ...ny may make changes in its facilities equipment operations or procedures that could affect the operation of the equipment If this happens the telephone company will provide advance notice in order for you to make the necessary modifications in order to maintain uninterrupted service If trouble is experienced with this equipment please contact Zultys for repair and warranty information If the troub...

Страница 60: ...56 MX250 Hardware Manual ...

Страница 61: ...d start 3 I important definition 4 installation precaution 1 installing chassis 29 interface slots 13 interfaces 2 IP address 12 IP addresses 31 IP phone connecting 34 ISDN 3 L LEDs 13 battery indication 38 description MX 37 40 M manual acronyms 43 46 feedback 5 special paragraph styles 4 Molex Mini Fit 22 P PCM function 2 pin assignments 16 PCM card connection 34 pin assignment BRA 17 Ethernet 14...

Страница 62: ...58 MX250 Hardware Manual Index U UPS 23 V ventilation 22 W WAN connection 34 warning definition in manual 4 ...

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