Juniper Networks MX240 - Manual

Table of Contents About This Guide xvii Objectives ....................................................................................................xviiAudience .....................................................................................................xviiDocumentation Conventions ........

SCB LEDs ................................................................................................20Fan LEDs ................................................................................................20Alarm Relay Contacts ....................................................................

Chapter 8 Connecting the Router 49 Tools and Parts Required ..............................................................................49Connecting the Router to Management and Alarm Devices ...........................49 Connecting to a Network for Out-of-Band Management ............................

Chapter 12 Troubleshooting Hardware Components 79 Overview of Troubleshooting Resources ........................................................79 Juniper Networks Technical Assistance Center ........................................79Command-Line Interface ..............................................

Replacing DPCs and Transceivers ................................................................106 Replacing a DPC ...................................................................................106 Removing a DPC ............................................................................106Ins...

AC Power Circuit Breaker Specifications ...............................................174AC Power Cord Specifications ...............................................................174 Site Electrical Wiring Guidelines ..................................................................176 Distance L...

Return Procedure ........................................................................................203Tools and Parts Required ............................................................................204Packing the Router for Shipment ...........................................................

List of Figures Figure 1: Front View of a Fully Configured Router Chassis ..............................6Figure 2: Rear View of a Fully Configured AC-Powered Router Chassis (110 V) ..............................................................................................................6 Figure ...

Figure 40: Installing the Fan Tray in an MX240 Router .................................94Figure 41: Removing the Air Filter from an MX240 Router ...........................95Figure 42: Installing the Air Filter in an MX240 Router ..................................96Figure 43: Removing an SCB ..........

List of Tables Table 1: Notice Icons ..................................................................................xviiiTable 2: Text and Syntax Conventions ........................................................xviiiTable 3: Technical Documentation for Supported Routing Platforms ................

Table 40: RJ-45 Connector Pinout for the Routing Engine ETHERNET Port .......................................................................................................185 Table 41: RJ-45 Connector Pinout for the AUX and CONSOLE Ports ............186 xvi ■ List of Tables MX240 Ethernet Services...

About This Guide This preface provides the following guidelines for using the MX240 Ethernet Services Router Hardware Guide : ■ Objectives on page xvii ■ Audience on page xvii ■ Documentation Conventions on page xviii ■ List of Technical Publications on page xix ■ Obtaining Documentation on page xxv...

Documentation Conventions Table 1 on page xviii defines the notice icons used in this guide. Table 1: Notice Icons Description Meaning Icon Indicates important features or instructions. Informational note Indicates a situation that might result in loss of data or hardware damage. Caution Alerts you ...

Table 2: Text and Syntax Conventions (continued) Examples Description Convention ■ To configure a stub area, includethe stub statement at the [edit protocols ospf area area-id] hierarchy level. ■ The console port is labeled CONSOLE . Represents names of configurationstatements, commands, files, andd...

Table 6 on page xxv lists additional books on Juniper Networks solutions that you canorder through your bookstore. A complete list of such books is available at http://www.juniper.net/books . Table 3: Technical Documentation for Supported Routing Platforms Description Book JUNOS Software for Support...

Table 3: Technical Documentation for Supported Routing Platforms (continued) Description Book Provides an overview of policy concepts and describes how toconfigure routing policy, firewall filters, and forwarding options. Policy Framework Provides an overview of routing concepts and describes how to...

Table 3: Technical Documentation for Supported Routing Platforms (continued) Description Book J-Web User Guide Describes how to use the J-Web graphical user interface (GUI) toconfigure, monitor, and manage Juniper Networks routingplatforms. J-Web Interface User Guide JUNOS API and Scripting Document...

Table 3: Technical Documentation for Supported Routing Platforms (continued) Description Book Provides an overview, basic instructions, and specifications forJ-series routing platforms. The guide explains how to prepare yoursite for installation, unpack and install the router and itscomponents, inst...

Table 4: JUNOS Software Network Operations Guides Description Book Describes the most basic tasks for running a network using JuniperNetworks products. Tasks include upgrading and reinstalling JUNOSsoftware, gathering basic system management information,verifying your network topology, and searching...

Table 5: JUNOS Software with Enhanced Services Documentation (continued) Description Book Provides instructions for migrating an SSG device runningScreenOS software or a J-series router running the JUNOSsoftware to JUNOS software with enhanced services. JUNOS Software with Enhanced ServicesMigration...

Table 6: Additional Books Available Through http://www.juniper.net/books (continued) Description Book Provides an overview of Multiprotocol Label Switching (MPLS) applications (such as Layer 3virtual private networks [VPNs], Layer 2 VPNs, virtual private LAN service [VPLS], andpseudowires), explains...

Requesting Technical Support Technical product support is available through the Juniper Networks TechnicalAssistance Center (JTAC). If you are a customer with an active J-Care or JNASC supportcontract, or are covered under warranty, and need postsales technical support, youcan access our tools and r...

xxviii ■ Requesting Technical Support MX240 Ethernet Services Router Hardware Guide

Part 1 MX240 Router Overview ■ Router Overview on page 3 ■ Hardware Components on page 5 MX240 Router Overview ■ 1

Chapter 1 Router Overview This chapter provides an overview of the MX240 Ethernet Services Router, discussingthe following topics: ■ Router Description on page 3 ■ Component Redundancy on page 4 Router Description The MX240 Ethernet Services Router is an Ethernet-optimized edge router thatprovides b...

Component Redundancy The MX240 chassis provides redundancy and resiliency. The hardware system isfully redundant, including power supplies, Routing Engines, and SCBs. A fully configured router is designed so that no single point of failure can cause theentire system to fail. Only a fully configured ...

Chapter 2 Hardware Components This chapter provides an overview of the router's hardware components: ■ Router Chassis on page 5 ■ Midplane on page 8 ■ Dense Port Concentrators (DPCs) on page 8 ■ Host Subsystem on page 11 ■ Cable Management System on page 17 ■ Craft Interface on page 17 ■ Power Suppl...

Figure 1: Front View of a Fully Configured Router Chassis Figure 2: Rear View of a Fully Configured AC-Powered Router Chassis (110 V) 6 ■ Router Chassis MX240 Ethernet Services Router Hardware Guide

Figure 3: Rear View of a Fully Configured AC-Powered Router Chassis (220V) Figure 4: Rear View of a Fully Configured DC-Powered Router Chassis Router Chassis ■ 7 Chapter 2: Hardware Components

Midplane The midplane is located toward the rear of the chassis and forms the rear of the DPCcard cage (see Figure 5 on page 8). The DPCs and SCBs install into the midplanefrom the front of the chassis, and the power supplies install into the midplane fromthe rear of the chassis. The cooling system ...

Engine downloads the DPC software, the DPC runs its diagnostics, and the PacketForwarding Engines housed on the DPC are enabled. Forwarding on other DPCscontinues uninterrupted during this process. For DPC replacement instructions, see“Replacing a DPC” on page 106. If a slot is not occupied by a DPC...

DPC Components Each DPC consists of the following components: ■ DPC cover, which functions as a ground plane and a stiffener. ■ Fabric interfaces. ■ Two Gigabit Ethernet interfaces that allow control information, route information,and statistics to be sent between the Routing Engine and the CPU on t...

Table 8: 40-Port Gigabit Ethernet DPC LEDs (continued) Description State Color Label Link is active. No link. On steadily Green Off LINK Two LEDs, located on the craft interface above the DPC, display the status of theDPC and are labeled OK and FAIL . For more information about the DPC LEDs located ...

Figure 8: SCB SCB Slots You can install one or two SCBs. The SCBs install horizontally into the front of thechassis in the slots labeled 0 and 1/0 (the multifunction slot 1/0 can contain either SCB1 or DPC0). If any slots are empty, you must install a blank panel. SCB Redundancy If two SCBs are inst...

SCB Components Each SCB consists of the following components: ■ Chassis management Ethernet switch. ■ I2C bus logic, used for low-level communication with each component. ■ Component redundancy circuitry. ■ Control Board/Routing Engine mastership mechanism. ■ Gigabit Ethernet switch that is connecte...

Routing Engine The Routing Engine is an Intel-based PC platform that runs JUNOS software. Softwareprocesses that run on the Routing Engine maintain the routing tables, manage therouting protocols used on the router, control the router interfaces, control somechassis components, and provide the inter...

■ CPU—Runs JUNOS software to maintain the router's routing tables and routingprotocols. It has a Pentium-class processor. ■ DRAM—Provides storage for the routing and forwarding tables and for otherRouting Engine processes. ■ USB port—Provides a removable media interface through which you can install...

Table 10: Routing Engine LEDs Description State Color Label Routing Engine is the Master. On steadily Blue MASTER Hard disk is functioning normally. Greenblinking Green HDD Routing Engine is transitioning online. Routing Engine is functioning normally. Blinking On steadily Green ONLINE Routing Engin...

Cable Management System The cable management system (see Figure 11 on page 17 and Figure 12 on page 17)consists of plastic dividers located on the left and right sides of each DPC, SCB, andmultifunction slot. The cable management system allows you to route the cablesoutside the router and away from ...

■ SCB LEDs on page 20 ■ Fan LEDs on page 20 ■ Alarm Relay Contacts on page 21 Figure 13: Front Panel of the Craft Interface NOTE: At least one SCB must be installed in the router for the craft interface to obtain power. Alarm LEDs and Alarm Cutoff/Lamp Test Button Two large alarm LEDs are located at...

Table 11: Alarm LEDs and Alarm Cutoff/Lamp Test Button Description State Color Shape Critical alarm LED—Indicates a critical conditionthat can cause the router to stop functioning.Possible causes include component removal, failure,or overheating. On steadily Red Warning alarm LED—Indicates a serious...

DPC LEDs Each DPC has LEDs on the craft interface that indicate its status. The DPC LEDs,labeled 1/0 , 1 , and 2 , ( 1/0 shows status of either SCB1 or DPC0, depending on which component is installed in the slot), are located along the bottom of the craft interface. Table 14: DPC LEDs Description St...

Alarm Relay Contacts The craft interface has two alarm relay contacts for connecting the router to externalalarm devices (see Figure 14 on page 21). Whenever a system condition triggerseither the red or yellow alarm on the craft interface, the alarm relay contacts arealso activated. The alarm relay ...

Figure 15: AC Power Supply WARNING: The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 groundlugs) provided on the chassis in addition to the grounding pin of the power supplycord. This separate pro...

Table 17: AC Power Supply LEDs Description State Color Label AC power input voltage is below 78 VAC. Off Amber AC OK AC power input voltage is within 78–264 VAC. On Green DC power outputs generated by the power supply are not within the normaloperating ranges. Off Green DC OK DC power outputs genera...

and PEM2 (left to right). You can upgrade your DC power system from one to two power supplies. A single DC power supply provides power to all components. One DC power supply is required. A second DC power supply provides redundancy.If a DC power supply in a redundant configuration fails, the redunda...

The air intake to cool the chassis is located on the side of the chassis next to the airfilter. Air is pulled through the chassis toward the fan tray, where it is exhausted outthe side of the system. The air intake to cool the power supplies is located in thefront of the router above the craft inter...

Figure 19: Air Filter 26 ■ Cooling System MX240 Ethernet Services Router Hardware Guide

Chapter 3 Preparing the Site for Router Installation This chapter describes how to prepare your site for installation of the MX240 router.It discusses the following topics: ■ Site Preparation Checklist on page 29 ■ Cabinet Requirements on page 30 ■ Rack Requirements on page 31 ■ Clearance Requiremen...

Table 19: Site Preparation Checklist (continued) Date Performed By For More Information Item or Task “Calculating Power Budget forFiber-Optic Cable” on page 181 Calculate the optical power budget and opticalpower margin. Cabinet Requirements The router can be installed in a standard 482-mm wide (or ...

Rack Requirements The router can be installed in a rack. Many types of racks are acceptable, includingfour-post (telco) racks and open-frame racks. An example of an open-frame rackappears in Figure 20 on page 32. The following sections describe rack requirements: ■ Rack Size and Strength on page 31 ...

routers. Allow 2.8 in. (7 cm) between the side of the chassis and anynon-heat-producing surface such as a wall. ■ For service personnel to remove and install hardware components, there mustbe adequate space at the front and back of the router. At least 24 in. (61 cm) isrequired both in front of and ...

Chapter 4 Installation Overview After you have prepared your installation site as described in “Preparing the Site forRouter Installation” on page 29, you are ready to unpack and install the router. It isimportant to proceed through the installation process in the following order: 1. Review the safe...

Chapter 5 Unpacking the Router This chapter describes how to prepare to install the router. It discusses the followingtopics: ■ Tools and Parts Required on page 37 ■ Unpacking the Router on page 37 ■ Verifying Parts Received on page 38 Tools and Parts Required To unpack the router and prepare for in...

To unpack the router (see Figure 22 on page 38): 1. Move the shipping crate to a staging area as close to the installation site aspossible, where you have enough room to remove the components from thechassis. While the chassis is bolted to the pallet, you can use a forklift or palletjack to move it....

If any part is missing, contact a customer service representative. A fully configured router contains the router chassis with installed components, listedin Table 20 on page 39, and an accessory box, which contains the parts listed inTable 21 on page 39. The parts shipped with your router can vary d...

Chapter 6 Installing the Mounting Hardware The router can be installed in a four-post rack or cabinet or an open-frame rack.Install the mounting hardware on the rack before installing the router. After the mounting hardware is installed, proceed to “Installing the Router” on page 45 or “Installing t...

To install the mounting shelf on the front rails of a four-post rack or cabinet, or therails of an open-frame rack: 1. If needed, install cage nuts in the holes specified in Table 22 on page 41. 2. On the back of each rack rail, partially insert a mounting screw into the lowesthole specified in Tabl...

Figure 24: Installing the Mounting Hardware for an Open-Frame Rack Moving the Mounting Brackets for Center-Mounting the Router Two removable mounting brackets are attached to the mounting holes closest to thefront of the chassis. You can move the pair of brackets to another position on theside of th...

Chapter 7 Installing the Router This chapter discusses the following router installation topics: ■ Safety Requirements, Warnings, and Guidelines on page 45 ■ Installing the Router Using a Mechanical Lift on page 45 Safety Requirements, Warnings, and Guidelines To avoid harm to yourself or the router...

Tools Required To install the router, you need the following tools: ■ Mechanical lift ■ Phillips (+) screwdriver, number 2 Installing the Router Using a Lift Before installing the router in the rack, read the safety information in “Chassis-LiftingGuidelines” on page 132. Remove the router from the s...

Figure 25: Installing the Router in the Rack NOTE: This illustration depicts the router being installed in an open-frame rack. For an illustration of the mounting hardware required for a four-post rack or cabinet, seeFigure 23 on page 42. Installing the Router Using a Mechanical Lift ■ 47 Chapter 7:...

Chapter 8 Connecting the Router ■ Tools and Parts Required on page 49 ■ Connecting the Router to Management and Alarm Devices on page 49 ■ Connecting DPC Cables on page 51 Tools and Parts Required To connect the router to management devices and DPCs, you need the followingtools and parts: ■ Phillips...

system condition that triggers the red or yellow alarm LED on the craft interface alsoactivates the corresponding alarm relay contact. The terminal blocks that plug into the alarm relay contacts are supplied with therouter. They accept wire of any gauge between 28-AWG and 14-AWG (0.08 and2.08 mm2), ...

CAUTION: Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidentalexposure to laser light. 3. Insert the cable connector into the cable connector port on the DPC faceplate. NOTE: The XFP cages and optics on t...

Chapter 9 Grounding and Providing Power to theRouter ■ Tools and Parts Required on page 53 ■ Grounding the Router on page 54 ■ Connecting Power to an AC-Powered Router on page 54 ■ Powering On an AC-Powered Router on page 55 ■ Connecting Power to a DC-Powered Router on page 56 ■ Powering On a DC-Pow...

Grounding the Router You ground the router by connecting a grounding cable to earth ground and thenattaching it to the chassis grounding points using UNC 1/4-20 two screws. You mustprovide the grounding cables (the cable lugs are supplied with the router). Forgrounding cable specifications, see “Cha...

NOTE: Each power supply must be connected to a dedicated AC power feed and a dedicated external circuit breaker. We recommend that you use a 15 A (250 VAC)minimum, or as permitted by local code. 4. Dress the power cord appropriately. Verify that the power cord does not blockthe air exhaust and acces...

If any of the status LEDs indicates that the power supply is not functioningnormally, repeat the installation and cabling procedures described in “ReplacingPower System Components” on page 112. NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. After powerin...

Figure 31: Connecting DC Power to the Router Powering On a DC-Powered Router WARNING: Before performing the following procedure, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on thepanel board that services the DC circuit, switch the ci...

Chapter 10 Configuring JUNOS Software ■ Configuring the JUNOS Software on page 61 Configuring the JUNOS Software The router is shipped with the JUNOS software preinstalled and ready to be configuredwhen the router is powered on. There are three copies of the software: one on aCompactFlash card in th...

[edit]root@# set system root-authentication ssh-rsa public-key 11. Optionally, display the configuration to verify that it is correct. [edit]root@# show system { host-name host-name ; domain-name domain-name ; backup-router address ; root-authentication { authentication-method ( password | public-ke...

Chapter 11 Maintaining Hardware Components This chapter describes how to maintain hardware components installed in the router.Some components, such as the craft interface, require no maintenance. For information about returning a part to Juniper Networks for repair or replacement,see “Contacting Cus...

few minutes without the air filter in place. For maintenance instructions, see“Maintaining the Air Filter” on page 68. Maintaining Cooling System Components This section discusses the following topics: ■ Maintaining the Air Filter on page 68 ■ Maintaining the Fan Tray on page 68 Maintaining the Air ...

Maintaining the Host Subsystem The host subsystem comprises an SCB and a Routing Engine installed into a slot inthe SCB. To maintain the host subsystem components, follow these guidelines: ■ Check the LEDs on the craft interface to view information about the status ofthe Routing Engines. For more in...

■ To check the status of the SCBs, issue the show chassis environment cb command. The output is similar to the following: user@host> show chassis environment cb CB 0 status: State Online Master Temperature 40 degrees C / 104 degrees F Power 1 1.2 V 1208 mV 1.5 V 1521 mV 1.8 V 1807 mV 2.5 V 2507 m...

user@host> show chassis environment cb 0 CB 0 status: State Online Temperature Intake 66 degrees C / 150 degrees F Temperature Exhaust A 67 degrees C / 152 degrees F Temperature Exhaust B 73 degrees C / 163 degrees F Power 1.2 V 1153 mV 1.5 V 1417 mV 1.8 V 1704 mV 2.5 V 2375 mV 3.3 V 3138 mV 5.0 ...

3 Empty 4 Empty 5 Online 42 6 0 1024 16 57 For more detailed output, add the detail option. The following example does not specify a slot number, which is optional: user@host> show chassis fpc detail Slot 1 information: State Online Temperature 33 degrees C / 91 degrees F Total CPU DRAM 1024 MB T...

Maintaining DPC Cables To maintain DPCs and DPC cables, follow these guidelines: ■ Use the cable management system (shown in Figure 11 on page 17) to supportcables and prevent cables from dislodging or developing stress points. ■ Place excess cable out of the way in the cable management system. Do n...

CAUTION: Failure to handle DPCs as specified in this document can cause irreparable damage. This section discusses how to hold DPCs in both the vertical and horizontal positions.Regardless of orientation, this section uses the same terms for all four edges of theDPC (see Figure 32 on page 75): ■ Fac...

NOTE: A DPC weighs 13.1 lb (5.9 kg). Be prepared to accept the full weight of the DPC as you lift it. To hold a DPC vertically: 1. Orient the DPC so that the faceplate faces you. To verify orientation, confirmthat the text on the DPC is right-side up and the electromagnetic interference(EMI) strip i...

Never carry the DPC by the faceplate with only one hand. Do not rest any edge of a DPC directly against a hard surface (seeFigure 34 on page 77). Do not stack DPCs. Figure 34: Do Not Rest the DPC on an Edge If you must rest the DPC temporarily on an edge while changing its orientationbetween vertica...

If you must insert the DPC into a bag by yourself, first lay the DPC horizontally ona flat, stable surface, sheet metal side down. Orient the DPC with the faceplate facingyou. Carefully insert the DPC connector edge into the opening of the bag, and pullthe bag toward you to cover the DPC. Never stac...

Chapter 12 Troubleshooting Hardware Components This chapter describes how to troubleshoot problems with hardware componentsinstalled in the router. If you encounter software problems, or problems with hardwarecomponents not discussed here, contact the Juniper Networks Technical AssistanceCenter (JTA...

You enter CLI commands on one or more external management devices connectedto ports on the Routing Engine. For more information about the Routing Engineports, see “Routing Engine Interface Ports” on page 16. For information about using the CLI to display details about alarms generated byinterfaces a...

■ Alarm LEDs—One large red circular LED and one large yellow triangular LED,located on the upper right of the craft interface, indicate two levels of alarmconditions. The circular red LED lights to indicate a critical condition that canresult in a system shutdown. The triangular yellow LED lights to...

RE might still be booting or the SCB is not receiving power. For more information,see “SCB Components” on page 13. ■ RE LEDs—Four LEDs, labeled MASTER , HDD , ONLINE , and FAIL on each Routing Engine faceplate indicate the status of the Routing Engine and hard disk drive.For more information, see Ta...

■ See “Maintaining Cooling System Components” on page 68. If the fans are not functioning normally, follow these guidelines to troubleshoot thefans: ■ If the red alarm LED on the craft interface lights, use the CLI to get informationabout the source of an alarm condition: user@host> show chassis ...

Total RLDRAM 256 MB Total DDR DRAM 4096 MB Start time: 2007-12-06 11:33:01 PST Uptime: 4 hours, 34 minutes, 48 secondsSlot 2 information: State Online Temperature 33 degrees C / 91 degrees F Total CPU DRAM 1024 MB Total RLDRAM 256 MB Total DDR DRAM 4096 MB Start time: 2007-12-06 11:33:05 PST Uptime:...

Temperature OK DC output OK If a power supply is not functioning normally, perform the following steps to diagnoseand correct the problem: ■ If a red alarm condition occurs, issue the show chassis alarms command to determine the source of the problem. ■ If all power supplies have failed, the system ...

Chapter 13 Replacing Hardware Components This chapter explains how to replace hardware components on the router. It discussesthe following topics: ■ Field-Replaceable Units (FRUs) on page 87 ■ Tools and Parts Required on page 88 ■ Replacing the Craft Interface on page 89 ■ Replacing Cooling System C...

Table 23: Field-Replaceable Units Hot-Pluggable FRUs Hot-Removable and Hot-Insertable FRUs Master Switch Control Board (SCB) (ifredundant) Master Routing Engine (if redundant) Switch Control Board (SCB) (nonredundant) Routing Engine (nonredundant) Air filter Craft interface Backup Switch Control Boa...

Table 24: Tools and Parts Required (continued) Components Tool or part Air filter Routing Engine Craft interface SCB Cables and connectors Fan tray Phillips (+) screwdrivers, numbers 1and 2 DPC Rubber safety cap Cables and connectors DC power supply Wire cutters Replacing the Craft Interface The cra...

4. Grasp the craft interface faceplate and carefully tilt it toward you until it ishorizontal. 5. Disconnect the ribbon cable from the back of the faceplate by gently pressingon both sides of the latch with your thumb and forefinger. Remove the craftinterface from the chassis. Figure 36: Removing th...

Figure 37: Installing a Craft Interface Replacing Alarm Relay Wires The alarm relay wires connect external alarm-reporting devices to the RED and YELLOW relay contacts on the craft interface. The terminal blocks that plug into the alarm relay contacts are supplied with therouter. The terminal blocks...

Connecting the Alarm Relay Wires To connect the alarm relay wires between a router and an alarm-reporting device(see Figure 38 on page 91): 1. Prepare the required length of replacement wire with gauge between 28-AWGand 14-AWG (0.08 and 2.08 mm2). 2. Insert the replacement wires into the slots in th...

WARNING: To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning. 4. Press the latch located on the inside of the fan tray to release it from the chassis. 5. Place one hand under the fan tray to support it and pul...

Figure 40: Installing the Fan Tray in an MX240 Router Replacing the Air Filter The router has one air filter that installs vertically in the rear of the chassis. The airfilter is hot-insertable and hot-removable. The air filter is located in the rear of the chassis on the left side. The air filter w...

To remove the air filter (see Figure 41 on page 95): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap to one of the ESD points on the chassis. For more informationabout ESD, see “Preventing Electrostatic Discharge Damage” on page 130. 2. Loosen the c...

Figure 42: Installing the Air Filter in an MX240 Router Replacing Host Subsystem Components To replace a host subsystem, use the following procedures: ■ Taking the Host Subsystem Offline on page 96 ■ Replacing an SCB on page 97 Taking the Host Subsystem Offline The host subsystem is taken offline an...

1. Determine whether the host subsystem is functioning as the master or as thebackup, using one of the two following methods: ■ Check the Routing Engine LEDs on the craft interface. If the green RE MASTER LED is lit, the corresponding host subsystem is functioning as the master. ■ Issue the followin...

“Taking the Host Subsystem Offline” on page 96). To replace an SCB, use the followingprocedures: ■ Operating and Positioning the SCB Ejectors on page 98 ■ Removing an SCB on page 99 ■ Installing an SCB on page 100 Operating and Positioning the SCB Ejectors ■ When removing or inserting an SCB, ensure...

Removing an SCB To remove an SCB (see Figure 43 on page 99): NOTE: You can remove the SCB and Routing Engine as a unit, or remove the Routing Engine separately. 1. Place an electrostatic bag or antistatic mat on a flat, stable surface. 2. Attach an electrostatic discharge (ESD) grounding strap to yo...

Installing an SCB To install an SCB (see Figure 44 on page 102): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap to one of the ESD points on the chassis. For more informationabout ESD, see “Preventing Electrostatic Discharge Damage” on page 130. 2. ...

To check the status of the SCB, use the CLI command: user@host> show chassis environment cb CB 0 status: State Online Master Temperature 25 degrees C / 77 degrees F Power 1 1.2 V 1198 mV 1.5 V 1508 mV 1.8 V 1830 mV 2.5 V 5059 mV 3.3 V 6593 mV 5.0 V 5111 mV 12.0 V 12181 mV 1.25 V 1250 mV 3.3 V SM3...

Figure 44: Installing an SCB Replacing a Routing Engine The router can have one or two Routing Engines. They are located in the front of thechassi within the SCBs in the horizontally along the bottom of the chassis in the slotsmarked 0 and 1 . Each Routing Engine weighs approximately 2.4 lb (1.1 kg)...

NOTE: To maintain proper airflow through the chassis, do not leave an SCB installed in the chassis without a Routing Engine for extended periods of time. If a RoutingEngine is removed, a replacement Routing Engine should be installed as soon aspossible. Figure 45: Removing a Routing Engine Installin...

user@host> show chassis routing-engine Routing Engine status: Slot 0: Current state Master... For more information about using the CLI, see the JUNOS software manuals. Figure 46: Installing a Routing Engine Replacing Connections to Routing Engine Interface Ports You can connect the router to exte...

Replacing the Management Ethernet Cable To connect the Routing Engine to a network for out-of-band management, connectan Ethernet cable with RJ-45 connectors to the ETHERNET port on the Routing Engine. One such cable is provided with the router. For cable specifications, see “RoutingEngine Interface...

Connecting the Cable to a Management Console or Auxiliary Device To connect a serial cable to a management console or auxiliary device: 1. Plug the RJ-45 end of the replacement serial cable into the CONSOLE or AUX port. Figure 47 on page 104 shows the external device ports on the Routing Engine. 2. ...

user@host> request chassis fpc slot slot-number offline For more information about the command, see the JUNOS System Basics and Services Command Reference . 5. Disconnect the cables from the DPC. If the DPC uses fiber-optic cable,immediately cover each transceiver and the end of each cable with a...

CAUTION: After removing a DPC from the chassis, wait at least 30 seconds before reinserting it, removing a DPC from a different slot, or inserting a DPC into a differentslot. Figure 49: Removing a DPC Installing a DPC To install a DPC (see Figure 50 on page 110): 1. Attach an electrostatic discharge...

Figure 50: Installing a DPC Figure 51: Attaching a Cable to a DPC Removing an SFP or XFP Transceiver Small form-factor pluggable (SFPs) and XFPs are optical transceivers that are installedin a DPC. SFPs and XFPs are hot-insertable and hot-removable. Removing an SFP or XFP doesnot interrupt DPC funct...

WARNING: Do not look directly into a fiber-optic transceiver or into the end of a fiber-optic cable. Fiber-optic transceivers contain laser light sources that can damageyour eyes. 4. Remove the cable connector plugged into the transceiver. 5. Carefully drape the disconnected cable over the bobbins i...

Installing an SFP or XFP Transceiver To install an SFP or XFP: 1. Attach an ESD wrist strap to your bare wrist and connect the wrist strap to oneof the ESD points on the chassis. 2. Take each transceiver to be installed out of its electrostatic bag and identify theslot on the DPC where it will be in...

■ Replacing an AC Power Cord on page 118 ■ Replacing a DC Power Supply Cable on page 119 Removing an AC Power Supply The power supplies are located at the rear of the chassis. Each AC power supplyweighs approximately 5.0 lb (2.3 kg). CAUTION: Do not leave a power supply slot empty for more than 30 m...

Installing an AC Power Supply To install an AC power supply (see Figure 54 on page 114): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap to one of the ESD points on the chassis. For more informationabout ESD, see “Preventing Electrostatic Discharge ...

The power supplies are located at the rear of the chassis. Each DC power supplyweighs approximately 3.8 lb (1.7 kg). CAUTION: Do not leave a power supply slot empty for more than 30 minutes while the router is operational. For proper airflow, the power supply must remain in thechassis, or a blank pa...

Figure 55: Removing a DC Power Supply from an MX240 Router Installing a DC Power Supply WARNING: Before performing the following procedure, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on thepanel board that services the DC circuit, sw...

Figure 56: Installing a DC Power Supply in an MX240 Router Figure 57: Connecting DC Power to the Router Replacing an AC Power Cord To replace an AC power cord: ■ Disconnecting an AC Power Cord on page 119 ■ Connecting an AC Power Supply Cord on page 119 118 ■ Replacing Power System Components MX240 ...

Disconnecting an AC Power Cord WARNING: Before working on the router or near power supplies, unplug the power cord from an AC router. To disconnect the AC power cord: 1. Unplug the power cord from the power source receptacle. 2. Attach an electrostatic discharge (ESD) grounding strap to your bare wr...

Disconnecting a DC Power Supply Cable To disconnect a power cable for a DC power supply: 1. Switch the dedicated facility circuit breaker to the off position. Make sure thatthe voltage across the DC power source cable leads is 0 V and that there is nochance that the cables might become active during...

Figure 58: Connecting Power Cables to the DC Power Supply 4. Replace the clear plastic cover over the terminal studs on the faceplate. 5. Verify that the DC power cable is connected correctly, that it does not touch orblock access to router components, and that it does not drape where peoplecould tr...

2. Loosen the captive screws on either side of the chassis. 3. Remove the cable manager. Figure 59: Removing or Installing the Cable Management System Installing the Cable Management System To install the cable management system (see Figure 59 on page 122): 1. Position the cable management system on...

Appendix A Safety and Regulatory ComplianceInformation To install and use the router safely, follow proper safety procedures. This appendixdiscusses the following safety and regulatory compliance information: ■ Definition of Safety Warning Levels on page 125 ■ Safety Guidelines and Warnings on page ...

Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant detravailler sur un équipement, soyez conscient des dangers posés par les circuitsélectriques et familiarisez-vous avec les procédures couramment...

General Safety Guidelines and Warnings The following guidelines help ensure your safety and protect the router from damage.The list of guidelines might not address all potentially hazardous situations in yourworking environment, so be alert and exercise good judgment at all times. ■ Perform only the...

Waarschuwing Installatie en reparaties mogen uitsluitend door getraind en bevoegd personeel uitgevoerd worden. Varoitus Ainoastaan koulutettu ja pätevä henkilökunta saa asentaa tai vaihtaa tämän laitteen. Attention Tout installation ou remplacement de l'appareil doit être réalisé par du personnel qu...

sécurité. L'accès aux zones de sécurité est sous le contrôle de l'autorité responsablede l'emplacement. Warnung Diese Einheit ist zur Installation in Bereichen mit beschränktem Zutritt vorgesehen. Ein Bereich mit beschränktem Zutritt ist ein Bereich, zu dem nurWartungspersonal mit einem Spezialwerkz...

Preventing Electrostatic Discharge Damage Many router hardware components are sensitive to damage from static electricity.Some components can be impaired by voltages as low as 30 V. You can easilygenerate potentially damaging static voltages whenever you handle plastic or foampacking material or if ...

In addition, establish procedures to protect your equipment in the event of a fireemergency. Juniper Networks products should be installed in an environment suitablefor electronic equipment. We recommend that fire suppression equipment be availablein the event of a fire in the vicinity of the equipm...

Chassis-Lifting Guidelines The weight of a fully configured chassis is about 128 lb (58.1 kg). Observe thefollowing guidelines for lifting and moving the router: ■ Before moving the router, read the guidelines in “Preparing the Site for RouterInstallation” on page 29 to verify that the intended site...

Rack-Mounting Requirements and Warnings Ensure that the equipment rack into which the router is installed is evenly and securelysupported, to avoid the hazardous condition that could result from uneven mechanicalloading. WARNING: To prevent bodily injury when mounting or servicing the router in a ra...

■ Juniper Networks router må installeres i et stativ som er forankret tilbygningsstrukturen. ■ Denne enheten bør monteres nederst i kabinettet hvis dette er den eneste enheteni kabinettet. ■ Ved montering av denne enheten i et kabinett som er delvis fylt, skal kabinettetlastes fra bunnen og opp med ...

■ Juniper Networks router måste installeras i en ställning som är förankrad ibyggnadens struktur. ■ Om denna enhet är den enda enheten på ställningen skall den installeras längstned på ställningen. ■ Om denna enhet installeras på en delvis fylld ställning skall ställningen fyllasnedifrån och upp, me...

Varoitus Luokan 1 valodiodituote. Attention Alarme de produit LED Class I. Warnung Class 1 LED-Produktwarnung. Avvertenza Avvertenza prodotto LED di Classe 1. Advarsel LED-produkt i klasse 1. Aviso Produto de classe 1 com LED. ¡Atención! Aviso sobre producto LED de Clase 1. Varning! Lysdiodprodukt a...

Radiation from Open Port Apertures Warning WARNING: Because invisible radiation might be emitted from the aperture of the port when no fiber cable is connected, avoid exposure to radiation and do not stareinto open apertures. Waarschuwing Aangezien onzichtbare straling vanuit de opening van de poort...

■ Operating Temperature Warning on page 142 ■ Product Disposal Warning on page 143 Battery Handling Warning WARNING: Replacing the battery incorrectly might result in an explosion. Replace the battery only with the same or equivalent type recommended by the manufacturer.Dispose of used batteries acc...

Jewelry Removal Warning WARNING: Before working on equipment that is connected to power lines, remove jewelry, including rings, necklaces, and watches. Metal objects heat up whenconnected to power and ground and can cause serious burns or weld the metal objectto the terminals. Waarschuwing Alvorens ...

te voorkomen dat de luchtstroom wordt beperkt, dient er minstens 15,2 cm spelingrond de ventilatie-openingen te zijn. Varoitus Ettei Juniper Networks router-sarjan reititin ylikuumentuisi, sitä ei saa käyttää tilassa, jonka lämpötila ylittää korkeimman suositellun ympäristölämpötilan 40 ο C. Ettei i...

Waarschuwing Dit produkt dient volgens alle landelijke wetten en voorschriften te worden afgedankt. Varoitus Tämän tuotteen lopullisesta hävittämisestä tulee huolehtia kaikkia valtakunnallisia lakeja ja säännöksiä noudattaen. Attention La mise au rebut définitive de ce produit doit être effectuée co...

General Electrical Safety Guidelines and Warnings ■ Install the router in compliance with the following local, national, or internationalelectrical codes: ■ United States—National Fire Protection Association (NFPA 70), United StatesNational Electrical Code. ■ Canada—Canadian Electrical Code, Part 1,...

Varning! Innan du arbetar med ett chassi eller nära strömförsörjningsenheter skall du för växelströmsenheter dra ur nätsladden och för likströmsenheter bryta strömmenvid överspänningsskyddet. TN Power Warning WARNING: The router is designed to work with TN power systems. Waarschuwing Het apparaat is...

WARNING: The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 groundlugs) provided on the chassis in addition to the grounding pin of the power supplycord. This separate protective earthing terminal m...

accordance with the National Electrical Code in the US and the Canadian ElectricalCode in Canada. ■ Run two wires from the circuit breaker box to a source of 48 VDC. Use appropriategauge wire to handle up to 50 A. ■ Be sure to connect the ground wire or conduit to a solid office (earth) ground. Aclo...

¡Atención! Emplee sólo conductores de cobre. Varning! Använd endast ledare av koppar. DC Power Disconnection Warning WARNING: Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuitbreaker on the panel b...

que toda a corrente foi DESLIGADA, localize o disjuntor no painel que serve o circuitode corrente contínua e coloque-o na posição OFF (Desligado), segurando nessaposição a manivela do interruptor do disjuntor com fita isoladora. ¡Atención! Antes de proceder con los siguientes pasos, comprobar que la...

Aviso Ate con alambre la fuente de potencia cc Usando los terminales apropiados en el extremo del cableado. Al conectar potencia, la secuencia apropiada del cableadose muele para moler, +RTN a +RTN, entonces -48 V a -48 V. Al desconectar potencia,la secuencia apropiada del cableado es -48 V a -48 V,...

■ EN 60950-1 Safety of Information Technology Equipment ■ EMC ■ AS/NZS 3548 Class A (Australia/New Zealand) ■ EN55022 Class A (Europe) ■ FCC Part 15 Class A (USA) ■ VCCI Class A (Japan) ■ Immunity ■ EN-61000-3-2 Power Line Harmonics ■ EN-61000-3-3 Voltage Fluctuations and Flicker ■ EN-61000-4-2 ESD ...

Compliance Statements for EMC Requirements Canada This Class A digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada. European Community This is a Class A product. In a domestic environment this product might cause radioint...

Declaration of Conformity Japan 158 ■ Agency Approvals and Compliance MX240 Ethernet Services Router Hardware Guide

Translation: This is a Class A product. In a domestic environment this product might cause radiointerference in which case the user might be required to take adequate measures.VCCI-A United States The router has been tested and found to comply with the limits for a Class A digitaldevice, pursuant to...

Appendix B Physical Specifications ■ Physical Specifications on page 161 Physical Specifications Table 25 on page 161 summarizes the physical specifications for the router chassis. Table 25: Physical Specifications Value Description 8.71 in. (22.1 cm) high 17.45 in. (44.3 cm) wide 24.5 in. (62.2 cm)...

Appendix C Router Environmental Specifications ■ Router Environmental Specifications on page 163 Router Environmental Specifications Table 26 on page 163 specifies the environmental specifications required for normalrouter operation. In addition, the site should be as dust-free as possible. For more...

Appendix D Power Guidelines, Requirements, andSpecifications ■ Chassis Grounding Specifications on page 165 ■ DC Power Specifications and Requirements on page 166 ■ AC Power Specifications and Requirements on page 171 ■ Site Electrical Wiring Guidelines on page 176 Chassis Grounding Specifications T...

Figure 61: Grounding Cable Lug CAUTION: Before router installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectlyattached lug can damage the router. NOTE: The same cable lug is used for the DC power cables. Groudi...

DC Power System Electrical Specifications Table 28 on page 167 lists the DC power system electrical specifications. Table 28: DC Power System Electrical Specifications Specification Item Operating range: –40.5 to –72 VDC DC input voltage 31 A @ –48 VDC per input (maximum) DC system current rating 29...

power supply configurations. The base DC-powered router includes the midplane,craft interface, and fan tray running at normal speed. Table 30: DC-Powered Base Router Power Requirements CurrentRequirement(Amps @–48 VDC) PowerRequirement(Watts) DC Power Supply Configuration 1.04 A(approximate) 50 W(ap...

1.38 A + 0.4 A + 3.1 A + 1.9 A + 3(7.6 A) =1.38 A + 0.4 A + 3.1 A + 1.9 A + 22.8 A = 29.58 A @ –48 VDC = 1,420 W DC ■ Input current from a DC source other than –48 VDC (based on maximumconfiguration; applies to DC power supply only): (–54 VDC input) * (input current X) = (–48 VDC input) * (input cur...

DC Power Cable Specifications Figure 62 on page 170 shows a typical DC source cabling arrangement. Figure 62: Typical DC Source Cabling to the Router The DC power supply in PEM0 must be powered by dedicated power feeds derived from feed A , and the DC power supply in PEM2 must be powered by dedicate...

DC Power Cable Lug Specifications The accessory box shipped with the router includes the cable lugs that attach to theterminal studs of each power supply (see Figure 63 on page 171). Figure 63: DC Power Cable Lug CAUTION: Before router installation begins, a licensed electrician must attach a cable ...

AC Power Specifications ■ AC Power System Electrical Specifications on page 172 ■ AC Power Supply Electrical Specifications on page 172 AC Power System Electrical Specifications Table 33 on page 172 lists the AC power system electrical specifications. Table 33: AC Power System Electrical Specificati...

For AC-powered routers, you can use the information in Table 35 on page 173 andTable 36 on page 173 to calculate the power consumption and thermal output foryour hardware configuration. Table 35 on page 173 lists the power requirements for base AC-powered routersoperating under typical voltage condi...

Table 37 on page 175 provides specifications and Figure 64 on page 175 depicts theplug on the AC power cord provided for each country or region. Table 37: AC Power Cord Specifications Plug Type Electrical Specification Model Number Country SAA/3/15 240 VAC, 50 Hz AC CBL-M-PWR-RA-AU Australia CH2-16P...

Appendix E Cable and Wire Guidelines andSpecifications To prepare for router or component installation, ensure that you have all requiredcables and wires. ■ Network Cable Specifications and Guidelines on page 179 ■ Routing Engine Interface Cable and Wire Specifications on page 183 Network Cable Spec...

Single-mode fiber is so small in diameter that rays of light can reflect internallythrough one layer only. Interfaces with single-mode optics use lasers as light sources.Lasers generate a single wavelength of light, which travels in a straight line throughthe single-mode fiber. Compared with multimo...

Calculating Power Budget for Fiber-Optic Cable To ensure that fiber-optic connections have sufficient power for correct operation,calculate the link's power budget, which is the maximum amount of power it cantransmit. When you calculate the power budget, you use a worst-case analysis toprovide a mar...

Table 38: Estimated Values for Factors Causing Link Loss (continued) Estimated Link-Loss Value Link-Loss Factor 0.5 dB Splice Single-mode—0.5 dB/km Multimode—1 dB/km Fiber attenuation The following example uses the estimated values in Table 38 on page 181 to calculatelink loss ( LL ) for a 2 km-long...

Appendix F Cable Connector Pinouts This appendix describes the pinouts for the following cable connectors: ■ RJ-45 Connector Pinouts for the Routing Engine ETHERNET Port on page 185 ■ RJ-45 Connector Pinouts for the Routing Engine AUX and CONSOLEPorts on page 185 RJ-45 Connector Pinouts for the Rout...

an auxiliary or console management device. For more information, see “RoutingEngine Interface Ports” on page 16. Table 41 on page 186 describes the RJ-45connector pinout. Table 41: RJ-45 Connector Pinout for the AUX and CONSOLE Ports Description Signal Pin Request to Send RTS 1 Data Terminal Ready D...

Appendix G Installing the Router Without aMechanical Lift If you cannot use a mechanical lift to install the router (the preferred method), youcan install it manually. Before installing the router manually, you must first removecomponents from the chassis, and you must reinstall the components once ...

how to remove components from the chassis, first from the rear and then from thefront: ■ Removing the Power Supplies on page 188 ■ Removing the Fan Tray on page 189 ■ Removing SCBs on page 189 ■ Removing DPCs on page 190 Removing the Power Supplies The power supplies are located at the rear of the c...

Removing the Fan Tray In the rear of the chassis, the fan tray is located on the right of the chassis. The fantray weighs about 4.2 lb (1.9 kg). To remove the fan tray (see Figure 66 on page 189 ): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap to ...

4. Simultaneously rotate the ejector handles counterclockwise to unseat the SCB. 5. Grasp the ejector handles and slide the SCB about halfway out of the chassis. 6. Place one hand underneath the SCB to support it and slide it completely out ofthe chassis. Place it on the antistatic mat. CAUTION: Do ...

CAUTION: The weight of the DPC is concentrated in the back end. Be prepared to accept the full weight—up to 13.1 lb (5.9 kg)—as you slide the DPC out of the chassis. When the DPC is out of the chassis, do not hold it by the ejector handles, bus bars,or edge connectors. They cannot support its weight...

Installing the Chassis in the Rack Manually To install the router in the rack (see Figure 69 on page 193): CAUTION: If you are installing more than one router in a rack, install the lowest one first. Installing a router in an upper position in a rack or cabinet requires a lift. CAUTION: Before front...

Figure 69: Installing the Router in the Rack NOTE: This illustration depicts the router being installed in an open-frame rack. For an illustration of the mounting hardware required for a four-post rack or cabinet, seeFigure 23 on page 42. Reinstalling Components in the Chassis After the router is in...

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap to one of the ESD points on the chassis. For more informationabout ESD, see “Preventing Electrostatic Discharge Damage” on page 130. 2. For an AC-powered router, switch the AC switch on the power suppl...

Figure 71: Installing a Fan Tray Reinstalling SCBs To reinstall an SCB (see Figure 72 on page 196): CAUTION: Before removing or replacing an SCB, ensure that the ejector handles are stored vertically and pressed toward the center of the SCB. 1. Attach an electrostatic discharge (ESD) grounding strap...

Figure 72: Installing an SCB Reinstalling DPCs To reinstall a DPC (see Figure 73 on page 196): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap to one of the ESD points on the chassis. For more informationabout ESD, see “Preventing Electrostatic Disc...

Appendix H Contacting Customer Support andReturning Hardware This appendix describes how to return the router or individual components to JuniperNetworks for repair or replacement: ■ Locating Component Serial Numbers on page 197 ■ Contacting Customer Support on page 202 ■ Return Procedure on page 20...

PIC 2 BUILTIN BUILTIN 1x 10GE(LAN/WAN) Xcvr 0 REV 01 740-014279 KB602C3 XFP-10G-LR PIC 3 BUILTIN BUILTIN 1x 10GE(LAN/WAN)FPC 2 REV 01 750-018124 JY9642 DPCE 4x 10GE R CPU REV 06 710-013713 JY9337 DPC PMB PIC 0 BUILTIN BUILTIN 1x 10GE(LAN/WAN) Xcvr 0 REV 01 740-014279 KB602BQ XFP-10G-LR PIC 1 BUILTIN...

Figure 75: MX240 Chassis Serial Number Label SCB Serial Number Label The serial number is located on the right side of the top of the SCB (seeFigure 76 on page 199). Figure 76: SCB Serial Number Label Locating Component Serial Numbers ■ 199 Appendix H: Contacting Customer Support and Returning Hardw...

DPC Serial Number Label The serial number label is located on the center of the right side of the DPC (seeFigure 77 on page 200). Figure 77: DPC Serial Number Label Power Supply Serial Number Labels The serial number label is located on the top of the AC power supply (seeFigure 78 on page 201). The ...

Figure 78: AC Power Supply Serial Number Label Figure 79: DC Power Supply Serial Number Label Routing Engine Serial Number Label The serial number label is located on the right side of the top of the Routing Engine(see Figure 80 on page 202). Locating Component Serial Numbers ■ 201 Appendix H: Conta...

Figure 80: Routing Engine Serial Number Label Contacting Customer Support After you have located the serial numbers of the components you need to return,contact Juniper Networks Technical Assistance Center (JTAC) in one of the followingways. You can contact JTAC 24 hours a day, seven days a week: ■ ...

Return Procedure If the problem cannot be resolved by the JTAC technician, a Return MaterialsAuthorization (RMA) is issued. This number is used to track the returned material atthe factory and to return repaired or new components to the customer as needed. NOTE: Do not return any component to Junipe...

Index Symbols #, comments in configuration statements...................xix( ), in syntax descriptions............................................xix< >, in syntax descriptions.......................................xix[ ], in configuration statements...................................xix{ }, i...