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M5 and M10 Inter net Router s Hard w are Guide Juniper Networks , Inc. 1 194 North Mathilda A venue Sunny vale , Calif ornia 94089 US A 408-745-2000 www .
This product includes the Env oy SNMP Engine , deve loped by Epilo gue T echnology , an In tegrated Systems Company . Copyright © 1986-1997, Epilogue T echnology Corporation. All rights res erv ed. This program and its d ocumentation wer e de veloped at private expense , and no part of the m is in the public domain.
T able of Con tents About This Manual ..................... ............. ................. ............. ................. ............. . x v Objectives ..................... .............. ................ .............. ............. .............
P o w e r S u p p l i e s ................ .............. ............. ................. ............. ............... 1 6 A C P o w e r S u p p l y............ ................ .............. ................ .............. ......... 1 7 D C P o w e r S u p p l y .
P o w e r G u i d e l i n e s , R e q u i r e m e n t s , a n d S p e c i f i c a t i o n s ................ .............. ................ . 4 2 S i t e E l e c t r i c a l W i r i n g G u i d e l i n e s ... .............. ................ ........
Pa r t 3 Hard w are Maintenance, Replacement, and T roubleshooting Procedures Chapter 9 Maintain Hard ware Components .... ................ .............. .............. ................ ......... 7 5 R o u t i n e M a i n t e n a n c e P r o c e d u r e s .
I n s e r t t h e P C C a r d ................... ................ .............. ................ ........ 1 1 4 R e p l a c e t h e R o u t i n g E n g i n e ... ............. ................. ............. ................. ..... 1 1 5 R e m o v e t h e R o u t i n g E n g i n e .
P o w e r D i s c o n n e c t i o n W a r n i n g ...................... ................ .............. ........ 1 4 4 T N a n d I T P o w e r W a r n i n g ................ .............. ................ .............. ..... 1 4 5 I n s t a l l a t i o n S a f e t y G u i d e l i n e s a n d W a r n i n g s .
Index Index ........... .............. ................ .............. .............. ................ .............. ................1 7 9 Ta b l e o f C o n t e n t s ix.
x M5 and M1 0 Internet Routers Har dwar e Guide.
List of F igures List of F igur es F i g u r e 1 : F r o n t o f M 5 C h a s s i s.......... ............. .............. ................ .............. ................ .............. .. 6 Figur e 2: Fro n t o f M 1 0 C h a s s i s ........ ........
List of Figures F i g u r e 4 9 : F E B S e r i a l N u m b e r I D L a b e l .... ................. ............. ................. ............. ................. ..... 1 6 5 Figur e 50: PIC S e r i a l N u m b e r I D L a b e l ................... .
List of T ables List of T ables T a b l e 1 : J u n i p e r N e t w o r k s T e c h n i c a l D o c u m e n t a t i o n ... .............. ................ .............. ................ ............ T a b l e 2 : F i e l d - R e p l a c e a b l e U n i t s .
List of T ables xiv M5 and M1 0 Internet Routers Hardwar e Guide.
About This Manual This chapter provides a high-level o vervie w of the M5 and M1 0 Internet Routers Hardwar e Guide : • Objectives on page xv • A udience on page xv • Document Organiz ation on p.
Documentation Co nv entions networ k configura tion. Any det ailed discussion of these conc epts is bey ond the scope of this manual. Document Organization This manual is divided into se v eral parts:.
List of T echnical Publicatio ns Notes , Cautions , and W arnings Notes, cautio ns , and warnings are denoted b y the follo wing symbols: A note indicates information that might be helpful in a particu lar situation or that might oth erwise be ov erlook ed.
List of T echnical Publications Book Description MPLS Applications Provides an o vervie w of traffic engineering concepts and describes how to configur e tr affic engineering protocols . Multicast Pro vides an o vervie w of multicast concepts and describes how to configur e multicast routing prot ocols .
How t o Request Sup port Book Description JUNOScope Software Documentation JUNOScope Softwar e Guide Describes the JUNOScope softwar e graphical user interf ace (GUI), ho w to inst all and administer the so ftwar e , and how to use the softwar e to manage r outer configuration files and monitor r outer operations .
How t o Request Sup po rt xx M5 and M1 0 Internet Routers Har dwar e Guide.
Pa r t 1 Product Over view • System Overvie w on page 3 • Hardw are Component Ov ervie w on page 5 • JUNOS Internet Software Ov ervie w on page 2 1 • System Ar chitectur e Overvie w on page 29.
2 M5 and M1 0 Internet Routers Har dwar e Guide.
Chapter 1 Sy stem Over view This chapter provides an ov erview of the Juniper Networks M5 and M1 0 Internet router s , discussing the following topics: • System Description on page 3 • Field-Repla.
Safety Requir eme nts , W arnings , and Guidel ines • Hot-remov able and hot-insertable FR Us—Y ou can remov e and r eplace these components withou t pow ering do wn the ro uter or disrupting t he rout ing functions . • FRUs that r equire po w ering down the r outer—Y ou must power do wn the ro uter befor e remo ving these components .
Chapter 2 Hard w are Component Over view This chapter pro vides an ov erview of the hardwar e components on the M5 and M1 0 Internet ro uters: • Chassis on page 5 • P acket F orwardi ng Engine on .
Chassis Figure 1: F ront of M5 Chassis 1301 R Craft interf ace Mounting ear PICs ESD point Figure 2: F ront of M10 Chassis 1300 Craft interf ace Mounting ear PICs ESD point 6 M5 and M1 0 Internet Rout.
Chassis Figure 3: Rear of Chassis 1302 P ower supply B P ower supply A Routing Engine cov er F an tra y ESD point F orwarding Engine Board The chass is includes two electrost atic discharge (ESD) points (banana plug r eceptacles) f or electrical safety , one front and one rear , as shown in Figure 1, Fi gure 2, and Figur e 3.
Pa c ke t Fo r w ar d i n gE n g i n e Description V alue W eight, minimum configuration 57 lb (25.8 kg) Thermal output 2550 B TU/hour P acket F orwarding Engine The P acket F orwarding Engine is a mu.
Pa c ke t Fo r w ar d i n gE n g i n e • P ower distribution—The midplane distributes power t o all router components from the pow er sup plies att ached to it. • Signal connectivity—The midplane trans ports the signals e xchanged b y system components for monitoring and control purposes.
Pa c ke t Fo r w ar d i n gE n g i n e Quad-wide PICs , such as the 4-port Gigabit Et hernet and OC-48/STM-16 SONET/SDH PICs , occupy all f our slots in an FPC. Some quad-wid e PICs m ight not be supported on bo th the M5 and M1 0 router s; for mor e inf ormation, see the M5 and M1 0 Internet Routers PIC Guide .
Pa c ke t Fo r w ar d i n gE n g i n e Engine routing link-st ate updates and other p ackets destined for the router that ha ve been receiv ed through the router interfaces .
Rou ti ng E ng in e • Processor subsy stem—Manages FEB functio ns and handles exception packets . The processor has the f ollo wing components: • O n eP o w e r P C6 0 3 ep r o c e s s o r • P arity-prote c te d Level 2 ca c he • P arity-protected DRAM • EEPROM—Sto res the serial number and r evision le v el.
Rou ti ng E ng in e The Routing Engine inst alls into a slot in the FEB at the r ear of the chassis . The Routing Engine is field-replaceable , but you must power do wn the router bef ore r emo ving it from the chassis . P acket forwar ding halts until the Routing Engine is replaced and the r outer is pow ered on.
Cr aft Interf ace F or specific information about R outing Engine components (for ex ample , the capacity of th eh a r dd r i v e ) ,i s s u et h e show chassis routing-engine comm and.
Craft Interf ace F or information about the elements on the cra ft interf ace , see the following sections: • Alarm LEDs and Lamp T est Button on page 15 • Routing Engine Interface P orts and Stat.
P o w er Suppl ies • CONSOLE —Connects the Routing Engine t o a system console thr ough an RS-232 (EIA-232) serial cable . • AUX/MODEM — Connects the Routing Engine to a lapt op, modem, or other auxiliary device thr ough an RS-232 (EIA-232) serial cable .
P o we r Suppli es After pow ering off a pow er supply , wai ta tl e a s t6 0s e c o n d sb e f o r et u r n i n g it back on. Afte r poweri ng on a power supply , wait at least 60 seconds before turning it off.
P o w er Suppl ies T able 5: Electrical Specifications for AC P ower Supply Description Specification Maximum pow er output 800 W A C input voltage Nominal range: 1 00–240 V A C Operating r ange: 1 00–264 V A C A C input line frequency 4 7–6 3H z AC i n p u t c u r r e nt r ating 8–4A Output volt ages +1.
Fa n T r a y Description Specificatio n Input DC current rating 13.5 A @ –48 V Output volt ages +1.5 V , +2.5 V , +3.3 V , +5.0 V , +12 V , +12 V The DC pow er suppl ies are mark ed –48 VDC. This is the nominal v olt age associated with the battery circuit.
Cable Management System The fan tr ay is hot-r emov able and hot-insertabl e , as described in “Field-Replaceable Units (FRUs)” on page 3. F or instructions on r eplacing it, see “Replace the F an T ray” on page 82. Do not remo ve the fan t ra y f or mor e than a abo ut one minute while th e router is oper ating.
Chapter 3 JUNOS Inter net Softw are Over vie w The JUNOS Internet softwar e is especially designed f or the lar ge production netwo rks typically supported b y Internet Service Pr o viders (ISPs). It inco rporates Internet Protocol (IP) routing softwar e and softwar e for management of interf aces , networks , and the router chassis .
Routing Engine So ftwar e Components • SNMP and MIB II Processes on page 26 • Management Process on page 27 • Routing Engine K ernel on page 27 Ro u t i n g P ro t o c ol Process The JUNOS softw ar e rout ing pr otoc ol pr ocess contr ols the r outing pr otocols that run on the rout er .
Rou ti ng E ng in e So ftw are Component s • OSPF—Open Shortest P ath First, v er si on 2, is an IGP de ve loped for IP net works by the Internet Engineering T ask F orce (IETF). OSPF is a link-st ate protocol that makes r outing decisions based on the SPF algorithm.
Routing Engine So ftwar e Components IPv6 R outing Protocols The JUNOS Inte rnet softwar e implements full IP routin g functionality , providi ng support f or IP ver sion 6 (IPv6). The routing prot ocols are f ully inter operable with e xisting IP r outing pro tocol s and pro vide the scale and contr ol n ecessary f or the Internet core .
Rou ti ng E ng in e So ftw are Component s In the multicast routing table , the routing protocol pr ocess uses traffic flow and other paramet ers specified b y the multicast rou ting pr otoc ol algorithms t o select active r outes. • MPLS routing t able—Stor es MPLS label inf ormation.
Routing Engine So ftwar e Components VPNs The JUNOS soft ware supports se ver al types of VPNs: • La yer 2 VPNs—A La yer 2 VPN links a set of sites sharing comm on routing information, and whose conn ectivity is controlled by a collection of policies .
T ools for Monitor ing the Softw ar e Management Process The managemen t process starts all the other JUNOS softw are processes and the CLI when the router boots . It monitor s the running JUNOS processes and mak es all reasonable attempts to r estart any pr ocess that terminates.
Softwar e Upgrade s Software Upgrades The router is d eliver ed with the JUNOS Internet software pr einstalled. T o upgrade the softwar e , you use CLI commands to cop y a se t of softwar e images over the netw ork to memory stor age on the Routing Engine .
Chapter 4 Sy stem Architecture Over view The router ar chitecture consis ts of two major components: • P acket F orwarding Engine—P erforms La yer 2 and L ay er 3 packet switching, r oute lookups , and p acket f orw arding. • Routing Engine—Pro vides L ay er 3 routing services and netw ork management.
Pa c ke t Fo r w a rd i n gE n g i n eA r c h i t e c t u r e • Midplane—T ransports packets , notificat ions , and other signals between the PICs and the P acket F orward ing Engine (as we ll as other system components). • Phy sical Interface Car d (PIC)—Phy sically connects the router to fiber-optic or digit al network media.
Rou ti ng E ng in e Ar chitecture Figure 13: P acket Forw arding Engine Components and Data Flow 1335 = ASIC Routing Engine Midplane PIC Controller PIC Controller Packet out Packet in Distributed Buff.
Rou ti ng E ng in e Ar chitecture Figure 14: Routing Engine Architecture JUNOS software System management processes Routing protocols Control functions System processes Operating system K ernel Intel-.
Rou ti ng E ng in e Ar chitecture • Monitoring efficienc y and flexibility—The r outer supports functions such as alarm handling and packet counting on e very port , without degrading pack et-forwar ding perfo rmance . The Routing Engine constructs and maintains one or mor e routing t ables .
Rou ti ng E ng in e Ar chitecture 34 M5 and M1 0 Internet Router s Hardw are Guide.
Pa r t 2 Initial Installation • Prepar e for R outer Inst allation on page 37 • Unpack the Router on page 55 • Install the R outer on page 59 • Connect the Router and P erform Initial Configur.
36 M5 and M1 0 Internet Router s Hardw are Guide.
Chapter 5 Prepare for Router Installation This chapter describes how t o prepar e your site for inst allation of the M5 and M1 0 Internet rout ers . It discu sses the follo wing topics: • Rack R equ.
Rac k Req ui rem en t s • A 600-mm rack as defined in the four-part Equipment Engineering (EE); Eur opean telecommunications st andard f or equipment practice (document number s ET S 300 1 19-1 through 1 19-4 ) published by the European T elecommunications Standards Institute ( http://www .
Rac k Req ui rem en t s Figure 16: T ypical Center-Mount Rack Mounting rails Floor bolts 1011 (2.13 m) 7 ft 19 in. (48.3 cm) Spacing of Mounting Holes The ho les in the mounting br ackets are s paced at 2 U (3.5 in. or 8.89 cm), so the r outer can be mounted in an y rack t hat pro vides holes spaced at that dist ance .
Rou te r En vi ron me ntal T olerances Clearance Requirements for Airflow and Hardw are Maintenance When planning the installation site , you need to allow sufficient clear ance around the rack (see Figur e 17): • F or the coolin g system to function properly , the airflow around the chassis mu st be unrestricted.
Fire Safet y Requi reme nt s Description T o lerance T emperatur e Normal operation ensur ed in temperatur e range of 32° F t o 1 0 4 °F( 0 °Ct o4 0 °C ) Seismic Designed to meet Bellcor e Z one 4.
Pow e r G u i d e l in es , Requirements , and Specifications In addition, in m inute amounts of mo isture , mon oammonium pho sphate can become highly corr osive and corr odes most metals . Any equipment in a r oom in which a chemical fire e xtinguisher has been discharged is s u bj ec t to p re ma t ure f ai l ure a n d un re li a b le operation.
Pow e r G u i d e l i n e s , Requir em ents , and Specifications Site Electrical Wiring Guidelines When planning the electrical wiring at your site , co nsider the fact ors discussed in the follo wing sections . Distance Limitations f or Signaling Improperly inst alled wires can emit radi o interference .
Pow e r G u i d e l in es , Requirements , and Specifications T able 9: Component Pow er Requirements Component Pow er Requirement (W a tts) Pow er Requirement (Amps) Base system (all components ex ce.
Pow e r G u i d e l i n e s , Requir em ents , and Specifications If you plan to operate a maximally configur ed DC-pow ered r outer , we rec om me nd t ha t you pr ovision at least 13.5 A @ 48 VDC and use a facility circuit br eaker rated for 20 A minimum.
Pow e r G u i d e l in es , Requirements , and Specifications Figure 18: AC Plug T ypes Italy Europe UK A ustralia 1013 Japan Nor th Amer ica F or infor mation about the A C pow er supply , including elec trical specific ations and a descriptio n of components , see “A C P ower Sup ply” on page 17.
Pow e r G u i d e l i n e s , Requir em ents , and Specifications F or field-wiring connections, use copper conduct ors only . F or other electrical safety information, see “Electrical Safety Guidelines and W arnings” on page 135. Figure 19 sho ws how to attach the gro unding and pow er cables .
Network Cable Spe cifications and Guidelines connecting the DC pow er and grounding cables during initial inst allation, see “Connect P ower t o a DC-P ower ed Router” on page 66. F or instructions on replacing the cables on an operating r ou ter , see “Disconnect and Connect DC P ower” on page 1 08.
Network Cable Spe cifications and Guidelines Compared with multimode fiber , single-mo de fiber has high er bandwidth and can carry signals for longer distances .
Network Cable Spe cifications and Guidelines When you calculate the power budget, y ou use a wor st-case analy sis to pr ovide a mar gin of error , ev en though all the parts of an actual system do not oper ate at the w orst-case le vels .
Network Cable Spe cifications and Guidelines The follo wing ex ample uses the estimated v alues in T able 12 to calculate link loss ( LL )f o ra 2 km-long multimode link with a power budget ( P B )o f1 3d B : • Fiber attenuation f or 2 km @ 1.0 dB/km= 2 dB • Los s for f ive c onnector s @ 0.
Site Prepar ation Checklist the pow er to bring it within the allow able r ange; for short lengths of fiber , with fiber an d connecto r loss close t o z ero, an attenuator of 5 t o 1 0 dB should be s ufficient.
Site Prepar ation Checklist Item or T ask Per fo r me d By Date Notes Select the type of rack. Plan rack location, including requir ed space clearances . Secure r ack to floo r and buildi ng struct ure . A cquire cables and connect ors . Locate si tes for connection of sy stem grounding.
Site Prepar ation Checklist 54 M5 and M1 0 Internet Router s Hardw are Guide.
Chapter 6 Unpack the Router This chapter explains how t o unpack the router and v erify the parts recei ved. Before beginning, prepar e the inst allation site as described in “Prepare f or Router In.
Unpack the Router 2. P osition the carton so that the arro ws ar e pointing up. 3. Using a utility knife , cut through the sealing t ape on the t op seam of the cart on. Open the top flaps of the carton. 4. Remo ve the accessory box and packing material from the t op of the r outer .
Choose Front or Ce nter Mounting Component Quantity Front -mounting shelf 1 Mounting ears 2 PIC and PIC blank U pt o4o na nM 5r outer U pt o8o na nM 1 0r o u t e r Po w e r s u p p l y 2 Routing Engine 1 Choose F ront or Center Mounting Y ou can mount the router into either a center-mo unt rack, or into front-mount rack, four-post rack, or cabinet.
Choose Front or Ce nter Mounting 58 M5 and M1 0 Internet Router s Hardw are Guide.
Chapter 7 Install the Router Because the router w eighs between 57 lb (25.8 kg) and about 6 1 lb (27.6 kg) for the M5 r outer or 67 lb (29. 5 kg) for the M1 0 router , using a mechanical lift to install it is r ecommended.
Install t he Chass is int o the Rack • Place the rack in its p ermanent location, a llowing adequate clearance f or airflo w and maintenance , and secure it to the bui lding structure .
Chapter 8 Connect the Router and P erform Initial Configuration After installing the r outer into the r ack as desc ribed in “Initial Inst allation” on page 35, complete th e installation by connecting management and alarm de vices , PICs, and pow er cables .
Connect the Ro ute r to Management Devices Figure 21: Routing Engine Management Por ts R 1336 Red alar m LED Lamp test button Routing Engine por ts PIC online/offline buttons Y ellow alarm LED Link st.
Connect PIC Cable s Figure 22: Routing Engine Ethernet Cable Connector 1063 Connect to a Management Console or A uxiliary Device To u s e a s y s tem console to configur e and manage the Routing Engine , connect it to the CONSOLE port on the craft interface .
Connect PIC Cable s 2. If the PIC ca ble connect or port is co v ere d by a rubb er safety plug, r emove the plu g. Do not look dir ectly int o the ends of fiber-optic cables or i nto the transceiv ers on the interf ace faceplate .
Pr ovi de Powe r to t he Router Figure 24: Attach Cable to a PIC 1334 PIC PIC cable Provide P ower to the Router Connect th e router t o external po wer sour ces and pow er it on by perf orming the fo.
Pr ovide P ow er to t he R outer Connect P ower t o a DC-P o wer ed R outer Connect DC pow er t o the router by inserting po wer cables fr om external DC po wer sour ces into the q uick-connect terminals on the faceplate of each po wer supply . P ower and gr ounding cables are not supplied with the r outer .
Pr ovi de Powe r to t he Router 8. Insert the exposed end of each pow er cable s traight int o the appropriate quick-connect terminal: • Insert the positive (+) source cable into the r eturn terminal, which is labeled RTN . • Insert the negative (–) source cable int o the input terminal, which is labeled –48V .
Pr ovide P ow er to t he R outer 2. F or each power supply on an A C-power ed router , verify that the ends of the pow er cord ar e firmly plugged into the appliance inlet on the pow er supply faceplate and the external p ower sour ce recept acle .
Configur e the JUN OS In tern et Soft wa r e Configure the JUNOS Internet Software The router is s hipped with the JUNOS I nternet softw ar e preinst alled and ready to be configured when the router is po wer ed on.
Configur e the JUN OS Internet Software 7. Configure the IP addr ess an d prefix len gth for the router’s Ethernet interface . [edit] root@# set interfaces fxp0 unit 0 family inet address address/prefix-length 8. Configure t he IP address of a back up router , which is used only while the routing prot ocol is no t running.
Configur e the JUN OS In tern et Soft wa r e 1 1. Optionally , display the configur ation to v erify that it is correct. [edit] root@# show system { host-name host-name ; domain-name domain-name ; bac.
Configur e the JUN OS Internet Software 72 M5 and M1 0 Internet Router s Hardw are Guide.
Pa r t 3 Hard w are Maintenance, Replacement, and T roubleshooting Procedures • Maintain Har dwar e Components on page 75 • Replace Har d war e Components on page 8 1 • T roubleshoot Hardw are C.
74 M5 and M1 0 Internet Router s Hardw are Guide.
Chapter 9 Maintain Hardw are Components This chapter describes how to maint ain hardwar e components installed in the router . F or informatio n about returning a part to Juniper Networks for r epair or replacement, see “Return the R outer or Its Components” on page 163.
Maint ain P ack et F orwarding Engine Components F or further descript ion of the output fr om the command, see the JUNOS Intern et Softwar e Operational Mode Command R efer ence: Protocols , Class of Service , Chassis , and Management .
Maintain P ack et F orwar ding Engine Com ponents • Issue the CLI show chassis fpc pic-status command. The PIC slots in an FPC are numbered fr om 0 through 3 ,r i g h tt ol e f t : user@host> sho.
Maint ain the P ow e r Supplies T o clean the transceiver s , use an appropriate fiber-cleaning device , such as RIFOCS Fiber Optic A dap tor Cleaning W ands (part num ber 946).
Maintain the Rout ing Engine • V erify that the air flow in and out of cooling system components is not obstructed. Maintain the Routing Engine The Routing En gine installs int o a slot in the F o rwar ding Engine Board (FEB) at the rear of the c hassis , as sho wn in Figur e 3.
Maint ain the R out ing E ngine 80 M5 and M1 0 Internet Router s Hardw are Guide.
Chapter 10 Replace Hard ware Components Most of the router’s hardw are components a r e field-replaceable units (FR Us), which means that y ou can r emov e and replace them y ourself.
Rep la ce t he Fan T r ay T ool or par t Components Phillips (+) scre wdriv ers , numbers 1a n d 2 Fa n t ra y FEB PIC P ower supply (A C or DC) Rou tin g En gi ne Rubber safety cap Fiber-o ptic PIC or PIC cable Replace the F an T ray The fan tr ay inst alls int o the rear of the chassis , as shown in Figure 3.
Rep la ce t he Fan T r ay 4. Place one hand un der the fan tra y to support it and slide the tray completely out of the chassis after the fans stop spinning. Figure 26: Remove the F an T ray 1325 Install the F an T ray T o install the f an tra y , follo w this procedur e (see Figure 27): 1.
Replace P acket F o rwar ding Engine Components Figure 27: Install the F an T ray 1326 Replace Packet F orwarding Engine Components Fo r i n s t ructions on replacing P acket F orwardin g Engine compo.
Replace P acket F o rwar ding Engine Components Re m ov e t h e F E B To r e m o v e t h e F E B, fol low t hi s pro ce du re (s ee F ig ure 2 8): 1. Place an electrost atic bag or antistatic mat on a flat, stable surf ace .
Replace P acket F o rwar ding Engine Components Figure 28: Remove the FEB 1308 Install the FEB T oi n s t a l lt h eF E B ,f o l l o wt h i sp r o c e d u r e( s e eF i g u r e2 9 ) : 1. V erify that the power switch on both power supply faceplates is in the OFF ( O )p o s i t i o n .
Replace P acket F o rwar ding Engine Components Figure 29: Install the FEB 1309 Re p l a ce a P IC Up to f our regular PICs inst all into an M5 router and up t o eight regular PICs inst all into an M1 0 rout er , as shown in Figur e 1 and Figure 2. Quad-wide PICs occup y all f our slots in an FP C ro w .
Replace P acket F o rwar ding Engine Components 4. Use one of the f ollowing methods t o tak e the PIC offline: • Press and hold the PIC offline button until its failur e indicator LED lights , wh ich usually takes about 5 seconds .
Replace P acket F o rwar ding Engine Components 7. Unseat the PIC from the chassis: • F or a regular PIC, pull the right e nd of the PIC ejector lev e r aw ay fr om the PIC fac epl at e . • F or a quad-wide PIC, pull the end of each ejector lev er away fr om the PIC faceplate , to war d the outer edges of the PIC.
Replace P acket F o rwar ding Engine Components 5. Slide the PIC into the slot: • F or a regular PIC, slide the PIC into the slot u ntil about 0.5 in. (1 cm) of the PI C remains outside the slot and y ou feel some resist ance . Release the ejector lev er and gently pus h the PIC faceplate until you hear a click as the PIC contacts the midplane .
Replace P acket F o rwar ding Engine Components 8. Arrange each cable in the cable man agement system t o pre vent the cable from dislodging or developing str ess points . Secure the cable so that it is not supporting its own weight as it hangs t o the floor .
Replace P acket F o rwar ding Engine Components Figure 31: Install a PIC 1311 Re p l a ce P IC C ab le s Remo ving an d installing PIC cables does not affect r outer function, ex cept that a PIC does not r eceive or transmit dat a while its ca ble is disconnected.
Replace P acket F o rwar ding Engine Components 3. Unplug the cabl e fr om the cable connect or port. If the PIC uses fiber-optic cabl e , immediately cov er each transceiv er and the end of each cable with a rubber safety cap. Do not look di r ectly into the ends of fiber-optic cables or into the transceiv ers on the interf ace faceplate .
Replace P acket F o rwar ding Engine Components 3. Insert the cab le connect or into the cable connector port on the PIC facep late . 4. Arrange the cable in the cable management system to pre vent it fr om dislodging or dev eloping stress points . Secure the cable so that it is no t supporting its own weight as it hangs to the floor .
Replace P acket F o rwar ding Engine Components Figure 32: Connect F iber-Optic Cable to a PIC 1334 PIC PIC cable Re p l a ce a n S F P Small for m fact or pluggables (SFPs) are optical tr ansceiver s that can be remov ed from a PIC (for mor e information, see “Phy sical Interf ace Cards (PICs)” on page 9).
Replace P acket F o rwar ding Engine Components 2. A ttach an electr ostatic dischar ge (ESD) grounding strap t o your bar e wrist and connect the strap t o one of the ESD points on the chas sis. F o r more information about ESD, see “Pre v ent Elec trost atic Discharge Damage” on page 134.
Replace P acket F o rwar ding Engine Components 2. V erify that a rubber safety cap cover s the SFP transceiv er , installing one if necessary . 3. Orient the SFP over the port in the PI C suc h that .
Rep la ce Power S ys tem Components 6. Arrange the cable in the cable management sy stem to pr event the cable from dislodging or dev eloping stress point s . Secure the cabl e so that it is not supporti ng its o wn weight as it hangs t o t he floor .
Rep la ce Power Sys tem Components T o replace an A C power supply , perform the f ollowing pr ocedur es: • Remo ve an A C P ower Supply on page 99 • Install an A C P o w er Supply on page 1 00 R emo ve an A C Po we r Supply The A C power supplies ar e located at the bottom r ear of the chassis , as shown in Figur e 3.
Rep la ce Power S ys tem Components Figure 34: Remove an AC Pow er Supply 1317 I n s t a l la nA CP o w e rS u p p l y T o install an A C power supply , follo w this pr ocedure (see Fi gure 35): 1. V erify that the sw itch on the pow er supply faceplate is in the OFF ( O )p o s i t i o n .
Rep la ce Power Sys tem Components 8. Press the pow er switch on the faceplate t o the ON ( | ) position.V erify that the blue OUTPUT OK LED eventually lights steadily . After pow ering off a pow er supply , wait at least 60 seconds befor e turning it back on.
Rep la ce Power S ys tem Components Disconnect A C Po wer from the R outer T o disconnect A C power f ro m the rou ter , follo w this pr ocedure: 1. On the console or other management device c onnecte.
Rep la ce Power Sys tem Components 5. Press the po wer swit ch on the faceplate of one power supply to the ON ( | ) position. V erify that the blue OUTPUT OK LED eventually lights steadi ly . After pow ering off a pow er supply , wait at least 60 seconds befor e turning it back on.
Rep la ce Power S ys tem Components 4. Unplug the p ow er cor d fr om the appl iance inlet on t he f aceplate and f rom th e pow er source recept acle . 5. Insert the appliance coupler end of the replacement power cor d into the appliance inlet on the po wer supply faceplate and insert the plug int o an A C power source rece ptacl e .
Rep la ce Power Sys tem Components 1. A ttach an electr ostatic dischar ge (ESD) grounding strap t o your bar e wrist and connect the strap t o one of the ESD points on the chas sis. F o r more information about ESD, see “Pre v ent Elec trost atic Discharge Damage” on page 134.
Rep la ce Power S ys tem Components Figure 36: Remove a DC Power Supply 1321 Install a DC P ower Supply T o install a DC pow er supply , follo w this procedur e (see Figure 37 and Figur e 3 8): 1.
Rep la ce Power Sys tem Components 9. Thread the po wer cables thr ough the hook located on the faceplate t o the right of the quick-connect terminals . 1 0. Insert the exposed end of each pow er cable s traight into the appr opriate q uick-connect terminal: • Insert the po sitive (+) source cable into the r eturn terminal, which is labeled RTN .
Rep la ce Power S ys tem Components Figure 37: Install a DC Pow er Supply 1322 Figure 38: Connect Pow er Cables to a DC P ow er Supply 1331 RT N -48V Grounding point Grounding lug T o ground Disconnec.
Rep la ce Power Sys tem Components pe rfo rm th e fol low in g pro ce du res. Al so fo ll ow th ese pro ce du res w he n rep la ci ng t he p ower cables , grounding cable , or both: • Disconnect DC .
Rep la ce Power S ys tem Components Connect DC Po we r to the R outer Connect DC pow er t o the router by inserting po wer cables fr om external DC po wer sour ces into the q uick-connect terminals on the faceplate of each po wer supply . P ower and gr ounding cables are not supplied with the r outer .
Rep la ce Power Sys tem Components 8. Using a 3-mm flat-blade scre wdriver , turn the scre w on each quick-connect terminal clockwise to tighten the termina l connector ar ound the cable .
Rep la ce Ro ut in g E ngine Components Figure 39: Connect Pow er Cables to a DC P ow er Supply 1331 RT N -48V Grounding point Grounding lug T o ground Replace R outing Engine Components F or instruct.
Rep la ce Ro ut in g E ngine Components On some router s , the accessory box includes a plastic PC car d storage case that y ou can affix to the r outer chassis f or easy access to the PC car d. show s the recommended inst allation location for t he case and how to ins ert the PC card into the case .
Rep la ce Ro ut in g E ngine Components 2. When the PC card pops partially out of the slot, grasp the car d and pull it straight o u to ft h es l o t . Figure 40: Remove the PC Card 1332 Eject button Insert the PC Card T oi n s e r tt h eP Cc a r d ,f o l l o wt h i sp r o c e d u r e( s e eF i g u r e4 1 ) : 1.
Rep la ce Ro ut in g E ngine Components Figure 41: Inser t the PC Card 1333 Re p l a ce t he Ro ut in g E n g i n e The Routi ng Engine installs int o a slot in the FEB at the rear of the chassis , as shown in Figure 3. The Routi ng Engine weighs appr o xi mately 3 lb (1.
Rep la ce Ro ut in g E ngine Components 4. A ttach an electr ostatic dischar ge (ESD) grounding strap t o your bar e wrist and connect the strap t o one of the ESD points on the chas sis. F o r more information about ESD, see “Pre v ent Elec trost atic Discharge Damage” on page 134.
Rep la ce Ro ut in g E ngine Components 2. A ttach an electr ostatic dischar ge (ESD) grounding strap t o your bar e wrist and connect the strap t o one of the ESD points on the chas sis. F o r more information about ESD, see “Pre v ent Elec trost atic Discharge Damage” on page 134.
Rep la ce Ro ut in g E ngine Components Figure 43: Install the Routing Engine 1313 Extractor clip R eplace Connectors t o R outing Engine Interface P orts The ports o n the craft interf ace connect the Ro uting Engine to external management d e v i c e s( s e eF i g u r e4 4 ) .
Rep la ce Ro ut in g E ngine Components such cable is pro vided with the router . F or cable specifications, see “C able Specifications for Routing Engine Management Interfaces” on page 52. F ollow this procedur e: 1. If a cable is already inst alled in the MGMT port for the rele vant R outing Engine , perform the f ollowing steps: a.
Rep la ce Ro ut in g E ngine Components 1. If a cable is already installed in the CONSOLE or AUX/MODEM port, perform the follo wing steps: a. T urn o ff the pow er to the console or auxiliary device . b . U n s c r e wt h es c r e w st h a ts e c u r et h ec a b l ec o n n e c t o rt ot h ep o r t ,u s i n ga2 .
Chapter 11 T roubleshoot Hardw a re Components This chapter describes how to tr oubleshoot problems with hardw are components installed in the router .
Overvie w of T roub leshooting R esour ces F or information about using the C LI to tr oubleshoot the JUNOS Internet software , see the appropriate JUNOS Internet softw are configur ation guide. LEDs The LEDs described in the follo wing sections indicate the b asic status of hardw are components.
Overvi ew of T roub leshooting Resour ces T able 17: Chassis Alarm Messages Component CLI Message Craft interface Craft interface not responding fan-name remo ved fan-name stopped spinning F ans T oo .
T roub leshoot P ac ket F orwarding Engine Com ponents Juniper Networks T echnical Assistance Center If you need ass istance d uring tr oubleshooting, y ou can conta ct the Juniper Netw orks T echnical Assistance Center (JT A C) by e-mail or telephone .
T roubleshoot the Pow e r S y s t e m T roubleshoot the FEB If the FEB fail s , the f orw arding and r outing func tions of the r outer halt immediatel y and do not resume until the FEB f ailure has been corr ected. To t r o u b l e s h o ot an FEB, follo w these guidelines: • Make sur e the FEB is properly seated in the midplane .
T roublesh oot the Pow e r S y s t e m L E Do nB o t hS u p p l i e sI sO f f If the LED is of f on both power supply f aceplates , either someone has swit ched off pow er to the router or the system temperatur e has ex c eeded the accept able maximum.
Pa r t 4 Appendixes 127.
128 M5 and M1 0 Internet R outers Hardw ar e Guide.
Appendix A Safety and Re gulator y Compliance Information T o install and use the router safely , follow pr o per safety procedur es . This chapter discusses the follo wing safety and r egulatory comp.
Definition of Saf ety W arning L e ve ls This symbol means danger . Y ou are in a situation that could cause bodily injury . Before you w ork on any equipment, b e aw are of the haz ards involv ed with electrical circuitry and be familiar with st andard pr actices for pre venting accidents .
Safety Guid eline sa n dW a r n i n g s Safety Guidelines and W a rnings This section l ists safety guidelines and warnings for inst alling, operating, and maintaining the rout er: • General Safety .
Safety Guideline sa n dW a r n i n g s • A void spilling liquid onto the router chassis or onto any router component. Such an action could cause electric al shock or damage the router . • A void t ouching uninsulated electric al wires or terminals that have not been disconnected from their power source .
Safety Guid eline sa n dW a r n i n g s R estric ted A ccess Area W arning The router is intended f or installation in r estricted access areas . A restricted access ar ea is an area t o which access .
Safety Guideline sa n dW a r n i n g s ¡Atención! Es ta unidad ha sido diseñada para instalar se en áreas de acceso restringido. Ár ea de acceso restringido significa un ár ea a la que solamente.
Safety Guid eline sa n dW a r n i n g s Figure 47: Place a Component into an Electrostatic Bag CA UTION ELECTROST A TIC SENSITIVE DEVICES DO NOT OPEN OR HANDLE EXCEPT A T A ST A TIC-FREE WORKST A TION.
Safety Guideline sa n dW a r n i n g s General Electrical Safety G uidelines • Instal l the ro uter in compliance with the follo wing local, national, or international electrical codes: • United States —National Fir e P rotection Association (NFP A 70), United St ates National Electrical Code .
Safety Guid eline sa n dW a r n i n g s • Green and y ello w—Earth • Blue—Neutral • Bro wn—Live • When a router is equ ipped with two A C power suppl ies , both power co rds (one f or each pow er supply) must be unplugged to completely disconnect po wer to the r outer .
Safety Guideline sa n dW a r n i n g s • Because the router is a p ositive gr ound sys tem, you must connect the positive lead t o the terminal labeled RTN , the negative lead to the terminal labeled –48V , and the earth ground t o the c hassis grounding points .
Safety Guid eline sa n dW a r n i n g s Attention A vant de pratiquer l’une quelconque des procédur es ci-dessous, vérifier que le cir cuit en courant continu n’ est plus sous t ension.
Safety Guideline sa n dW a r n i n g s W h e ni n s t a l l i n gt h er o u t e r , t h eg r o u n dc o n n e c t i o nm u s ta l w a y sb em a d e first a nd disconnected last. W aar schuwing Bij de installatie v an het toestel moet de aar dverbinding altijd het eerste wor den gemaakt en het laatste worden losgemaakt.
Safety Guid eline sa n dW a r n i n g s W ar nung V erdr ahten Sie die Gleichstrom-V ersor gung mit den passenden Ansätzen am V erdrahtung Ende . W enn man Energie anschließt, wir d die korr ekte V erdrahtung. Reihenf olge gerieben, um, +R TN zu +R TN, dann -48 V bis -48 V zu reiben.
Safety Guideline sa n dW a r n i n g s Va r o it us Jos säikeellinen johdin on tarpeen, käytä hyväksyttyä johdinliitäntää, esimerkiksi suljett ua silmukkaa t ai kourumaista liitäntää, jossa on ylöspäin käännetyt kiinnityskor v at.
Safety Guid eline sa n dW a r n i n g s Va r o it us Täm ä laitteisto on tark oitettu maadoitett av aksi. V armista, että isäntälaite on yhdistetty maahan normaalikäytön aikana. Attention Cet équipement doit être r elié à la terr e . S’assurer que l’appareil hôte est relié à la terre lors de l’utilisation normale .
Safety Guideline sa n dW a r n i n g s Multiple P ow er Supplies Disconnection W arning The router has mor e than one power su pply connection. All connections must be r emov ed completely to r emove po wer fr om the unit completely .
Safety Guid eline sa n dW a r n i n g s Va r o it us Kytke irti v aihtovirtalaitteiden virt ajoht o ja katk aise tasa virtalaitteiden virt a suojakytkimellä, ennen kuin teet mitään asennuspohjalle tai työsk entelet virtalähteiden läheisyydessä.
Safety Guideline sa n dW a r n i n g s A vver tenza Il dispositivo è st at o progett at o per l’uso con sistemi di alimentazione TN, IT . Advarsel Utstyret er utfomet til bruk med TN-, IT -strømsystemer . Av i s o O dispositivo foi criado para operar com sistemas de corr ente TN, IT .
Safety Guid eline sa n dW a r n i n g s Installation Instructions W a rning Read the installation instructions before y ou connect the router to a pow er source . W aar schuwing Raadpleeg de inst allatie-aanwijzingen v oordat u het systeem met de v oedin g ve rbindt.
Safety Guideline sa n dW a r n i n g s T o prev ent bodily injury when mounting or servicing the router in a ra ck, take t he fol low ing precautions t o ensure that the system remains st able . The follo wing directiv es help maintain y our safety: • The router must be installed int o a rack that is secured to the building structure .
Safety Guid eline sa n dW a r n i n g s Attention P our éviter toute blessure corpor elle pendant les opér ations de montage ou de réparation de cette u nité en casier , il convient de prendr e des précautions spéciales afin de maintenir la stabilité du système .
Safety Guideline sa n dW a r n i n g s Advarsel Unngå fysiske sk ader under montering eller repar asjonsarbeid på denne enheten når den befinner seg i et kabinett.
Safety Guid eline sa n dW a r n i n g s ¡Atención! Pa ra evit ar lesiones durante el mont aje de este equipo sobre un bastidor , o posteriormente dur ante s u mantenimiento, se debe poner mucho cuidado en que el sistema quede bien est able .
Safety Guideline sa n dW a r n i n g s A vver tenza Non usare una rampa con pendenza superior e a 1 0 gradi. Advarsel Bruk aldri en rampe som heller m er enn 1 0 grader .
Safety Guid eline sa n dW a r n i n g s C l a s s1L a s e rP r o d u c tW a r n i n g Class 1 laser product . W aar schuwing Klasse-1 laser produkt. Va r o it us Luokan 1 lasertuote . Attention Produit laser de classe I. W ar nung Laserpr odukt der Klasse 1.
Safety Guideline sa n dW a r n i n g s Laser Beam W arning Do not star e int o the laser beam or view it directly with optical instruments . W aar schuwing Niet in de str aal staren of hem r echtstreeks bekijken met optische instrumenten. Va r o it us Älä katso säteeseen äläkä tark astele sitä suoraan optisen laitteen avulla.
Safety Guid eline sa n dW a r n i n g s W ar nung A us der P ort-Öffnung können unsichtbar e Strahlen emittier en, wenn k ein Glasfaserk abel angeschlossen ist.
Safety Guideline sa n dW a r n i n g s Va r o it us Räjähdyksen vaara, jos akku on v aihdettu väärään akkuun. Käytä vaiht amiseen ainoastaan saman- t ai vast aavantyyppistä akk ua, joka on valmist ajan suosittelema. Hävitä käytetyt akut valmist ajan ohjeiden mukaan.
Safety Guid eline sa n dW a r n i n g s Attention A vant d’accéder à cet équipement connecté aux lignes électriques , ôter tout bijou (anneaux, colliers et montres compris).
Safety Guideline sa n dW a r n i n g s Attention Ne pas tra v ailler sur le système ni brancher ou débr ancher les câbles pendant un orage . W ar nung Arbeiten Sie nicht am System und schließen Sie k eine Kabel an bzw . trennen Sie keine ab , wenn es gewittert.
Safety Guid eline sa n dW a r n i n g s Advarsel Unngå over oppheting av e ventuelle rutere i Juniper Networks router Disse sk al ikke brukes på steder der den anbefalte maksimale omgivels estemperatur en ov er stiger 40 ο C( 1 0 4 ο F).
Ag e n c y A p p r o v a l s Agency Approvals The router com plies with the follo wing standar ds: • Safety • C AN/CS A-22.2 No. 6 0950-00/UL 1950 Third Edition, Safety of Information T echnology .
Compliance State me nts f or EMC Re quir ement s • ET SI • ET S-30038 6-2 T elecommunication Network Equipment. Electromagnetic Compatibility Requir ements Compliance Statements for EMC Requirements Canada This Class A di git al appar atus complies with Canadian ICES-003.
Compliance State ments f or EM C Requir ements United States The router has been tested and found to comply with the limits f or a Class A digital de vice , pursuant t o P art 15 of the FCC Rules . These limits are designed t o pro vide reasonable protection against harmful interfer ence when the equipment is operated in a commercial environment.
Appendix B Return the Ro uter or Its C omponents This chapter describes how to r eturn the router or individual components to Juniper Networks f or repair or r eplacement: • T ools and P arts Requi .
Loc a te C o mp o ne n t Serial Number s 2. Obtain a R eturn Materials A uthorizatio n (RMA) number from the Juniper N etworks T echnical Assistance Center (JT A C). Y ou can send e-mail o r telephone as specified in “How t o Reques t Sup port” on page xix.
Loc ate C om p one nt Serial Numbers Figure 48: Serial Number ID Label 1600 The fol lowing sec tions describe the t ag location on eac h type of component: • FEB Serial Number ID Label on page 165 .
Loc a te C o mp o ne n t Serial Number s Figure 50: PIC Serial Number ID Label 1623 RX TX ST A TUS Serial number ID label AA1234 P o w e rS u p p l yS e r i a lN u m b e rI DL a b e l The serial number ID label on a po wer supply i s located on the pow er supply faceplate , as s h o w ni nF i g u r e5 1a n dF i g u r e5 2 .
Loc ate C om p one nt Serial Numbers Figure 52: DC Power Supply Serial Number ID Label 1625 SP04371A S/N : LK33319 REV : 03 REV : A 102600 P/N : 740-002498 Serial number ID label Ro u t in g E ngine Serial Number ID Lab el The location of the serial number ID label depends on the type o f Routing Engine (see Figure 53 and Figur e 54).
P ack the Router f o r Shipment Figure 54: Routing Engine 600 Serial Number ID Label 1576 Serial number ID label *1 2 3 4 5 6 7 8 9 1 0 1 2 * Pa c k t he R o uter for Shipment T o pack the router for shipment, follow this procedure: 1. Retriev e the shipping box and packing ma terials in which the router was originally shipped.
Pa c k C o m p o n e n t s f or Sh ipment 6. Remo ve the chassis fr om the rack: • If you are using a mechanical lift, place the lift platform under the chassis , un sc rew an d re move t he m ou nt in g s crews f rom t he ra ck , an d m ove th e ch as si s to the shippin gb o x .
Pa c k C o m p o n e n t s f or Sh ipment 17 0 M 5 and M1 0 Intern et Router s Hardwar e Guide.
Appendix C Cable Connec tor Pinouts This chapter describe s the pinouts for the f ollowing cable connectors: • RJ-45 Connector Pinouts f or the R outing Engine MGMT P ort on page 17 1 • DB-9 Conne.
RJ-48 Cable Pinou ts f or E1 and T1 PICs to a lapt op, modem, or other auxiliary unit, and the CONSOLE port connects it to a management console . The ports ar e configur ed as data terminal equipment (D TE). F or more information, see “Routing Engine Interf ace P orts and Status Indicators” on page 15.
RJ-48 Cable Pinou ts f or E1 and T1 PICs RJ-48 Pin (on T1/E1 PIC) (Data numberi ng form) RJ-48 Pin (Data num bering form) Signal 33 Shield/Return/Ground 66 Shield/R etur n/Ground 7 No connect No conne.
RJ-48 Cable Pinou ts f or E1 and T1 PICs T able 23: RJ-48 Connector to DB-15 Connector (Straight) Pinout RJ-48 Pin (on T 1/E1 PIC) (Data numberi ng form) DB-15 Pin (Data nu mberi ng form) Signal 11 1 .
RJ-2 1 Cable Pinou t sf o rF a s tE t h e r n e t1 2 - P o r tP I C RJ-48 Pin (on T1/E1 PIC) (Data numberi ng form) DB-15 Pin (Data num bering form) Signal 14 No connect No connec t 15 No connect No c.
RJ-2 1 Cable Pinou ts f or F ast Ethernet 12-P ort PIC T able 25: RJ-21 Pin Assignments Ethernet Por t Numbers RJ-21 Pin Assignment TX - TX + RX - RX + 02 2 7 1 2 6 1 4 29 3 28 26 3 1 5 3 0 38 3 3 7 3.
Pa r t 5 Index 177.
178 M5 and M1 0 Internet R outers Hardw ar e Guide.
Index Index A AC p o w e r c o rd connection instructions d u r i n g i n i t i a l i n s t a l l a t i o n .. .............. ....... 6 5 for maintenance or r eplacement . . . . . . . . . . . . 1 02 d i s c o n n e c t i o n i n s t r u c t i o n s ..
Index carton See shipping carton center -mount r ack See rack chassis a i r f l o w p a t h t h r o u g h....... ................ .......... 1 9 alarm messages See alarm, messages d e s c r i p t i o n ........ .............. ................ ...... 5 g r o u n d i n g p o i n t s .
Index electrost atic b a g , u s i n g t o s t o r e c o m p o n e n t s ...... ............. 1 3 4 discharge See ESD EMC (EMI) c o m p l i a n c e w i t h r e q u i r e m e n t s ...... ............. 1 6 1 s u p p r e s s i o n .. .............. ....
Index F E B ........... .............. ................ .......... 8 6 P C c a r d....... ................ .............. ......... 1 1 4 P I C .... ............. ................. ............. ..... 8 9 R o u t i n g E n g i n e ............ .......
Index P I C .... ............. ................. ............. ..... 1 6 P P acket F orwarding Engine a r c h i t e c t u r a l c o m p o n e n t s ......... ................ .. 2 9 A S I C s , d i a g r a m o f ....... .............. ............... 2 9 d a t a f l o w t h r o u g h .
Index R J - 4 5 c a b l e c o n n e c t o r p i n o u t s . ............. ........... 1 7 1 R J - 4 8 c a b l e p i n o u t s .......... .............. ............. 1 7 2 R M A n u m b e r . ............. .............. ................ 1 6 3 rou ti ng p o l i c y.
Index s u r g e p r o t e c t i o n ........... ................. ............. .. 4 3 system a r c h i t e c t u r e .. .............. ................ .......... 2 9 d e s c r i p t i o n ........ .............. ................ ...... 3 T T 1 P I C , p i n o u t s f o r R J - 4 8 c a b l e .
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