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Figure 3: A PCB with Corrosion on its Metal Contacts

EMI and Radio Frequency Interference

Electro-Magnetic interference (EMI) and radio frequency interference (RFI) from a system can adversely
affect devices such as radio and television (TV) receivers operating near the system. Radio frequencies
emanating from a system can also interfere with cordless and low-power telephones. Conversely, RFI from
high-power telephones can cause spurious characters to appear on the system monitor. RFI is defined as any
EMI with a frequency above 10 kilohertz (kHz). This type of interference can travel from the system to other
devices through the power cable and power source, or through the air in the form of transmitted radio waves.
The Federal Communications Commission (FCC) publishes specific regulations to limit the amount of EMI
and RFI emitted by computing equipment. Each system meets these FCC regulations.

When wires are run for any significant distance in an electromagnetic field, interference can occur between
the field and the signals on the wires. This fact has two implications for the construction of plant wiring:

• Bad wiring practice can result in radio interference emanating from the plant wiring.

• Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers

and receivers in the chassis, and even create an electrical hazard by conducting power surges through
lines into equipment.

Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide

15

Preparing for Installation

EMI and Radio Frequency Interference

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Содержание Catalyst 9200CX Compact Series

Страница 1: ... Series Switches Hardware Installation Guide First Published 2022 08 11 Americas Headquarters Cisco Systems Inc 170 West Tasman Drive San Jose CA 95134 1706 USA http www cisco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 527 0883 ...

Страница 2: ...0 100 1000 Ports 3 PoE and PoE Ports 3 C9200CX 12T only PD Port 4 USB Type A Port 4 USB Micro B Port 4 SD Card Slot 4 Uplink Ports 5 Rear Panel 6 RFID Tag 6 Auxiliary Power Adapter 6 Internal Power Supply 7 Network Configurations 7 Preparing for Installation 9 C H A P T E R 2 Safety Warnings 9 Installation Guidelines 11 Site Requirements 12 Cisco Catalyst 9200CX Compact Series Switches Hardware In...

Страница 3: ... Under a Desk or a Shelf 30 Mounting the Switch Using Rack Mount Brackets 34 Mounting the Switch on a DIN Rail 35 Connecting the System Ground 37 Attaching the Adapter Bracket to the Switch Optional 38 Installing the Power Cord Retainer Optional 41 Installing the Cable Guard Optional 43 Installing an SFP or SFP Module 45 10 100 1000 PoE and PoE Port Connections 46 10 100 1000 Ethernet Port Connect...

Страница 4: ...oft Windows USB Driver 51 Uninstalling the Cisco Microsoft Windows USB Driver 51 Technical Specifications 53 A P P E N D I X A Environmental and Physical Specifications 53 Switch LEDs 55 A P P E N D I X B LEDs 55 System LED 56 Status STAT LED 57 Speed LED 57 PoE LED 57 Port LEDs and Modes 57 PD Power LED 59 Beacon LED 59 Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide iv ...

Страница 5: ...tal letters but are not case sensitive or Ctrl Commands and keywords and user entered text appear in bold font bold font Document titles new or emphasized terms and arguments for which you supply values are in italic font Italic font Terminal sessions and information the system displays appear in courier font Courier font Bold Courier font indicates text that the user must enter Bold Courier font ...

Страница 6: ...ake note Notes contain helpful suggestions or references to material not covered in the manual Note Means the following information will help you solve a problem Tip Means reader be careful In this situation you might do something that could result in equipment damage or loss of data Caution Means the described action saves time You can save time by performing the action described in the paragraph...

Страница 7: ...cumentation and Submitting a Service Request For information on obtaining documentation submitting a service request and gathering additional information see the monthly What s New in Cisco Product Documentation which also lists all new and revised Cisco technical documentation at http www cisco com c en us td docs general whatsnew whatsnew html Subscribe to the What s New in Cisco Product Documen...

Страница 8: ...Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide viii Preface Obtaining Documentation and Submitting a Service Request ...

Страница 9: ...ered using 315W internal power supply unit fanless C9200CX 8P 2X2G 12x1G PoE ports 2x1G and 2x10G SFP fixed uplink ports powered using 315W internal power supply unit fanless C9200CX 12P 2X2G 12x1G Ethernet ports 3x1G Copper and 2x10G SFP uplink ports provides power either from one of the 3 copper uplink ports as Class 6 PD port or using an external auxiliary power adapter fanless C9200CX 12T 2X2G...

Страница 10: ...G Switch 2x10G SFP uplink ports 7 SD Card slot 1 Internal power supply connector 8 SD Card security lock 2 USB Type A connector 9 Blue Beacon 3 Mode button 10 Status LEDs 4 USB micro Type B console port 11 10 100 1000 PoE ports 5 2x1G copper uplink ports 6 Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 2 Product Overview Front Panel Components ...

Страница 11: ...oE and PoE ports provide the following functionality PoE PoE ports Support for IEEE 802 3af compliant powered devices up to 15 4W PoE per port and support for IEEE 802 3at compliant powered devices up to 30W PoE per port Support for pre standard Cisco powered devices Configurable support for Cisco intelligent power management including enhanced power negotiation power reservation and per port powe...

Страница 12: ...on If the boot image and configuration are available these are copied to flash for the reboot USB Micro B Port The USB Micro B port on the front panel that provides administrative access to the switch through a console terminal or a PC It allows you to use a PC Mac or Linux machine with the appropriate drivers to connect to the USB micro Type B port and gain access to the console port on the switc...

Страница 13: ...treme end to prevent it from damaging Note 2 Uplink Ports The C9200CX compact switches provide fixed uplink ports that support 10G SFP and 1G SFP modules For information about installing an optic module see Installing an SFP or SFP Module on page 45 The SFP uplink ports and copper uplink ports on the switch can function simultaneously Cisco Catalyst 9200CX Compact Series Switches Hardware Installa...

Страница 14: ...tification RFID on Cisco Catalyst 9000 Family Switches White Paper Auxiliary Power Adapter C9200CX 12T 2X2G switches can be powered either through the 1G copper uplink port connected to a PoE PSE port capable of providing IEEE 802 3bt Class 6 power or through an auxiliary AC DC PWR ADPT or DC DC C9K ADPT DC power adapter If the switch has both PD power and auxiliary power adapter connected the aux...

Страница 15: ...o an AC power outlet Table 2 Available PoE with AC Power Supply Available PoE Default Power Supply Models 240W 315W Internal C9200CX 12P 2X2G 240W 315W Internal C9200CX 8P 2X2G Network Configurations See the switch software configuration guide for network configuration concepts and examples of using the switch to create dedicated network segments and interconnecting the segments through Fast Ether...

Страница 16: ...Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 8 Product Overview Network Configurations ...

Страница 17: ... heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals Statement 43 Warning Ethernet cables must be shielded when used in a central office environment Statement 171 Warning Read the wall mounting instructions carefully before beginning installation Failure to use the correct hardware or to follow the correct procedures could result in a ha...

Страница 18: ...g socket combination must be accessible at all times because it serves as the main disconnecting device Statement 1019 Warning Use copper conductors only Statement 1025 Warning This unit might have more than one power supply connection All connections must be removed to de energize the unit Statement 1028 Warning Only trained and qualified personnel should be allowed to install replace or service ...

Страница 19: ...he switch front and rear panel meets these conditions Front panel LEDs can be easily read AC power cord reaches from the power outlet to the connector on the switch Cabling is away from sources of electrical noise such as radios power lines and fluorescent lighting fixtures Make sure that the cabling is safely away from other devices that might damage the cables Installation temperature should be ...

Страница 20: ...stem over temperature conditions leading to premature component failure Poor equipment placement can make chassis panels inaccessible and difficult to maintain The switch requires a dry clean well ventilated and air conditioned environment To ensure normal operation maintain ambient airflow If the airflow is blocked or restricted or if the intake air is too warm an over temperature condition may o...

Страница 21: ...ther particles if ingested cause contaminant buildup in the system and increase the internal chassis temperature A clean operating environment can greatly reduce the negative effects of dust and other particles which act as insulators and interfere with the mechanical components in the system The standards listed below provide guidelines for acceptable working environments and acceptable levels of...

Страница 22: ...ts form insulating layers on circuits and causes electronic failure short circuits pitting and metal loss A type of corrosion known as creep corrosion that primarily affects PCBA Printed Circuit Board Assembly occurs when the PCBA is subjected to a harsh and sulfur rich hydrogen sulfide end use environment over a prolonged period of time The corrosion begins on certain exposed metals such as coppe...

Страница 23: ... form of transmitted radio waves The Federal Communications Commission FCC publishes specific regulations to limit the amount of EMI and RFI emitted by computing equipment Each system meets these FCC regulations When wires are run for any significant distance in an electromagnetic field interference can occur between the field and the signals on the wires This fact has two implications for the con...

Страница 24: ...ype 2 4 or 4a ports as described in GR 1089 and require isolation from the exposed OSP cabling The addition of Primary Protectors is not sufficient protection in order to connect these interfaces metallically to an OSP wiring system Warning Power Source Interruptions Systems are especially sensitive to variations in voltage supplied by the AC power source Overvoltage undervoltage and transients or...

Страница 25: ...dations and codes Best grounding practices must be closely followed High Commercial building is subjected to direct lightning strikes For example some places in the United States such as Florida are prone to more lightning strikes than other areas Best grounding practices must be closely followed High Commercial building is located in an area where lightning storms occur frequently but is not pron...

Страница 26: ...ow these guidelines Do not work alone if potentially hazardous conditions exist anywhere in your work space Never assume that power is disconnected from a circuit always check the circuit before working on it Look carefully for possible hazards in your work area such as damp floors ungrounded power extension cables frayed or damaged power cords and missing safety grounds If an electrical accident ...

Страница 27: ...ation Before you install the switch in a rack or on a table or shelf power on the switch and verify that it passes POST To power on the switch plug one end of the AC power cord into the switch AC power connector and plug the other end into an AC power outlet As the switch powers on it begins the POST a series of tests that runs automatically to ensure that the switch functions properly LEDs can bl...

Страница 28: ...Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 20 Preparing for Installation Verifying Switch Operation ...

Страница 29: ...n page 46 10 100 1000 Ethernet Port Connections on page 47 Shipping Box Contents The shipping box contains the model of the switch you ordered and other components needed for installation Some components are optional depending on your order Verify that you have received these items If any item is missing or damaged contact your Cisco representative or reseller for instructions Verify that you have...

Страница 30: ... C9K CMPCT DIN MNT 4 Optional Auxiliary Power Adapter C9K ADPT DC 12 Optional Wall mount tray C9K WALL TRAY 5 Optional Power cord retainer C9K CMPCT PWR CLP 13 Optional Power adapter bracket C9K ADPT BRKT 12T 6 Optional USB Type B to RJ45 adapter CAB CON USB 14 Optional Cable guide C9K CMPCT CBLE GRD 7 1 Available to order with C9200CX 8P 2X2G and C9200CX 12P 2X2G switches For C9200CX 12T 2X2G pow...

Страница 31: ...helf Mounting using the Mounting Tray and Magnet Shelf or top bottom of a desk mount Mounting the Switch on a DIN Rail Din rail mount Mounting on a Desk or Shelf Without Mounting Screws Procedure Step 1 Locate the adhesive strip with the rubber feet in the accessory kit Step 2 Remove the four rubber feet from the adhesive strip and attach them to the locations indicated at the bottom of the unit T...

Страница 32: ...lustrations in this procedure shows how to mount the switch on a desk You can follow similar procedure to mount the switch on a wall Do not wall mount the switch with its front panel facing up Following safety regulations wall mount the switch with its front panel facing down or to the side to allow sufficient airflow and to provide easier access to the cables Caution To avoid thermal issues do no...

Страница 33: ...illips pan head screws in to the slots on the mounting tray and tighten them Figure 5 Attaching the Mounting Tray to the Desk or Shelf Desk 3 Three 8 18 Phillips pan head screws 1 Mounting tray 2 Step 4 Place the switch on the mounting tray slide it slightly forward so that the mounting tray hooks on both the sides engage with the switch Cisco Catalyst 9200CX Compact Series Switches Hardware Insta...

Страница 34: ...triction allow clearance around the ventilation openings to be at least 3 in 7 6 cm Statement 1076 Warning Step 5 Secure the switch to the mounting tray using the screws provided Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 26 Installing a Compact Switch Mounting using the Mounting Tray and Screws ...

Страница 35: ...n a metal surface The illustrations used in the procedure shows how to mount the switch on a metal desk You can use a similar procedure to mount the switch on a metal wall or under a metal desk Do not use the magnet without a mounting tray Caution Before you begin Ensure you have the following accessories available Mounting tray and magnet for compact switches C9K MGNT TRAY Two 10 32 Phillips pan ...

Страница 36: ...y on the Magnet Magnet 2 Mounting tray 1 Step 2 Place the switch on the mounting tray and secure it using the two 10 32 Phillips pan head screws Figure 9 Securing the Switch to the Mounting Tray Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 28 Installing a Compact Switch Mounting using the Mounting Tray and Magnet ...

Страница 37: ... or to follow the correct procedures could result in a hazardous situation to people and damage to the system Statement 378 Warning Do not wall mount the switch with its front panel facing up Following safety regulations wall mount the switch with its front panel facing down or to the side to allow sufficient airflow and to provide easier access to the cables Caution To prevent airflow restriction...

Страница 38: ...18 Phillips pan head screws Two 10 32 Phillips pan head screws Screwdriver Procedure Step 1 Use the desk mount to align the screw holes and also as a guide to make sure that you install the screws under the desk or shelf with proper clearance Step 2 Use a 0 144 inch 3 7 mm or a 27 drill bit to drill a hole 1 2 inches 12 7 mm deep on the desk or shelf Step 3 Insert the screws in to the slots on the...

Страница 39: ...esk 1 Desk mount 2 Step 4 Place the switch on the mounting tray slide it slightly forward so that the mounting tray hooks on both the sides engage with the switch Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 31 Installing a Compact Switch Mounting Under a Desk or a Shelf ...

Страница 40: ...n allow clearance around the ventilation openings to be at least 3 in 7 6 cm Statement 1076 Warning Step 5 Secure the switch to the desk mount using the three 10 32 Phillips pan head screws provided Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 32 Installing a Compact Switch Mounting Under a Desk or a Shelf ...

Страница 41: ...r a Desk or Shelf Two 10 32 Phillips pan head screws 1 Figure 14 The Switch in Installed Position Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 33 Installing a Compact Switch Mounting Under a Desk or a Shelf ...

Страница 42: ...brackets to the switch by attaching one Phillips flat head screws on each side of the switch Figure 15 Attaching Brackets for 19 inch Racks 10 32 Phillips flat head screws 2 19 inch rack mounting bracket 1 Step 2 Secure the brackets to the rack by attaching the supplied Phillips machine screws two screws on each sides Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 34 Ins...

Страница 43: ...to allow sufficient airflow and to provide easier access to the cables Caution To prevent airflow restriction allow clearance around the ventilation openings to be at least 3 in 7 6 cm Statement 1076 Warning Before you begin Ensure you have the following DIN Rail Mount C9K CMPCT DIN MNT 10 32 Phillips flat head screws Phillips screwdriver Cisco Catalyst 9200CX Compact Series Switches Hardware Inst...

Страница 44: ... mount clip locks into place with a click Figure 17 Attaching the DIN Rail Mount to the DIN Rail Release tab 3 DIN rail mount 1 DIN rail Note that the DIN rail is not part of the DIN Rail Mount kit Note 2 Step 3 Place the switch on to the DIN rail mount and secure it using the two 10 32 Phillips pan head screws Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 36 Installing...

Страница 45: ...ing cable from the chassis grounding lug to the rack Figure 19 Connecting the System Ground Procedure Step 1 Use a wire stripping tool to remove approximately 0 5 inch 12 7 mm 0 02 inch 0 5 mm of the covering from the end of the grounding wire Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 37 Installing a Compact Switch Connecting the System Ground ...

Страница 46: ...ttaching the Grounding Lug 3 8 length 10 32 screw 3 Location of the system ground lug 1 Grounding lug 2 Step 6 Connect the other end of the grounding wire to an appropriate grounding point at your site or to the rack Attaching the Adapter Bracket to the Switch Optional If you are using an auxiliary power adapter to power the switch which is placed on a mounting tray or a DIN rail mount you can use...

Страница 47: ...Phillips pan head screws 1 Mounting tray 4 8 18 x 0 5 Phillips pan head tapping screw 2 The power adapter bracket cannot be used without a mounting tray or a DIN rail mount Note Step 2 Thread the velcro straps through the slots on the adapter bracket that corresponds to the size of the adapter You can thread the strap based on the size of the power adapter The following illustration displays some ...

Страница 48: ...apter bracket and secure it using the velcro straps provided Figure 23 Securing the Power Adapter to the Adapter Bracket Velcro strap 2 Power adapter 1 Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 40 Installing a Compact Switch Attaching the Adapter Bracket to the Switch Optional ...

Страница 49: ...ainer strap to the switch using the M3 pan head screw provided Figure 24 Attaching the Power Cord Retainer Strap Power cord retainer strap 2 M3x6mm pan head screw 1 Step 2 Slide the retainer clamp around the AC power cord and position it closest to the connector on the adapter Depending on the width of the power cord adjust the size of the retainer clamp if required Note Cisco Catalyst 9200CX Comp...

Страница 50: ...ugh the latch at the bottom of the clamp and press the tabs on the retainer clamp towards each other to secure the power cord Figure 26 Locking the Retainer Clamp Pressing the tabs on the retainer clamp 1 Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 42 Installing a Compact Switch Installing the Power Cord Retainer Optional ...

Страница 51: ... cable guard is shipped with the following items Two 10 32 Phillips pan head screws Two 8 18 Phillips pan head screws Procedure Step 1 Use the supplied 10 32 pan head screws to attach the cable guard to the switch Figure 27 Attaching the Cable Guard to the Switch Two 10 32 pan head screws 2 Cable Guard 1 Step 2 Pivot the cable guide upwards and install the cables Cisco Catalyst 9200CX Compact Seri...

Страница 52: ... of the cable guard and pivot the cable guide back to the original position as shown in the following figure Step 4 Lock the cable guide in the installed position using the two 8 18 Phillips pan head screws provided Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 44 Installing a Compact Switch Installing the Cable Guard Optional ...

Страница 53: ...Do not remove the dust plugs from the modules or the rubber caps from the fiber optic cable until you are ready to connect the cable The plugs and caps protect the module ports and cables from contamination and ambient light To prevent ESD damage follow your normal board and component handling procedures when connecting cables to the switch and other devices Removing and installing an SFP or SFP m...

Страница 54: ... has a bale clasp latch close it Step 6 For fiber optic SFP or SFP modules remove the dust plugs and save Step 7 Connect the required cables 10 100 1000 PoE and PoE Port Connections The ports provide PoE support for devices compliant with IEEE 802 3af and 802 3at PoE and also provide Cisco prestandard PoE support for Cisco IP Phones and Cisco Aironet Access Points On a per port basis you can contr...

Страница 55: ...1 Connect one end of the cable to the switch PoE port Step 2 Connect the other end of the cable to an RJ 45 connector on the other device The port LED turns on when both devices have established link The port LED is amber while STP discovers the topology and searches for loops This process takes about 30 seconds and then the port LED turns green If the LED is off the other device might not be turn...

Страница 56: ...detects the required cable type for copper Ethernet connections and configures the interface accordingly If auto MDIX is disabled use the guidelines in this table to select the correct cable Table 5 Recommended Ethernet Cables When Auto MDIX is Disabled Straight Through Cable Crossover Cable Device No Yes Switch to switch No Yes Switch to hub Yes No Switch to computer or server Yes No Switch to ro...

Страница 57: ...switch through a terminal emulation program If you have stacked your switches connect to the console port of one of the switches in the stack You can initially configure the entire stack from any member switch Note Connecting the RJ45 Console Port Procedure Step 1 Connect the RJ45 port to the serial port on the terminal server or your PC using the optional RJ45 to DB9 adapter cable Connect the oth...

Страница 58: ... emulation program on the PC or the terminal The program frequently a PC application such as Putty or TeraTerm makes communication between the switch and your PC or terminal possible Step 4 Configure the baud rate and character format of the PC or terminal to match the console port default characteristics 9600 baud 8 data bits 1 stop bit No parity None flow control Step 5 Power on the switch as de...

Страница 59: ...mpleted window appears Click Finish Step 6 Connect the USB cable to the PC and the switch console port The USB console port LED turns green and the Found New Hardware Wizard appears Follow the instructions to complete the driver installation Uninstalling the Cisco Microsoft Windows USB Driver Uninstalling the Cisco Microsoft Windows USB Driver Before you begin Disconnect the switch console termina...

Страница 60: ...Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 52 Configuring the Switch Uninstalling the Cisco Microsoft Windows USB Driver ...

Страница 61: ...ting temperature can be limited by the type of SFP used Refer to the Datasheet for information about specific restrictions Operating temperature 3 40 to 158 F 40 to 70 C Storage temperature 5 to 90 non condensing Relative humidity Up to 5000 ft 1500 m Operating altitude Up to 15 000 ft 4500 m Storage altitude 3 Minimum ambient temperature for cold start is 32 F 0 C Table 7 Physical Specifications ...

Страница 62: ...e 8 Weight Measurements Weight Switch Model 6 6 lb 2 99 kg C9200CX 8P 2X2G 6 6 lb 2 99 kg C9200CX 12P 2X2G 4 1 lb 1 86 kg C9200CX 12T 2X2G Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 54 Technical Specifications Technical Specifications ...

Страница 63: ...Speed LED on page 57 PoE LED on page 57 Port LEDs and Modes on page 57 PD Power LED on page 59 Beacon LED on page 59 LEDs Switch Front Panel LEDs You can use the switch LEDs to monitor switch activity and its performance Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 55 ...

Страница 64: ...ot powered on Off System is operating normally Green System is loading the software Blinking green System is receiving power but is not functioning properly Amber Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 56 Switch LEDs System LED ...

Страница 65: ... Color PoE mode is not enabled None of the 10 100 1000 ports have been denied power or are in a fault condition Off PoE mode is enabled and Port LEDs function as described in Port LEDs and Modes on page 57 Green Port LEDs and Modes Each Ethernet port has a port LED These port LEDs as a group or individually display information about the switch and about the individual ports To select or change a m...

Страница 66: ...ng at 100 Mb s Green Port is operating at 1000 Mb s Blinking green on for 100 ms off for 1900 ms Port is operating at 10 Mb s Off Uplink ports with 1G SFP module installed Port is operating at 100 Mb s Green Port is operating at 1000 Mb s Blinking green Port is not operating Off Uplink ports with 10G SFP module installed Port is operating at 10 Gb s Green Port is operating at 1 Gb s Blinking green...

Страница 67: ...ngle Signature PD is not detected UPOE system if using 802 3bt mode can power up the system Auxiliary power input is of high priority and will be used if available Amber Beacon LED The beacon LED on the front panel of the switch can be turned on by the administrator to indicate that the switch needs attention It helps the administrator identify the switch The beacon can be turned on by either pres...

Страница 68: ...Cisco Catalyst 9200CX Compact Series Switches Hardware Installation Guide 60 Switch LEDs Beacon LED ...

Страница 69: ...co could void the FCC approval and negate your authority to operate the product The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California Berkeley UCB as part of UCB s public domain version of the UNIX operating system All rights reserved Copyright 1981 Regents of the University of California NOTWITHSTANDING ANY OTHER WARRANTY HEREIN...

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