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Chapter 1

Overview

The AT-GS950/48 Gigabit Ethernet Smart switch is a Layer 2 Gigabit
Ethernet switch designed to simplify the task of creating or expanding an
Ethernet, Fast Ethernet, or Gigabit Ethernet network.

This chapter contains the follows sections:

“Features” on page 16

“Front and Back Panels” on page 17

“Ports” on page 18

“LEDs” on page 19

“Power Supply” on page 21

“Ethernet Switching Basics” on page 22

“Network Topologies” on page 25

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Содержание AT-GS948

Страница 1: ...613 000535 Rev B Gigabit Ethernet Smart Switch AT GS950 48 Installation Guide ...

Страница 2: ...entioned herein are trademarks or registered trademarks of their respective owners Allied Telesis Inc reserves the right to make changes in specifications and other information contained in this document without prior written notice The information provided herein is subject to change without notice In no event shall Allied Telesis Inc be liable for any incidental special indirect or consequential...

Страница 3: ...imits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with instructions may cause harmful interference to radio or television reception which can be determined by turning the equipment off and on The user is encouraged to try to c...

Страница 4: ...y Statements Important The indicates that a translation of the safety statement is available in a PDF document titled Translated Safety Statements 613 000405 posted on the Allied Telesis website at www alliedtelesis com ...

Страница 5: ...nd Flow Control 23 Network Topologies 25 Power Workgroup Topology 25 Collapsed Backbone 26 Chapter 2 Installation 27 Reviewing Safety Precautions 28 Selecting a Site for the Switch 30 Cabling 31 Unpacking the Switch 32 Installing the Switch on a Desktop 33 Installing the Switch in a Rack 34 Installing an Optional SFP Transceiver 37 Cabling and Powering On the Switch 39 Connecting the Twisted Pair ...

Страница 6: ...Contents 6 ...

Страница 7: ...gure 7 Attaching the Rack Mount Bracket 34 Figure 8 Mounting the Switch on the Rack 34 Figure 9 Removing the Dust Plug from the SFP Slot 37 Figure 10 Inserting the SFP 38 Figure 11 Connecting the Twisted Pair Data Cables 39 Figure 12 Removing the Dust Plug from the SFP 40 Figure 13 Connecting the Fiber Optic Cable 40 Figure 14 Plugging in the AC Power Cord 40 Figure 15 AT S87 Management Software M...

Страница 8: ...Figures 8 ...

Страница 9: ...9 Table 1 Safety Symbols 12 Table 2 Power LED 19 Table 3 10 100Base T POE Port LEDs 20 Table 4 Twisted Pair Cabling and Distances 31 Tables ...

Страница 10: ...Tables 10 ...

Страница 11: ...ions on how to install the AT GS950 48 Gigabit Ethernet Smart switch This preface contains the following sections Safety Symbols Used in this Document on page 12 Where to Find Web based Guides on page 13 Contacting Allied Telesis on page 14 ...

Страница 12: ...es the safety symbols defined in Table 1 Table 1 Safety Symbols Symbol Meaning Description Caution Performing or omitting a specific action may result in equipment damage or loss of data Warning Performing or omitting a specific action may result in electrical shock ...

Страница 13: ...here to Find Web based Guides The installation and user guides for all Allied Telesis products are available in portable document format PDF on our web site at www alliedtelesis com You can view the documents online or download them onto a local workstation or server ...

Страница 14: ... materials authorization RMA number A product sent to Allied Telesis without an RMA number will be returned to the sender at the sender s expense To obtain an RMA number contact the Allied Telesis Technical Support group at our web site www alliedtelesis com support rma Select your country from the list displayed on the website Then select the appropriate menu tab Sales or Corporate Information Yo...

Страница 15: ... simplify the task of creating or expanding an Ethernet Fast Ethernet or Gigabit Ethernet network This chapter contains the follows sections Features on page 16 Front and Back Panels on page 17 Ports on page 18 LEDs on page 19 Power Supply on page 21 Ethernet Switching Basics on page 22 Network Topologies on page 25 ...

Страница 16: ...h RJ 45 connectors Four small form factor pluggable SFP ports Auto MDI MDI X on the twisted pair ports IEEE 802 3 and IEEE 802 3u compliant IEEE 802 3x flow control in full duplex operation back pressure in half duplex operation Store and forward switching mode MAC address table capacity of up to 8K addresses with automatic aging Web based configuration using the AT S87 management software ...

Страница 17: ...1 AT GS950 48 and Front and Back Panels 1075 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45R 47R 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46R 48R 45 46 47 48 POWER CLASS 1 LASER PRODUCT AT GS950 48 48 Port 10 100 1000 Mbps WebSmart Switch with 4 Combo SFP Ports LINK 1000M ACT 100M 10M PORT ACTIVITY SFP 10 100 1000Base Twisted Pair Ports 1025 SFP Ports ...

Страница 18: ...switch to set the duplex mode for each port correctly the end nodes that you connect to the switch ports should also use Auto Negotiation Otherwise a duplex mode mismatch can occur affecting network performance For further information refer to Duplex Mode on page 22 Each twisted pair port has a maximum operating distance of 100 m 328 feet For 10 Mbps operation Category 3 or better 100 ohm shielded...

Страница 19: ...has a power LED as shown in Figure 2 Figure 2 Power LED Table 2 describes the Power LED Port LEDs Ports 1 through 48 each have two LEDs as shown in Figure 2 and described in Table 3 Figure 3 Port LEDs Table 2 Power LED State Description Off The switch is not receiving power On The switch is receiving power 1077 1 3 5 7 2 4 6 8 POWER Power LED 1078 1 3 5 7 2 4 6 8 POWER Port LEDs ...

Страница 20: ...king Green The port is transmitting or receiving data Off No link is established on the port 100M Green A valid 1000 Mbps link is established between the uplink port and the end node Amber A valid 100 Mbps link is established between the uplink port and the end node Off A valid 10 Mbps link is established between the port and the end node ...

Страница 21: ...wer supply with a single AC power supply socket on the back panel which features autoswitch AC inputs To power the switch on or off connect or disconnect the power cord provided with the switch A power cord is supplied with the switch Note For the power requirements refer to Power Specifications on page 45 ...

Страница 22: ... where each address was learned When the switch receives a packet it also examines the destination address and by referring to its MAC address table determines the port on which the destination end node is connected It then forwards the packet to the appropriate port and on to the end node This increases network bandwidth by limiting each frame to the appropriate port when the intended end node is...

Страница 23: ...s the method for receiving and transmitting frames When a Ethernet frame is received on a switch port the switch does not retransmit the frame out the destination port until it has received the entire frame and stored the frame in a port buffer It then examines the frame to determine if it is a valid frame Invalid frames such as fragments or runts are discarded by the switch This ensures that only...

Страница 24: ... specified in the IEEE 802 3x standard to stop the transmission of data from an end node Whenever the switch wants an end node to stop transmitting data it issues this frame The frame instructs the end node to cease transmission The switch continues to issue PAUSE frames until it is ready again to receive data from the end node This is referred to as flow control The AT GS950 48 Gigabit Ethernet S...

Страница 25: ...orkstation or end node is connected directly to a port on the AT GS950 48 Gigabit Ethernet Smart switch Each end node has a dedicated data link to the switch for best performance and reliability The devices can operate at 100 Mbps or 1000 Mbps Figure 4 Power Workgroup Topology 1075 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45R 47R 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3...

Страница 26: ...amount of unnecessary data traffic in each workgroup freeing up bandwidth and improving network performance Figure 5 Collapsed Backbone Hub Topology 1075 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45R 47R 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46R 48R 45 46 47 48 POWER CLASS 1 LASER PRODUCT AT GS950 48 48 Port 10 100 1000 Mbps WebSmart Switch with 4 Combo S...

Страница 27: ...ecting a Site for the Switch on page 30 Cabling on page 31 Unpacking the Switch on page 32 Installing the Switch on a Desktop on page 33 Installing the Switch in a Rack on page 34 Installing an Optional SFP Transceiver on page 37 Cabling and Powering On the Switch on page 39 Starting a Management Session on page 42 ...

Страница 28: ... the LAN cables E1 Warning Do not work on equipment or cables during periods of lightning activity E2 Warning Power cord is used as a disconnection device To de energize equipment disconnect the power cord E3 Warning Class I Equipment This equipment must be earthed The power plug must be connected to a properly wired earth ground socket outlet An improperly wired socket outlet could place hazardou...

Страница 29: ...oading E25 If installed in a closed or multi unit rack assembly the operating ambient temperature of the rack environment may be greater than the room ambient temperature Therefore consideration should be given to installing the equipment in an environment compatible with the manufacturer s maximum rated ambient temperature Tmra E35 Caution Installation of the equipment in a rack should be such th...

Страница 30: ... power outlet for the switch should be located near the unit and should be easily accessible The site should provide for easy access to the ports on the front of the switch This will make it easy for you to connect and disconnect cables as well as view the switch s LEDs To allow proper cooling of the switch air flow around the unit and through its vents on the side and rear should not be restricte...

Страница 31: ...ou can use either a straight through or crossover twisted pair cable when connecting any network device to a twisted pair port on the switch Table 4 Twisted Pair Cabling and Distances Speed Type of Cable Maximum Operating Distance 10 Mbps Category 3 or better 100 ohm shielded or unshielded twisted pair cable 100 m 328 ft 100 Mbps Category 5 or Category 5E Enhanced 100 ohm shielded or unshielded tw...

Страница 32: ...u need to return the unit to Allied Telesis 2 Place the switch on a level secure surface 3 Ensure that the following hardware components are included in your switch package If any item is missing or damaged contact your Allied Telesis sales representative for assistance One AT GS950 48 Gigabit Ethernet Smart switch and the following Two rack mount brackets Six rack mount bracket screws Four rubber...

Страница 33: ...ging material in a safe place 2 Turn the switch over and attach the four rubber feet to the bottom of the switch as shown in Figure 6 Figure 6 Attaching the Rubber Feet 3 Turn the switch over again and place it on a flat secure surface such as a desk or table leaving ample space around the unit for ventilation 1079 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45R 47R 2 4 6 8 10 12 ...

Страница 34: ...e used to securely mount the switch on the rack Figure 7 Attaching the Rack Mount Bracket 3 Repeat step 2 to attach the remaining bracket to the other side of the switch 4 Mount the switch on a 19 inch rack as shown in Figure 8 Figure 8 Mounting the Switch on the Rack 45R 47R 46R 48R 45 46 47 48 CLASS 1 LASER P RODUCT AT GS950 48 48 Port 10 100 1000 Mbps WebSmart Switch with 4 Combo SFP Ports LINK...

Страница 35: ...d earth ground socket outlet An improperly wired socket outlet could place hazardous voltages on accessible metal parts E4 Pluggable Equipment The socket outlet shall be installed near the equipment and shall be easily accessible E5 Caution Air vents must not be blocked and must have free access to the room ambient air for cooling E6 Warning Operating Temperature This product is designed for a max...

Страница 36: ...environment compatible with the manufacturer s maximum rated ambient temperature Tmra E35 Caution Installation of the equipment in a rack should be such that the amount of air flow required for safe operation of the equipment is not compromised E36 Warning Reliable earthing of rack mounted equipment should be maintained Particular attention should be given to supply connections other than direct c...

Страница 37: ...er from its shipping container and store the packaging material in a safe location Warning An SFP transceiver can be damaged by static electricity Be sure to observe all standard electrostatic discharge ESD precautions such as wearing an antistatic wrist strap to avoid damaging the transceiver 2 Remove the dust plug from the SFP slot as shown in Figure 9 Figure 9 Removing the Dust Plug from the SF...

Страница 38: ... installed or when you store the SFP always keep the plug in the optical bores When you do remove the plug keep it for future use Note Unnecessary removal and insertion of an SFP can lead to premature failure For information about cabling for the SFP consult the documentation that was shipped with the SFP 45R 47R 46R 48R 45 46 47 48 CLASS 1 LASER P RODU CT AT GS950 48 48 Port 10 100 1000 Mbps WebS...

Страница 39: ...into place The ports on the switch are auto MDI MDI X You can use either a straight through or crossover twisted pair cable to connect any type of network device to a port on the switch The network should not contain data loops which can adversely affect network performance A data loop exists when two or more network devices can communicate with each other over more than one data path 2 Connect th...

Страница 40: ...wing procedure 1 Plug the power cord into the AC power connector on the back of the switch as shown in Figure 14 Figure 14 Plugging in the AC Power Cord 45R 47R 46R 48R 45 46 47 48 CLASS 1 LASER P RODU CT AT GS950 48 48 Port 10 100 1000 Mbps WebSmart Switch with 4 Combo SFP Ports LINK 1000M ACT 100M 10M PORT ACTIVITY SFP 1085 45R 47R 46R 48R 45 46 47 48 CLASS 1 LASER P RODU CT AT GS950 48 48 Port ...

Страница 41: ...nt session on the switch refer to Starting a Management Session on page 42 To start a remote management session the switch must have an IP address For information about giving the switch an IP address and starting a remote management session refer to the AT S87 Management Software User s Guide Warning Power cord is used as a disconnection device To de energize equipment disconnect the power cord E...

Страница 42: ...r address box enter the following IP address 192 168 1 1 The main page for the AT S87 management software main page is shown in Figure 15 Figure 15 AT S87 Management Software Main Page 2 Click OK Because the switch initially has no login or password protection follow the instructions in the AT S87 Management Software User s Guide to change the IP address and add administrative users ...

Страница 43: ...ry connecting the unit to another power source Try using a different power cord Verify that the voltage from the power source is within the required levels for your region Verify that the LINK ACT LED for each port is ON If a LINK ACT LED is OFF do the following Verify that the end node connected to the port is powered on and is operating properly Verify that the twisted pair cable is securely con...

Страница 44: ...Chapter 3 Troubleshooting 44 ...

Страница 45: ...ge Temperature 25 C to 70 C 13 F to 158 F Operating Humidity 5 to 90 non condensing Storage Humidity 5 to 95 non condensing Operating Altitude Range Up to 3 000 m 9 843 ft Power Specifications Input Supply Voltage 100 240 VAC 50 60 Hz Power Consumption 90 Watts Safety and Electromagnetic Emissions Certifications EMI RFI FCC Class A EN55022 Class A CISPR Class A Immunity EN55024 Electrical Safety E...

Страница 46: ...Appendix A Technical Specifications 46 ...

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