Page 2 - Trademarks Used in this Manual
724-746-5500 | blackbox.com Page 2 724-746-5500 | blackbox.com Trademarks Used in this Manual Black Box and the Double Diamond logo are registered trademarks of BB Technologies, Inc. Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
Page 5 - VCCI C
C OMPLIANCES AND S AFETY S TATEMENTS FCC - C LASS A This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is ope...
Page 6 - CE M; ARK; EMI; AND; standards were applied:
C OMPLIAN CES AND S AFETY S TATE M EN TS CE M ARK D ECLARATION OF C ONFORMANCE FOR EMI AND S AFETY (EEC) This information technology equipment complies with the requirements of the Council Directive 89/336/EEC on the Approximation of the laws of the Member States relating to Electromagnetic Compatib...
Page 7 - AFETY; Warnhinweis: Faseroptikanschlüsse - Optische Sicherheit; PSE A; LARM
C OMPLIAN CES AND S AFETY S T ATEM EN TS S AFETY C OMPLIANCE Warning: Fiber Optic Port Safety CLASS I LASER DEVICE When using a fiber optic port, never look at the transmit laser while it is powered on. Also, never look directly at the fiber TX port and fiber cable ends when they are powered on. Ave...
Page 8 - OWER; international safety standards.; Before making connections, make sure you have the correct cord
C OMPLIAN CES AND S AFETY S TATE M EN TS P OWER C ORD S AFETY Please read the following safety information carefully before installing the switch: WARNING: Installation and removal of the unit must be carried out by qualified personnel only. The unit must be connected to an earthed (grounded) outlet...
Page 9 - L’installation et la dépose de ce groupe doivent être confiés à
C OMPLIAN CES AND S AFETY S T ATEM EN TS Power Cord Set U.S.A. and Canada The cord set must be UL-approved and CSA certified. The minimum specifications for the flexible cord are: - No. 18 AWG - not longer than 2 meters, or 16 AWG. - Type SV or SJ - 3-conductor The cord set must have a rated current...
Page 11 - Stromkabel
C OMPLIAN CES AND S AFETY S T ATEM EN TS Bitte unbedingt vor dem Einbauen des Switches die folgenden Sicherheitsanweisungen durchlesen: WARNUNG: Die Installation und der Ausbau des Geräts darf nur durch Fachpersonal erfolgen. Das Gerät sollte nicht an eine ungeerdete Wechselstromsteckdose angeschlos...
Page 15 - URPOSE; ELATED
A BOUT T HIS G UIDE P URPOSE This guide details the hardware features of the switch, including the physical and performance-related characteristics, and how to install the switch. A UDIENCE The guide is intended for use by network administrators who are responsible for installing and setting up netw...
Page 16 - EVISION; This is the first revision of this guide.
A BOUT T HIS G U IDE R EVISION H ISTORY This section summarizes the changes in each revision of this guide. M AY 2010 R EVISION This is the first revision of this guide. – 16 –
Page 17 - ONTENTS
C ONTENTS C OMPLIANCES AND S AFETY S TATEMENTS 5 A BOUT T HIS G UIDE 15 C ONTENTS 17 T ABLES 19 F IGURES 21 1 I NTRODUCTION 23 Overview 23 Description of Hardware 25 Features and Benefits 30 2 N ETWORK P LANNING 33 Introduction to Switching 33 Application Examples 34 Application Notes 39 3 I NSTALLI...
Page 19 - ABLES
T ABLES Table 1: Port Status LEDs 26 Table 2: System Status LEDs 27 Table 3: Supported SFP+ Transceivers 29 Table 4: Module LEDs 29 Table 5: Serial Cable Wiring 52 Table 6: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths 63 Table 7: Maximum 10GBASE-LR 10 Gigabit Ethernet Cable Length 63 Table 8: ...
Page 21 - IGURES
F IGURES Figure 1: Front Panels 24 Figure 2: Rear Panel 24 Figure 3: Port LEDs 26 Figure 4: System LEDs 27 Figure 5: Power Supply Sockets 28 Figure 6: Single-Port 10GBASE Module (SFP+) 29 Figure 7: Collapsed Backbone 34 Figure 8: Network Aggregation Plan 35 Figure 9: Remote Connections with Fiber Ca...
Page 23 - NTRODUCTION; VERVIEW; that are shared with four SFP transceiver slots (see
1 I NTRODUCTION O VERVIEW The LG B6026A and LGB6050A Switches are intelligent multilayer switches (Layer 2, 3) with 24/48 10/100/1000BASE-T ports, four of which are combination ports 1 that are shared with four SFP transceiver slots (see Figure 1 , Ports 21- 24/45-48). The rear panel provides two sl...
Page 24 - HAPTER; WITCH
C HAPTER 1 | Introduction Overview Figure 1: Front Panels LGB6050A Port Status LEDs Stack ID Serial Console Port LGB6026A 10/100/1000 Mbps RJ-45 Ports System Status LEDs SFP Slots 1 2 3 4 5 6 7 8 9 1 0 11 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 1 2 2 2 3 2 4 S ta c k ID M as te r S el ...
Page 25 - ESCRIPTION OF; “1000BASE-T Pin Assignments” on page 74; SFP T
C HAPTER 1 | Introduction Description of Hardware N ETWORK M AN AG EMENT O PTIONS These switches contain a comprehensive array of LEDs for “at-a-glance” monitoring of network and port status. They also include a management agent that allows you to configure or monitor the switch using its embedded m...
Page 26 - “Optional Media Extender; LED
C HAPTER 1 | Introduction Description of Hardware 10 G IGABIT E THERNET M ODULE S L OTS These switches include two slots on the rear panel for hot-swappable single-port 10GBASE modules with SFP+ transceivers. Refer to “Optional Media Extender Modules” on page 29 for more information on this module a...
Page 29 - PTIONAL; ODULE; XTENDER
C HAPTER 1 | I ntroduction Description of Hard w are O PTIONAL M EDIA E XTENDER M ODULES 10GBASE SFP+ M ODULE Figure 6: Single-Port 10GBASE Module (SFP+) The module’s SFP+ slot supports standard 10 Gigabit Ethernet (10G) SFP+ transceivers. The 10GBASE transceivers operate at 10 Gbps full duplex with...
Page 30 - EATURES AND; ONNE CTIV ITY; for protection of your investment in legacy LAN equipment.; XP AN D ABILITY; Optional 10GBASE single-port expansion module with an SFP+; ERFORM ANCE; Transparent bridging.
C HAPTER 1 | Introduction Features and Benefits F EATURES AND B ENEFITS C ONNE CTIV ITY 24 or 48 10/100/1000 Mbps ports for easy Gigabit Ethernet integration and for protection of your investment in legacy LAN equipment. Auto-negotiation enables each RJ-45 port to automa tica lly select the optimum ...
Page 31 - AN AG E ME NT
C HAPTER 1 | Introduction Features and Benefits Switching table with a total of 16K MAC address entries and 8K IPv4 address entries or 4K IPv6 address entries Provides store-and-forward switching for intra-VLAN traffic, and IP routing for inter-VLAN traffic. Supports wire-speed switching at layer 2,...
Page 33 - NTRODUCTION TO
2 N ETWORK P LANNING I NTRODUCTION TO S WITCHING A network switch allows simultaneous transmission of multiple packets via non- crossbar switching. This means that it can partition a network more efficiently than bridges or routers. These switches have, therefore, been recognized as one of the most ...
Page 34 - PPLICATION; OLLAPSED
C HAPTER 2 | Network Planning Application Examples A PPLICATION E XAMPLES The Gigabit Ethernet Switches are not only designed to segment your network, but also to provide a wide range of options in setting up network connections and linking VLANs or IP sub nets. Some typical applications are describ...
Page 35 - ETWORK
C HAPTER 2 | Network Planning Application Examples N ETWORK A GGREGATION P L AN With 24 or 48 parallel bridging ports (i.e., 24 or 48 distinct collision domains), a Gigabit switch stack can collapse a complex network down into a single efficient bridged node, increasing overall bandwidth and through...
Page 36 - EMOTE
C HAPTER 2 | Network Planning Application Examples R EMOTE C ONNECTIONS WITH F IBER C ABLE Fiber optic technology allows for longer cabling than any other media type. A 1000BASE-SX (MMF) link can connect to a site up to 550 meters away, a 1000BASE-LX (SMF) link up to 5 km, and a 1000BASE-LH link up ...
Page 37 - AKING; VLAN C; ONN ECTIONS; When connecting to a switch that does not support IEEE
C HAPTER 2 | Network Planning Application Examples M AKING VLAN C ONN ECTIONS These switches support VLANs which can be used to organize any group of network nodes into separate broadcast domains. VLANs confine broadcast traffic to the originating group, and can eliminate broadcast storms in large n...
Page 38 - SING
C HAPTER 2 | Network Planning Application Examples U SING L AYER 3 R OUTING VLANs can significantly enhance network performance and security. However, if you use conventional routers to interconnect VLANs, you can lose most of your performance advantage. These Gigabit Ethernet Switches are routing s...
Page 41 - ELECTING A; be at the center of all the devices you want to link and near a power
3 I NSTALLING THE S WITCH S ELECTING A S ITE Switch units can be mounted in a standard 19-inch equipment rack or on a flat surface. Be sure to follow the guidelines below when choosing a location. The site should: be at the center of all the devices you want to link and near a power outlet. be able ...
Page 42 - THERNET; Protection from radio frequency interference emissions
C HAPTER 3 | Installing the Switch Ethernet Cabling E THERNET C ABLING To ensure proper operation when installing the switches into a network, make sure that the current cables are suitable for 10BASE-T, 100BASE-TX or 1000BASE-T operation. Check the following criteria against the current installatio...
Page 43 - QUIPMENT
C HAPTER 3 | Installing the Switch Equipment Checklist E QUIPMENT C HECKLIST After unpacking this switch, check the contents to be sure you have received all the components. Then, before beginning the installation, be sure you have all other necessary installation equipment. P ACKAG E C ONTE NTS 24-...
Page 44 - OUNTING; ACK; Grounding: Rack-mounted equipment should be properly grounded.
C HAPTER 3 | Installing the Switch Mounting M OUNTING The switch can be mounted in a standard 19-inch equipment rack or on a desktop or shelf. Mounting instructions for each type of site follow. R ACK M OUNT ING Before rack mounting the switch, pay particular attention to the following factors: Temp...
Page 45 - Mount the device in the rack, using four rack-mounting screws (not
C HAPTER 3 | Installing the Switch Mounti ng Figure 13: Attaching the Brackets 2. Mount the device in the rack, using four rack-mounting screws (not provided). Figure 14: Installing the Switch in a Rack – 45 –
Page 46 - “Connecting to a Power Source”; ESKTOP OR; “Connecting to a Power Source” on
C HAPTER 3 | Installing the Switch Mounting 3. If installing a single switch only, turn to “Connecting to a Power Source” on page 51 . 4. If installing multiple switches, mount them in the rack, one below the other, in any order. 5. If also installing an RPS, mount it in the rack below the other dev...
Page 47 - NSTALLING AN; power off the switch before installing or removing a module.
C HAPTER 3 | Installing the Switch Installing an Optional Module into the Switch I NSTALLING AN O PTI ONAL M ODULE INTO THE S WITCH Figure 16: Installing an Optional Module N OTE : The slide-in modules are hot-swappable, you do not need to power off the switch before installing or removing a module....
Page 48 - RANSCEIVER; Slide the SFP transceiver into the slot until it clicks into place.; SFP transceivers are hot-swappable. The switch does not need; SFP transceivers are not provided in the switch package.
C HAPTER 3 | Installing the Switch Installing an Optional SFP Transceiver I NSTALLING AN O PTI ONAL SFP T RANSCEIVER Figure 17: Inserting an SFP Transceiver into a Slot These switches support 1000BASE-SX and 1000BASE-LX, and 1000BASE-LH SFP-compatible transceivers. To install an SFP transceiver, do ...
Page 49 - ONNECTING; shows how the stack cables are connected between switches in a
C HAPTER 3 | Installing the Switch Connecting Switches in a Stack C ONNECTING S WITCHES IN A S TACK Figure 18 shows how the stack cables are connected between switches in a stack. Each stacking connection is a 48 Gbps full-duplex high-speed serial link using proprietary stacking cables (part numbers...
Page 50 - T ACKING; Table 2, “System Status LEDs,” on page 27
C HAPTER 3 | Installing the Switch Connecting Switches in a Stack Figure 18: Making Stacking Connections 5. Select the Master unit in the stack by pressing the Master button in on only one of the switches. Only one switch in the stack can operate as the Master, all other units operate in slave mode....
Page 51 - ONNECTING TO A; To connect a switch to a power source:; For International use, you may need to change the AC line
C HAPTER 3 | Installing the Switch Connecting to a Power Source should manually replace the failed link or unit as soon as possible. If you are using a wrap-around stack topology, a single point of failure in the stack will not cause the stack to fail. It would take two or more points of failure to ...
Page 52 - ONNECTING TO THE; IRING; The serial port’s configuration requirements are as follows:
C HAPTER 3 | Installing the Switch Connecting to the Console Port 4. If you have purchased a Redundant Power Supply, connect it to the switch and to an AC power source now, following the instructions included with the package. C ONNECTING TO THE C ONSOLE P ORT The RJ-45 serial port on the switch’s f...
Page 53 - Character Size—8 Characters
C HAPTER 3 | Installing the Switch Connecting to the Console Port Character Size—8 Characters Parity—None Stop bit—One Data bits—8 Flow control—none – 53 –
Page 55 - ABLING; See Appendix B for further information on cabling.; AUT ION; Do not plug a phone jack connector into an RJ-45 port. This
4 M AKING N ETWORK C ONNECTIONS C ONNECTING N ETWORK D EVICES This switch is designed to interconnect multiple segments (or collision domains). It can be connected to network cards in PCs and servers, as well as to hubs, switches or routers. It may also be connected to devices using optional SFP+ or...
Page 56 - ONNECTING TO; PC; ER VERS; Attach one end of a twisted-pair cable segment to the device’s RJ-45; “Network Wiring; Avoid using flow control on a port connected to a hub unless it
C HAPTER 4 | Making Network Connections Twisted-Pair Devices C ONNECTING TO PC S , S ER VERS , H UBS AND S WITCH ES 1. Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector. Figure 21: Making Twisted-Pair Connections 2. If the device is a network card and the switch is in th...
Page 57 - other end to the patch panel.
C HAPTER 4 | Making Network Connectio ns Twisted-Pair Devices N ETWORK W IRING C ONNE CTIONS Today, the punch-down block is an integral part of many of the newer equipment racks. It is actually part of the patch panel. Instructions for making connections in the wiring closet with this type of equipm...
Page 58 - IBER; SFP D; EVICES
w i t 10 /1 0 6 7 2 4 L C HAPTER 4 | Making Network Connections Fiber Optic SFP Devices Figure 22: Network Wiring Connections Equipment Rac k (side view ) Network Switc h Punch-Down Block Patch Panel W all F IBER O PTIC SFP D EVICES An optional Gigabit SFP transceiver (1000BASE-SX, 1000BASE-LX or 10...
Page 59 - This switch uses lasers to transmit signals over fiber optic; AR NING; When selecting a fiber SFP device, considering safety,; the port to be sure that the connection is valid.
C HAPTER 4 | Making Network Connectio ns Fiber Optic SFP Devices W AR NING : This switch uses lasers to transmit signals over fiber optic cable. The lasers are compliant with the requirements of a Class 1 Laser Product and are inherently eye safe in normal operation. However, you should never look d...
Page 60 - “1000 Mbps Gigabit Ethernet Collision Domain” on page 64
C HAPTER 4 | Making Network Connections Fiber Optic SFP Devices The 1000BASE-SX, 1000BASE-LX, 1000BASE-LH fiber optic ports operate at 1 Gbps, full duplex, with auto-negotiation of flow control. The maximum length for fiber optic cable operating at Gigabit speed will depend on the fiber type as list...
Page 61 - BPS; These switches use lasers to transmit signals over fiber; When selecting a fiber device, considering safety, please
C HAPTER 4 | Making Network Connections 10 Gbps Fiber Optic Connections 10 G BPS F IBER O PTIC C ONNECTIONS An optional 10 Gigabit transceiver (SFP+) can be used for a backbone connection between switches. Single-mode fiber ports require 9/125 micron single-mode fiber optic cable. Multimode fiber op...
Page 62 - the connection is valid.
C HAPTER 4 | Making Network Connections 10 Gbps Fiber Optic Connections Figure 24: Connecting to an SFP+ Transceiver 4. As a connection is made, check the Link LED on the module to be sure that the connection is valid. The 10G fiber optic ports operate at 10 Gbps full duplex. The maximum length for ...
Page 63 - ONNECTIVITY
C HAPTER 4 | Making Network Connectio ns Connectivity Rules C ONNECTIVITY R ULES When adding hubs (repeaters) to your network, please follow the connectivity rules listed in the manuals for these products. However, note that because switches break up the path for connected devices into separate coll...
Page 65 - ABLE; Clearly label the opposing ends of each cable.
C HAPTER 4 | Making Network Connections Cable Labeling and Connection Records 100 M BPS F AST E THERNET C OLLISION D OM AIN Table 13: Maximum Fast Ethernet Cable Lengths Type Cable Type Max. Cable Length Connector 100BASE-TX Category 5 or better 100-ohm UTP or STP 100 m (328 ft) RJ-45 10 M BPS E THE...
Page 66 - Differentiate between racks by naming accordingly.
C HAPTER 4 | Making Network Connections Cable Labeling and Connection Records Differentiate between racks by naming accordingly. Label each separate piece of equipment. Display a copy of your equipment map, including keys to all abbreviations at each equipment rack. – 66 –
Page 67 - ROUBLESHOOTING; IAGNOSING
A T ROUBLESHOOTING D IAGNOSING S WITCH I NDICATORS Table 15: Troubleshooting Chart Symptom Action PWR LED is Off Check connections between the switch, the power cord and the wall outlet. Contact your dealer for assistance. Power LED is Amber Internal power supply has failed. Contact your local deale...
Page 69 - The management agent accepts up to four simultaneous Telnet
C HAPTER A | Troubleshooting Power and Cooling Problems P OWER AND C OOLING P ROBLEMS If the power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply. However, if the unit powers off after running for a whi...
Page 70 - TACK; Check that all stacking cables are properly connected.
C HAPTER A | Troubleshooting Stack Troubleshooting S TACK T ROUBLESHOOTING If a stack fails to initialize or function, first check the following items: Check that all stacking cables are properly connected. Check if any stacking cables appear damaged. Check that only one Stack Master button is press...
Page 71 - WISTED; DO NOT plug a phone jack connector into any RJ-45 port.; Each wire pair must be attached to the RJ-45 connectors in
B C ABLES T WISTED -P AI R C ABLE AND P IN A SSIGNMENTS For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of wires. For 1000BASE-T connections the twisted-pair cable must have four pairs of wires. Each wire pair is identified by two different colors. For example, one wire mig...
Page 72 - IN; TRAIGHT
C HAPTER B | Cables Twisted-Pair Cable and Pin Assignments 10BASE-T/100BASE-T X P IN A SS IG N MEN TS Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100-ohm Category 3 or better cable for 10 Mbps connections, or 100-ohm Category 5 or better cable for 10...
Page 73 - ROSSOVER
C HAPTER B | Cables Twisted-Pair Cable and Pin Assignments Figure 26: Straight-through Wiring EIA/TIA 568B RJ-45 Wiring Standard 10/100BASE-TX Straight-through Cable W hite/Orang e Stri p e 1 End A 2 3 4 5 6 7 8 Oran ge W hite/Green Stripe Blue W hite /B lu e Stri p e Gre e n W hite/Brow n Stri p e ...
Page 77 - PECIFICATIONS; HYSICAL; OR TS; depend on the fiber type as listed under; UFFER
C S PECIFICATIONS P HYSICAL C HARACTERISTICS P OR TS LG B6026A : 20 10/100/1000BASE-T, with auto-negotiation 4 10/100/1000BASE-T shared with 4 SFP transceiver slots 2 10GBASE extender module slots for SFP+ transceivers Two slots for stacking transceivers LGB6050A:44 10/100/1000BASE-T, with auto-nego...
Page 79 - Wire speed
C HAPTER C | Specifications Switch Features P OWER S UPPLY Internal, auto-ranging transformer: 100 to 240 VAC, 47 to 63 Hz External, supports connection for redundant power supply P OWER C ONSUMPTION LGB6026A: 66 Watts (without expansion modules) 80 Watts (with two expansion modules [LGB6001C]) LGB6...
Page 80 - ANAGEMENT; Ethernet, Fast Ethernet, Gigabit Ethernet
C HAPTER C | Specifications Management Features M ANAGEMENT F EATURES I N -B AND M ANAG EMENT SSH, Telnet, SNMP, or HTTP O UT - OF -B AND M ANAGEMENT RS-232 DB-9 console port S OFTWARE L OADING TFTP in-band, or XModem out-of-band S TANDARDS IEEE 802.3-2005 Ethernet, Fast Ethernet, Gigabit Ethernet F...
Page 81 - OMPLIANCES; slot for 10GBASE SFP+ transceiver
C HAPTER C | Specifications Compliances C OMPLIANCES CE M ARK E MISSIONS FCC Class A Industry Canada Class A EN55022 (CISPR 22) Class A EN 61000-3-2/3 VCCI Class A C-Tick - AS/NZS 3548 (1995) Class A I MMUNITY EN 61000-4-2/3/4/5/6/8/11 S AFETY UL 60950-1 & CSA 60950-1 IEC 60950-1 & EN 60950-...
Page 83 - LOSSARY
G LOSSARY 10BASE-T IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5 UTP cable. 100BASE-TX IEEE 802.3u specification for 100 Mbps Ethernet over two pairs of Category 5 UTP cable. 1000BASE-LH Specification for long-haul Gigabit Ethernet over two strands of 9/125 micr...
Page 84 - A 10 Gbps network communication system based on Ethernet.
G LOSS AR Y 10GBASE-LR IEEE 802.3ae specification for 10 Gigabit Ethernet over two strands of 9/125 micron core single-mode fiber cable. 10GBASE-SR IEEE 802.3ae specification for 10 Gigabit Ethernet over two strands of 62.5/125 micron core multimode fiber cable. 10 G IGABIT E THERNET A 10 Gbps netwo...
Page 85 - IEEE; Institute of Electrical and Electronic Engineers.
G LOSS AR Y E THERNET A network communication system developed and standardized by DEC, Intel, and Xerox, using baseband transmission, CSMA/CD access, logical bus topology, and coaxial cable. The successor IEEE 802.3 standard provides for integration into the OSI model and extends the physical layer...
Page 86 - LAN S; Separate LAN or collision domain.; A group of interconnected computer and support devices.; MIB
G LOSS AR Y IEEE 802.3 U Defines CSMA/CD access method and physical layer specifications for 100BASE- TX Fast Ethernet. (Now incorporated in IEEE 802.3-2005.) IEEE 802.3 Z Defines CSMA/CD access method and physical layer specifications for 1000BASE Gigabit Ethernet. (Now incorporated in IEEE 802.3-2...
Page 87 - Ports that are on separate collision domains or LAN segments.; TIA; Telecommunications Industry Association; UTP
G LOSS AR Y N ETWORK D IAMETER Wire distance between two end stations in the same collision domain. R EDUNDANT P OWER S UPPLY (RPS) A backup power supply unit that automatically takes over in case the primary power supply should fail. RJ-45 C ONNECTOR A connector for twisted-pair wiring. S WITCHED P...
Page 89 - NDEX; UMERICS
I NDEX N UMERICS 10 Gbps connectivity rules 63 10 Mbps connectivity rules 65 100 Mbps connectivity rules 65 1000 Mbps connectivity rules 64 1000BASE-LH fiber cable Lengths 64 1000BASE-LX fiber cable Lengths 64 1000BASE-SX fiber cable Lengths 63 , 64 1000BASE-T pin assignments 74 100BASE-TX, cable le...
Page 91 - About Black Box; BLACK BOX; Tech support the
724-746-5500 | blackbox.com About Black Box Black Box provides an extensive range of networking and infrastructure products. You’ll find everything from cabinets and racks and power and surge protection products to media converters and Ethernet switches all supported by free, live 24/7 Tech support ...
