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Network Equipment Type:

PoE Ready?

IP Telephony?

Area Network Type:

Form Factor:

Protocols / Networks:

Wireless?

Ports / Interfaces:

Number of Ports:

Processor / CPU Type:

Processor Speed:

Memory:

RAM:

Flash Memory:

Data Rate:

Operating Temperature:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Users:

Concurrent Connections:

MAC Addresses:

RoHS?

Stackable?

Rack Mount?

LED Indicator?

Integrated Firewall?

IP Addressing?

Alarm?

Full Duplex?

VPN?

Hardened Product?

Help with Network Equipment specifications:

Network Equipment Type
           
   Your choices are...         
   Hub       Network hubs provide a central location for attaching wires to workstations. They can be passive or active. Passive hubs do not amplify signals. Active hubs are used like repeaters to extend the cable that connects to a workstation. 
   Switch       Network switches connect network devices to host computers. They allow a large number of devices to share a limited number of ports. Network switches are used both in computer networks and in telecommunications networks. Ethernet LAN switches use variable-sized packets or frames. ATM switches use small, fixed-sized cells for telecom applications. 
   Router       Network routers are protocol-dependent devices that connect sub-networks. Although they can separate a very large network into smaller sub-networks, routers introduce longer delays and typically have much lower throughput rates than network bridges. Routers operate at the Layer 3 network layer. 
   Repeater       Network repeaters are 802.3 network cable segments. Regeneration and retiming ensure that the signal is transmitted clearly through all segments. 
   Bridge       Network bridges interconnect local or remote networks. They centralize network administration by forming a single logical network. Bridges operate at the physical and link layers of the open systems interconnection (OSI) reference model. 
   Gateway       Network gateways are devices that can interconnect networks with different, incompatible communications protocols. They perform a Layer-7 protocol-conversion to translate one set of protocols into another (for example, from TCP/IP to SNA or from TCP/IP to X.25). Gateways operate at OSI layers up through the session layer. 
   Multiplexer       Network multiplexers are telecommunications devices that funnel multiple signals onto a single channel. 
   Transceiver       Network transceivers (transmitters-receivers) are devices that both transmit and receive analog or digital signals. 
   Firewall       Network firewalls are a system or group of systems that, for purposes of security, enforce an access control policy between an organization's network and the Internet. 
   Other       Other unlisted, specialized, or proprietary network equipment types. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   PoE Ready       The device supports Power over Ethernet (PoE) signals. Both data and power are delivered in one cable to a powered device (PD). 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   IP Telephony       IP telephony allows voice phone calls to be made over the Internet or other packet networks using a personal computer (PC), via gateways and standard telephones. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Area Network Type       
   Your choices are...         
   LAN Capable       Devices are able to transmit over short distances for local area networks (LAN), the most common network type. 
   MAN Capable       Devices are able to transmit over long distances for metropolitan area networks (MAN). 
   WAN Capable       Devices are able to transmit over long distances for wide area networks (WAN). 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Form Factor
           
   Your choices are...         
   Chip       The network equipment is a chip. 
   Board       The network equipment is a board or card. 
   Module       The network equipment is stand-alone and enclosed. 
   Other       Other unlisted, specialized, or proprietary form factors. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Network Protocols / Technology Network protocols are the fundamental mechanisms for network communications. They specify the software attributes of data communications, including the structure of a packet and the information contained therein. Protocols may also prescribe some or all of the operational characteristics of the hardware on which they run. Examples of network protocols include IPX, TCP/IP and AppleTalk®.
   Protocols / Networks       
   Your choices are...         
   AppleTalk®       AppleTalk® is a networking protocol for connecting Macintosh® computers to each other, or to shared devices. AppleTalk was designed to run over LocalTalk® networks, but can also run on Ethernet and Token Ring.  AppleTalk, Macintosh, and LocalTalk are registered trademarks of Apple Computer, Inc. 
   ATM       Asynchronous transfer mode (ATM) is a high-speed, point-to-point, switched network technology that uses fiber optic or Category 5 (Cat-5) copper cabling. ATM transmits data in cells rather than frames and can carry text, audio, and video. Each cell is a packet that contains 5 bytes of routing information and 48 bytes of data. Basic networks run at 155 Mbps, but implementations that use fiber optic cable can achieve speeds as high as 660 Mbps. The basic desktop standard runs at 25 Mbps. 
   CANbus       Controller area network bus (CANbus) is a high-speed serial data network designed for harsh electrical environments and real-time control applications. It operates at data rates up to 1 Mbps and provides excellent error detection and confinement capabilities. 
   ControlNet       Control network (ControlNet) allows multiple controllers to control I/O on the same link. It is well-suited for peer-to-peer systems and offers deterministic, repeatable performance for both discrete and process applications. 
   DeviceNet       DeviceNet uses controller area network (CAN) protocol to connect industrial devices such as limit switches, photoelectric cells, valve manifolds, motor starters, drives, and operator displays to programmable logic controllers (PLCs) and personal computers (PCs). 
   Ethernet       Ethernet is a local area network (LAN) protocol that uses a bus or star typology and supports data transfer rates of 10 Mbps. The Ethernet specification is the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. To handle simultaneous demands, Ethernet uses carrier sense multiple access / collision detection (CSMA/CD) to monitor network traffic. 
   10Base-T Ethernet       10Base-T Ethernet or twisted-pair Ethernet is an adaptation of the IEEE 802.3 standard for local area networks (LAN). 10Base-T uses twisted-pair cables with a maximum length of 100 m and is thinner and more flexible than the coaxial cable used with the 10Base-2 or 10Base-5 standards. 10Base-T cables connect with RJ-45 connectors. The 10Base-T system operates at 10 Mbps and uses baseband-type transmission. 
   10Base-2 Ethernet       10Base-2 Ethernet or thinnet is an adaptation of the IEEE 802.3 standard for local area networks (LAN). 10Base-2 uses 50-ohm coaxial cables (RG-58 A/U) with a maximum length of 185 m. 10Base-2 cable is thinner and more flexible than the cable used with the 10Base-5 standard. Cables in the 10Base-2 systems connect with BNC connectors. 10Base-2 systems operate at 10 Mbps and use baseband-type transmission. 
   10/100 Ethernet       10/100 Ethernet can have speeds of both 10 Mbps and 100 Mbps on the same port. 
   Fast Ethernet       Fast Ethernet or 100Base-T is the 100-Mbps Ethernet specification from IEEE 802.3. There are five alternatives used with different transmission media. The group called 100Base-X alternatives use two physical links - one for transmission, one for reception - between nodes. The 100Base-T group uses the medium access control (MAC) protocol. 
   Gigabit Ethernet       Gigabit Ethernet is a high-speed Ethernet standard from the IEEE 802.3z Gigabit Task Force. 
   Fibre Channel       Fibre channel is a high-speed, serial data transfer architecture that uses links of twisted-pair, coaxial, or fiber optic cable. Small computer system interface (SCSI) devices can use fibre channel arbitrated loop (FC-AL), the most popular fibre channel typology. Using optical fiber, FC-AL supports full-duplex data transfer rates of 100 Mbps. Eventually, FC-AL is expected to replace SCSI in high-performance storage systems. 
   FDDI       Fiber distributed data interface (FDDI) is a reliable, high-speed backbone for mission critical and high traffic networks. It transports data at 100 Mbps and can support up to 500 stations on a single network. FDDI was designed to use fiber cables, transmitting light pulses to convey information between stations; however, it can also run on copper wire with electrical signals. 
   Fieldbus       Fieldbus is a bi-directional communications protocol used for communications among field instrumentation and control systems. 
   Frame Relay       Frame relay is a packet-switching wide area network (WAN) technology for interconnecting LANs at high speeds. Frame relay defines the interface between user equipment and a WAN; however, it does not define the internal operation of the network, or the interfaces or protocols used within the WAN itself. For this reason, the term "frame relay clouding" is often used to describe the internal operation of a LAN that has a frame relay interface. 
   INTERBUS®       INTERBUS® is a fieldbus network based on the cyclic, serial transmission of input/output data between a master and slave stations. Common versions include INTERBUS-S®, INTERBUS-R®, and INTERBUS-MUX® (MUX). INTERBUS, INTERBUS-S and INTERBUS-MUX are registered trademarks of Phoenix Contact GmbH & Co. 
   ISDN       Integrated services digital network (ISDN) is an international communications standard for sending voice, video, and data over digital telephone lines or traditional telephone lines. ISDN uses a packet-switching technology and supports data transfer rates of 64 Kbps. There are two basic types of ISDN: basic rate interface (BRI) and primary rate interface (PRI). 
   PROFIBUS®       The process fieldbus (PROFIBUS®) is a popular, open communication standard used in factory automation, process automation, motion control, and safety applications. PROFIBUS is standardized in IEC 71158 and IEC 61784 and is suitable for both fast, time-critical applications and complex communication tasks. PROFIBUS is a registered trademark of PROFIBUS International. 
   SONET       Synchronous optical network (SONET) is a high-speed, synchronous network designed to run on fiber at digital transmission rates from 51.84 Mbps to beyond 2.4 Gbps. SONET is a family of fiber optic transmission rates and optical interface standards that enables users to connect products from different vendors. SONET defines a physical-interface optical line rate known as optical carrier (OC). It also defines the frame format and an operating, administration, maintenance, and provisioning (OAM&P) protocol. 
   Token Ring       Token ring is a network transport typology in which attached devices must receive a supervisory frame or token before they can transmit data. Token ring networks are wired in a circular or star-shaped configuration and provide transmission speeds of 4 or 16 Mbps. They are less common than Ethernet networks, but are suitable for many high-speed, high-traffic applications. Token ring networks adhere to the IEEE 802.5 standard and medium access protocol (MAC) protocol. 
   xDSL       xDSL is a point-to-point, public network access technology. It allows multiple forms of data, voice, and video to be carried over twisted-pair copper wire on the local loop between a network service provider's central office and the customer's site. 
   ARCNET       Attached resource computer network (ARCNET) is an embedded, high-speed, token-based network technology that provides local area network (LAN) communications between computers. ARCNET relies on a bus or star topology and can support up to 255 nodes. Different versions run at speeds of 1.5 Mbps, 20 Mbps (ARCNET Plus), and 100 Mbps. 
   H.323       H.323 is a voice-over IP (VoIP) network protocol that was created originally to provide a mechanism for transporting multimedia applications over LANs. Although H.323 is still used by numerous vendors for videoconferencing applications, it has evolved rapidly to address the growing needs of VoIP networks. Because of its early availability and subsequent advancements, H.323 is now the most widely used VoIP signaling and call-control protocol. International and domestic carriers rely on H.323 to handle billions of minutes of use each year. 
   MGCP       Media gateway control protocol (MGCP) is a VoIP protocol.  
   MEGACO H.248       MEGACO H.248 is a VoIP gateway control protocol. 
   RVP Over IP       Remote voice protocol over IP (RVP) is a VoIP protocol. 
   SAPv2       Session announcement protocol (SAPv2) is a VoIP protocol. 
   SGCP       Simple gateway control protocol (SGCP) is a VoIP protocol. 
   SIP       Session initiation protocol (SIP) is a VoIP protocol. 
   Skinny       Skinny client control protocol (SCCP) is a proprietary VoIP protocol. 
   Infiniband®       InfiniBand® (IB) is a channel-based, point-to-point architecture that creates a centralized I/O fabric allowing for greater server performance, design density, reliability and performance scalability. InfiniBand is a registered trademark of the InfiniBand Trade Association. 
   Other       Other unlisted, specialized, or proprietary protocols. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Wireless       Network devices are used in wireless systems. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Ports / Interfaces
           
   Your choices are...         
   AUI       AUI is the IEEE 802.3 standard name for the cable connecting an Ethernet transceiver (MAU) to a networked device. AUI cables are equipped with a 15-pin connector which mates with a 15-pin connector on the networked device. 
   BNC       Bayonet Neil-Concelman (BNC) connectors were designed for military applications, but are used widely in video and RF applications to 2 GHz. BNC connectors have a slotted outer conductor and a plastic dielectric that causes increasing losses at higher frequencies. BNC connectors are usable above 4 GHz as long as the slots radiate signals; however, these devices may not be mechanically stable to 10 GHz. Both 50Ω and 75Ω BNC connectors are available. BNC connectors are also known as bayonet navy connectors or baby Neil connectors. 
   FireWire® (IEEE 1394)       FireWire® is a cross-platform implementation of the high-speed serial data bus, defined by IEEE 1394, that can move large amounts of data between computers and peripheral devices. It features simplified cabling, hot swapping, and transfer speeds of up to 400 Mbps. FireWire speeds the movement of multimedia data and large files. It also enables the direct connection of digital consumer products such as digital camcorders, digital videotapes, digital videodisks, set-top boxes, and music systems to personal computers (PC). FireWire is a registered trademark of Apple Computer, Inc. 
   GBIC       Gigabit interface converter (GBIC) is a physical component that manages the functions of the FC-0 layer, which determines the physical characteristic of the media and interface, including drivers, transceivers, connectors, and cables. 
   MIC       Medium interface connectors (MIC) are duplex, fiber optic connectors used with fiber distributed data interface (FDDI) networks. 
   RJ-45       Registered Jack 45 (RJ-45) connectors resemble standard telephone connectors, but are twice as wide with eight wires. RJ-45s can be used to connect computers to LANs and with phones with many lines. 
   SC       Subscription channel (SC) connectors are fiber optic connectors with a 2.5 mm ferrule and push-pull latching mechanism. They can be snapped together to form duplex and multi-fiber connectors. The TIA / EIA 568-A standard recommends SC connectors for structured cabling. SC connectors are also used with Ethernet 100Base-FX and 1000Base-LX/SX fiber optic media systems. 
   Serial       Serial port or asynchronous serial interfaces are system-to-system communication interfaces in which data is sent over a single wire (serial). Serial communications include RS232, RS422, and RS485, etc. 
   ST       Straight tip (ST) connectors use a physically-contacting, non-rotating 2.5-mm ferrule design and bayonet connector-to-adapter mating. They are used with FDDI cabling applications and 10Base-FL and fiber optic inter-repeater (FIOR) links. 
   ISDN BRI S/T       The ISDN BRI S/T interface is used with ISDN networks.  
   ISDN BRI U       ISDN devices must have a terminator (NT1 terminator) between the ISDN device and the wall jack. The U interface connects NT1-terminated ISDN devices to the telephone company's ISDN wall jack. Many ISDN devices have a U interface for direction connection to the wall jack. 
   USB       Universal serial bus (USB) is a 4-wire, 12-Mbps serial bus for low-to-medium speed peripheral device connections to personal computers (PC), including keyboards, mice, modems, printers, joysticks, audio functions, monitor controls, etc. The USB design is standardized by the USB Implementers Forum (USBIF), an organization that includes leading companies from the computer and electronics industries. The current USB specification is USB 2.0, which supports data transfer rates of up to 480 Mbps. 
   T1       T1 is a dedicated phone connection which supports data rates of 1.544 Mbps. T1 lines have 24 channels, each of which supports 64 Kbps and can be configured to carry voice or data. Many common carriers allow customers to buy individual channels as fractional T1 (FT1).  
   Fractional T1 (FT1)       Fractional T1 (FT1) uses some, but not all of the 24 channels in a T1 line.  
   E1       E1 is the European version of a T1 line. It has 32 channels and carries data at 2 Mbps. 
   Fractional E1 (FE1)       Fractional E1 (FE1) is an E1 line that uses some, but not all of the channels in a full E1 line. 
   T3       T3 is a dedicated phone connection which supports rates of 44 Mbps. A T3 line has 672 channels, each of which supports 64 kbps. 
   E3       E3 is the European version of a T2 line. E3 is a long-distance, point-to-point communications circuit service that operates at 44 Mbps and can carry 672 channels of 64 kbps. 
   Other       Other unlisted, specialized, or proprietary port types. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Number of Ports       The total number of ports which the network equipment provides. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Processor Specifications
   Processor / CPU Type       
   Your choices are...         
   Intel® Pentium® II       The Intel® Pentium®­ II processor has an internal register size of 32 bits, a data I/O bus width of 64 bits, a memory address bus width of 36 bits, and a maximum memory of 64 GB. Intel and Pentium are registered trademarks of Intel Corp. 
   Intel® Pentium® III       The Intel® Pentium® III processor has an internal register size of 32 bits, a data I/O bus width of 64 bits, a memory address bus width of 36 bits, and a maximum memory of 64 GB. It uses Intel's 0.18-micron manufacturing process and has a high clock speed of over 10 GHz. Intel and Pentium are registered trademarks of Intel Corp.  
   Intel® Pentium® 4       The Intel® Pentium® 4 processor is based on Intel's NetBurst® micro-architecture and provides speeds of over 2 GHz. Intel, Pentium, and NetBurst are registered trademarks of Intel Corp. 
   Intel® Pentium® III Xeon®       The Intel® Pentium® III Xeon® processor is designed for mid-range to high-end servers and workstations. Intel, Pentium, and Xeon are registered trademarks of Intel Corp. 
   Intel® Itanium®       The Intel® Itanium® processor has an internal register size of 64 bits, a data I/O bus width of 64 bits, a memory address bus width of 44 bits, and a maximum memory of 64 GB. 
   Intel® Celeron®       The Intel® Celeron® processor has an internal register size of 32 bits, a data I/O bus width of 64 bits, and a maximum memory of 64 GB. 
   AMD® Athlon®       The AMD® Athlon® processor features x86 architecture, an on-chip full-speed cache of 384 KB, a system bus speed of 200 MHz, a process bus speed of 200 MHz, and three floating point pipelines. AMD and Athlon are registered trademarks of Advanced Micro Devices, Inc. 
   AMD® Duron®       The AMD® Duron® processor has an x86 architecture, a seventh-generation processor, an on-chip full-speed cache of 192 KB (Level L1 + Level L2), three floating point pipelines, and a system bus speed of 200 MHz. AMD and Duron are registered trademarks of Advanced Micro Devices, Inc. 
   AMD-K6®       AMD-K6® features x86 compatibility, multi-media extensions (MMX) technology, on-chip full-speed cache of 2368 KB, a system bus speed of 200 MHz, three floating point pipelines, and 3DNow!® technology. Members of this product family include AMD K6-III and AMD K6-2. AMD-K6 and 3DNow! are registered trademarks of Advanced Micro Devices, Inc. 
   AMD® Geode® GX1       The AMD® Geode® GX1 family of products features low power consumption, speeds up to 300 MHz, a peripheral component interconnect (PCI) host controller, and support for the Intel® MMX instruction set for fast multimedia applications. AMD and Geode are registered trademarks of Advanced Micro Devices, Inc. Intel is a registered trademark of Intel Corp. 
   Motorola® PowerPC®       The Motorola® PowerPC® is a reduced instruction set computer (RISC) microprocessor that meets the standard set by the PowerPC Alliance (Motorola, IBM®, and Apple Computer). The PowerPC standard specifies a 32-bit and 64-bit bus and support for 32 floating point registers. The PowerPC processor is used to power notebooks, desktop computers, workstations, servers, and high-end telecommunication networks. Motorola is a registered trademark of Motorola. IBM and PowerPC are registered trademarks of International Business Machines Corp. 
   UltraSPARC® Family (UltraSPARC®-II)       The UltraSPARC® family of products includes full 64-bit implementation for SPARC® V9 architecture, built-in multiprocessor (MP) support (glueless 4-way and up to 64-way), performance scalability with a frequency range of  250 - 480 MHz and L2 cache support of 256KB - 16MB, as well as multiple static random access memory (SRAM) modes with variable-speed L2 cache. SPARC, UltraSPARC, and UltraSPARC-II are registered trademarks of SPARC International and licensed to Sun Microsystems, Inc. 
   Other       Other unlisted, specialized, or proprietary processors or central processing unit (CPU) types. 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Processor Speed       The rated speed at which the processor functions while carrying out system tasks. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
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Memory
   Memory       The total memory of the network equipment. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   RAM       Random access memory (RAM) is the main memory of the computer. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Flash Memory       Flash memory is electrically erasable, programmable, read-only memory (EEPROM) that can be erased and reprogrammed in blocks instead of one byte at a time. Because it is non-volatile, Flash memory does not need a constant power supply to retain data. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
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Performance
   Data Rate       The maximum data transfer speed. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Operating Temperature       The operating temperature range of the network equipment. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
   Users       The number of users for which network equipment is designed. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Concurrent Connections       The number of concurrent connections that devices can support.  This is also known as concurrent sessions or concurrent users. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   MAC Addresses       The total number of media access control (MAC) addresses the network equipment can store. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
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Features
   RoHS       Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl, and polybrominated diphenyl ether. RoHS will become effective on July 1, 2006. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Stackable       The network equipment is stackable. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Rack Mount       The network equipment can be mounted in a rack. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   LED Indicator       The network equipment has a LED indicator light. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Integrated Firewall       The network equipment has an integrated firewall for security. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   IP Addressing       The network equipment has IP addressing for smarter routing. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Alarm       The network equipment has an alarm. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Full Duplex       Full duplex refers to the ability of a device or line to transmit data simultaneously in both directions. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   VPN       A virtual private network (VPN) is a connection that has the appearance and many of the advantages of a dedicated link, but occurs over a shared network. Using a technique called tunneling, data packets are transmitted across a public, routed network in a private "tunnel" that simulates a point-to-point connection and allows network protocols to traverse incompatible infrastructures. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Hardened Product       Hardened products are designed to withstand extreme conditions. Their casings provide protection from weather-related conditions and can act as a heat sink, directing high temperatures away from sensitive components. Hardened products use more reliable components than commercial products and are often used in telecommunications applications.  
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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