Related by context. All words. (Click for frequent words.) 63 Calix C7 63 GPON OLT 62 Zhone MALC 62 D Link AirPremier 62 Wi Fi #.#a/b/g 62 Zarlink CESoP 61 IPv4 IPv6 61 IPSec tunnel 61 TI TNETV# 61 IPmux 61 SMC#L# 61 Pseudowire 61 Gigabit Ethernet uplinks 61 Gigabit Switch 61 EoS 61 OADM 60 XRN 60 VLX# 60 SIGTRAN 60 #.#af compliant 60 #/#/# Ethernet 60 PCIe Gen2 60 #/#Base-T 60 PT SEGway 60 IP SAS SATA 60 CSU DSU 60 Tatara Convergence Server 60 MEF certified 60 VoIP softswitch 60 PoE Switch 60 IP MPLS router 60 DWDM dense wavelength 60 Hitachi EPON 60 GPON optical 60 GPON EPON 60 PortaSwitch 60 RangeMax Wireless Router 60 GGSN 60 PWE3 60 Packet Optical Platform 60 IPv#/IPv# 59 GPRS EDGE UMTS 59 Session Initiated Protocol SIP 59 ADSL2Plus 59 Allot NetEnforcer 59 NexTone SBC 59 XPort# 59 Signaling Gateway 59 SIP Session Initiated Protocol 59 SONET EoS 59 Aepona Causeway 59 iDigi Platform 59 Spirent Landslide 59 TDMoIP 59 TDM ATM 59 IMS SIP 59 SEGway 59 SFP modules 59 packet forwarding 59 NetSpira ECS 59 IPnexus 59 CBA# 59 #GbE switch 59 CWDM DWDM 59 #.#b wireless LAN 58 SNMPv3 58 VoIP Gateways 58 Empirix Hammer XMS 58 UMA GAN 58 Enea LINX 58 Juniper T# 58 Ciena #G 58 Tekelec EAGLE 58 G.# codec 58 Sigtran 58 pseudowire 58 NGN IMS 58 FastIron SuperX 58 port #/#/# 58 #/#BASE-T 58 Megaco 58 SS7 ISDN 58 IntelliConnect System 58 IDT PCI Express 58 SM# AH 58 LAN Ethernet 58 Siemens SURPASS 58 PBB TE 58 RocketLinx ES# 58 iDirect Evolution platform 58 Gigabit uplink 58 IWLAN 58 MobileVoIP 58 #Gbit s Ethernet [002] 58 Rapid Spanning Tree 58 packet switched 58 Infinera DTN 58 LoopStar 58 interchangeable modules 58 Copper Cabling System 58 DWDM optical 58 MAGNM 58 Octasic Vocallo MGW 58 MSPPs 58 #x#G [001] 58 NexTone IntelliConnect System 58 wirespeed 58 EtherNID TM 58 EdgeView VoIP Support 58 DS1s 58 PsipTN 58 sRIO 58 CN# [002] 58 Gigabit Ethernet GigE 58 Hi FOCuS 57 #/#/#BASE-T 57 QoS mechanisms 57 microTCA 57 ONUs 57 OfficeConnect 57 Modbus RTU 57 SS#/C# 57 Ethernet aggregation 57 Multi Gigabit 57 Ciena ActivFlex 57 TDM Ethernet 57 MTP# 57 SDH SONET 57 4Gbit s Fibre Channel 57 T#/E# circuits 57 AEL# 57 BroadLight BL# 57 ROADM functionality 57 4G Fibre Channel 57 TrueNet 57 #.#AE 57 4X InfiniBand 57 Lucent IMS 57 #/#/# Mbps Ethernet 57 AccuROAM 57 Jungo OpenRG 57 Connection Oriented 57 Force# C# 57 AFDX 57 M7i 57 pluggable optics 57 Encryptors 57 Spirent TestCenter 57 CoreStream Agility 57 Sonet SDH 57 C4 CMTS 57 OC# [003] 57 DOCSIS ® 57 Packet Optical 57 PBB PBB TE 57 E StaX 57 LANShield Switch 57 GPON Gigabit 57 Coarse Wavelength Division Multiplexing 57 NetHawk EAST 57 ConnectPort WAN 57 port #G Ethernet 57 Device Servers 57 SparX II 57 Accedian 57 gigabit Ethernet switches 57 Softswitches 57 #G OTN [001] 57 Horizon Compact 57 IPTube 57 Ethernet WAN 57 zNID 57 drop multiplexer 57 OC-#/STM-# [001] 57 #Base X 57 Redback SmartEdge 57 ISDN BRI 57 TECORE 57 SIP VoIP 57 Agito Networks RoamAnywhere Mobility 57 #G transponders 57 Fujitsu XG# 57 Core Router 57 VPN passthrough 57 Femtocell Gateway 57 MGCP 57 Ethernet TCP IP 57 NAT router 57 SIP H# 57 Adaptive Optical Engine 57 IP DSLAMs 57 SAFARI C3 57 CESoP 57 NexusLink 57 Diva Server 57 SFP ports 57 EdgeMarc 57 Gigabit WAN 57 GENBAND G9 57 PSTN gateway 57 NEBS certified 56 wireless mesh nodes 56 UDP TCP 56 protocol interworking 56 Edge QAM 56 mesh topology 56 SPH#D 56 FPDP 56 #Gbps Ethernet [001] 56 RSTP 56 NAT Traversal 56 IEEE #.#ad 56 NetEnforcer 56 Flexi NG 56 multichassis 56 Quintum Tenor 56 femtocell gateway 56 Alcatel Evolium 56 Gb s optical 56 #/#G [002] 56 OC-#/STM-# [003] 56 hosted NAT traversal 56 EN #G 56 Asterisk PBX 56 VLAN tagging 56 ISAM FTTU 56 drop multiplexer ROADM 56 #Gigabit 56 MVTS Pro 56 echo canceller 56 Ethernet-over-SONET/SDH 56 ExpEther 56 OC-#/STM-# [002] 56 3GPP compliant 56 ITU G.# GPON 56 Iub 56 WAN PHY 56 Covergence Session Manager 56 seamless interworking 56 Bonded ADSL2 + 56 Glimmerglass optical 56 SS7 signaling 56 Gigabit Ethernet Switch 56 Layer 2/Layer 3 56 Wintegra WinPath 56 HiGig 56 Ethernet demarcation 56 EtherNID ™ 56 gigabit LAN 56 Gigabit Ethernet WAN 56 Synchronous Digital Hierarchy 56 8Gbit s FC 56 Pseudo Wire 56 OSI Layer 56 Serial RapidIO ® 56 mesh backhaul 56 Juniper Networks T# 56 SmartEdge platform 56 AirPrime MC# 56 TCI# 56 BigBand Cuda 56 Aggregation Platform 56 #.#X authentication 56 AdvancedTCA blades 56 loopbacks 56 VPN router 56 Ixia IxNetwork 56 SIP Server 56 Cavium OCTEON 56 SIP SS7 56 Multidimensional Ethernet 56 Sonus IMS 56 CEVA VoP 56 Signalware 56 TN# [002] 56 Covergence Eclipse 56 SIParator 56 OCT# Series 56 #.#b g WLAN 56 Synchronous Ethernet 56 gigabit serial 56 FibeAir IP 56 DCOSS 56 Broadband Router 56 LAN WLAN 56 Modem Router 56 Support Node SGSN 56 SAS expanders 56 FlexTCA 56 G6 Universal 56 ATCA blade 56 Moovera 56 MetroNID 56 AudioCodes Mediant 56 3G Femtocell 56 UART interface 56 IP MPLS backbone 56 Signaling Analyzer 56 SERCOS III 56 Motorola SoftSwitch 56 LTE EPC 56 T#/E#/J# 56 EdgePoint PRO 56 Stratix II FPGA 56 Ingate Firewall 56 Cisco CRS 1 56 Generic Framing Procedure GFP 56 Mindspeed M# 56 Phybridge UniPhyer 56 multi homed 56 PacketCable compliant 56 GE PON 56 x1 PCIe 56 PowerTerm ® 56 NFP #xx 56 #G/#G/#G 56 SRIO 56 Circuit Emulation 56 USB Dongle 56 Vx# [002] 56 IP Multiprotocol Label 56 IEEE #.#x [002] 56 #G Optical [001] 56 Service Delivery Platform 56 #/#BaseT 56 MEGACO 56 StarFabric 55 AirMaestro 55 IP DSLAM 55 please visit www.EXFO.com 55 T#/E# WAN 55 XMC PMC 55 uplink ports 55 Transport Layer 55 #Gbit/sec Ethernet 55 InfinIO 55 Ethernet Demarcation 55 JenNet 55 ASON 55 IPsec VPN 55 MACsec 55 MetaSwitch softswitch 55 DES #P 55 ExaScale switch 55 Brekeke PBX 55 iMAP 55 Gigabit Ethernet transceivers 55 #G QSFP 55 trunking gateway 55 Echo Cancellation 55 PCIe Gen 2 55 IP Multicast 55 Gigabit Ethernet Passive Optical 55 MODBUS 55 BroadWorks platform 55 #Gbps optical [001] 55 Aricent ISS 55 TCP IP Offload Engine 55 IPNET 55 VoiceXML browser 55 eFMC 55 SDIO interface 55 Midspan 55 IntelliNAC 55 SafeNet QuickSec 55 inverse multiplexing 55 Fusiv 55 IAX2 55 iAN 55 Brocade VCS 55 MetaSphere 55 #Base T [002] 55 WiMAX Forum NWG 55 IGMP snooping 55 EdgeMarc Network Services 55 IronPoint 55 GPON Optical Line 55 #/#/#Base-T 55 DynaMate 55 SIP endpoints 55 Mediant TM 55 ECI XDM 55 CobraNet 55 #G coherent [001] 55 ASN Gateway 55 WAN routers 55 Ethernet Extenders 55 pluggable modules 55 Gigabit Ethernet Switches 55 Tekelec EAGLE 5 55 Dual Gigabit Ethernet 55 EoC 55 HomePlug powerline 55 Ixia IxYukon 55 Passive Optical Networks 55 RS# serial 55 Cat5 cable 55 RS# interfaces 55 Trillium Femtocell 55 metro DWDM 55 NetWay 55 DiSEqC 55 TNETV# 55 Load Balancer 55 Spatial Atrium 55 IxYukon 55 #GE [002] 55 8G Fibre Channel 55 ActivFlex 55 Multiservice Access Platform 55 Telit module 55 ConnectX EN 55 Gigabit Ethernet #GE 55 xPON 55 NetIron XMR Series 55 Stateful 55 Veraz ControlSwitch 55 multirate 55 CoreDirector 55 Force# switches 55 NetIron 55 interwork 55 NAT firewall 55 Aicent MMS 55 Roaming Client 55 Ethernet OAM 55 HyperPipe 55 MODBUS RTU 55 MC#i 55 midspans 55 IMS architectures 55 pseudowires 55 GbE switching 55 Virtual LAN VLAN 55 TCP UDP 55 Trapeze Mobility System 55 fieldbuses 55 Etherjack 55 SIP protocol 55 Reconfigurable Optical Add 55 SCIM 55 DIAMETER 55 Advanced Routing 55 Gigabit Ethernet SFP + 55 Cisco Unified CallManager 55 FXO FXS 55 Packet Transport 55 iWDM 55 muxponder 55 VPN gateway 55 BigIron RX Series 55 NetCracker OSS 55 Nobill 55 #Base SX 55 #v# [004] 55 Cyan Z Series 55 MIMO antenna technology 55 Vocallo MGW 55 WPA2 PSK 55 MetroScope 55 HN# Series 55 Virtual Concatenation VCAT 55 Data Serving Node 55 SIP Session Initiation Protocol 55 Multimode Fiber 55 MSP# [002] 55 iPECS ES 55 EtherMap PDH 55 XAUI interface 55 Wavelength Division Multiplexing 55 Generalized Multi Protocol Label 55 Packet Processing 55 #Gbit Ethernet 55 Nortel Common Photonic 55 Virtual Chassis 55 iSPAN 55 Xgig 55 OMA compliant 55 1G EPON 55 Multipoint 55 reconfigurability 55 PowerQUICC III processor 55 Packet Processor 55 User Datagram Protocol 55 ReFLEX 55 ADSL Modem 55 SIP Trunk 55 ADSL/ADSL2 + 55 Dynamic PSK 55 Broadvox GO 55 OLTs 55 Gigabit connectivity 55 Fibre Channel FICON 54 APP# [002] 54 MasterClaw 54 SoftSwitch 54 Multiprotocol 54 #G/#G [003] 54 ADSL2 + VDSL2 54 ADVA FSP 54 Ulticom Signalware 54 Packet Core 54 Alcatel OmniAccess 54 Infinera DTN optical 54 VRRP 54 IP MPLS routing 54 RFS# 54 baseband RF 54 SkyExtender 54 Multiservice Access 54 PortaSwitch Procinctus 54 Cellular Backhaul 54 Prosody X 54 Analog Telephone 54 mux demux 54 BigIron MG8 54 Essentra BAX 54 T#/E# 54 ZigBee modules 54 ROADM Reconfigurable Optical 54 Modbus TCP IP 54 Vmux 54 DirectAccess server 54 #-Gbit/sec 54 vPort 54 Wavelength Division Multiplexing WDM 54 bonded ADSL2 + 54 IMS NGN 54 NEBS compliant 54 Serial RapidIO 54 iMAT 54 QUICC Engine 54 Hitachi AMN# 54 ProSLIC 54 ISUP 54 IMS TISPAN 54 Wavelength Tracker 54 softswitching 54 CSR BlueCore5 Multimedia 54 Liquid Bandwidth 54 #Gbit/sec 54 QuickSec 54 SMC#M 54 DVB-S2/ACM 54 Cat 6a 54 Gigabit Switches 54 SMS Router 54 wi4 WiMAX 54 Gigabit throughput 54 Comtrend NexusLink 54 Cellular Router 54 IEEE #v# 54 Rapid IO 54 Brocade Fibre Channel 54 VQmon SA 54 Performance Technologies SEGway 54 EAP TLS 54 XFP modules 54 Serdes 54 Sangoma NetBorder Express 54 VPN firewall 54 Optical Switch 54 #GigE [001] 54 Nevis LANenforcer 54 Anagran FR 54 FibeAir IP MAX2 54 CESD portfolio 54 Teknovus EPON 54 AMCC QT# 54 IPoDWDM 54 Flexi NS 54 3DES encryption 54 Nortel Optical Multiservice 54 MediaTone 54 #.#ah 54 PacketCable TM qualified 54 EtherSphere 54 wideband codecs 54 SwitchBlade x# 54 CORWave II 54 IP3 NetAccess 54 Coax Ethernet Adapter Kit 54 Sat3Play 54 CANbus 54 CleverConnect 54 Carrius 54 ADSL modem router 54 ECI Hi FOCuS 54 WinPath 54 SFN#F 54 Ethernet LAN 54 ControlSwitch 54 #GE ports 54 RapID Platform 54 stateful packet inspection 54 ETX #A 54 SafeXcel IP 54 Interworking 54 ZebOS 54 Bandwidth Virtualization 54 VoIPerfect 54 #G iMAP integrated 54 Strata CIX 54 Engineering PBB TE 54 Resilient Packet Ring RPR 54 Voltaire Grid Backbone 54 Pseudowires 54 Access Devices EADs 54 Etherjack ® 54 Basestation 54 Lockdown Enforcer 54 Motorola wi4 54 FibeAir #T 54 TCP acceleration 54 BroadSoft BroadWorks VoIP 54 ViewXpand 54 HyPHY 54 OTU4 54 VPN Router 54 POTS interfaces 54 Switch Routers 54 aggregation switches 54 MERA VoIP Transit 54 Alvarion WiMAX 54 Enterasys Matrix 54 SPA# [001] 54 IP RAN 54 Voltaire InfiniBand 54 FlexSelect Architecture 54 Embedded Module 54 MACSec 54 NET SatisFAXtion 54 ActivEdge 54 XML Firewall 54 Routing Switch 54 Provider Backbone Transport 54 L2 L7 54 Netgear ProSafe 54 Gbps optical 54 IEEE#.#b 54 PoE ports 54 multihop 54 SIPware 54 MMTel 54 TLS SSL 54 GBX# 54 Wave Division Multiplexing 54 Unified MBX 54 Muxponder 54 Gbit Ethernet 54 FlexiPacket Microwave 54 Cisco IP NGN 54 AnyConnect 54 mSwitch 54 BeaconWorks 54 SessionSuite 54 Protocol VRRP 54 MetroMesh 54 AdaptPath 54 #gbps 54 TCP socket 54 router firewall 54 Cable Modem 54 Beamforming 53 SIP IMS 53 Gbps wavelength 53 ExtremeXOS ® operating 53 Anywave 53 DS0 53 LLDP MED 53 Ethernet Fabric 53 DWDM backbone 53 Wireless Modem Router 53 Ethernet Fibre Channel 53 FHSS 53 BroadAccess 53 RADIUS servers 53 EdgeMarc VoIP VPN 53 Mobixell Seamless Access 53 Atheros #.#n 53 Access Device IAD 53 Juniper SSL VPN 53 SystemWeaver 53 iWARP RDMA 53 3G multimode 53 LLDP 53 NXCPUs 53 Ethernet MPLS 53 #.#ae 53 ETHERNET Powerlink 53 ARM7 processor 53 GSLB 53 Ethernet interfaces 53 Packet Blazer 53 VIAaq 53 CIRPACK 53 Gb Ethernet 53 IP multicast 53 Layer #/#/# 53 QUALCOMM BREW TM 53 Synchronous Optical Network 53 sub channelization 53 ASN GW 53 MIMO antennas 53 Profibus DeviceNet 53 GPON ONT 53 #/#/#BASE-T Gigabit Ethernet 53 #G Ethernet switch 53 linecards 53 J#A 53 baseband chipsets 53 B2BUA 53 Alcatel OmniSwitch 53 GateD 53 Ethernet LANs 53 Vitesse FlexEQ 53 TDM circuits 53 Surpass hiT 53 RJ# ports 53 Assurance Solution 53 Wireless Cable Modem 53 Customer Premises Equipment CPE 53 Multiservice Edge 53 Seamless Access 53 MetaSwitch VP# 53 E#/T# 53 Serial Interface 53 #.#ad 53 Netstender 53 RGMII 53 SIParators 53 #/#/# Ethernet ports 53 IEEE #.#X 53 3Com OfficeConnect 53 Transceivers 53 Corrigent CM 53 IPSec encryption 53 SONET rings 53 aXs GUARD Gatekeeper 53 Redline RedMAX 53 Hi FOCuS TM 53 Evolution PBX 53 density #GbE 53 FlexWave 53 #.#n Router 53 SONET SDH OTN 53 #Gb iSCSI 53 SRTP 53 synchronous Ethernet 53 DVB ASI 53 DWDM wavelengths 53 Edge OME 53 Ikanos Fusiv 53 Hosted IP PBX 53 #Gigabit Ethernet 53 sFlow 53 Blackfin Processors 53 IPSEC 53 RocketIO 53 SSL VPN appliances 53 differential amplifiers 53 SoftMSC 53 ComMAX CM# 53 TippingPoint X# 53 Orthogonal Frequency Division Multiplexing 53 Dense Wave Division Multiplexing 53 SIP MGCP 53 Link Aggregation 53 Juniper JUNOS 53 unicast multicast 53 G.SHDSL 53 VoBB 53 Service Provisioning Platform 53 #/#/# LAN 53 Serving GPRS 53 coarse wavelength division multiplexing 53 iPBX 53 FastIron GS Series 53 Accedian Networks TM 53 T1 E1 53 SIP Session 53 QAM channels 53 Axerra 53 OFDM orthogonal frequency 53 EtherTone 53 WiMAX SoC 53 #GbE uplinks 53 nSignia 53 #.#.#/ZigBee 53 PinPoint XT 53 drop multiplexers ROADMs 53 VQuad 53 #X# MIMO 53 user datagram protocol 53 NAT traversal 53 LambdaUnite 53 MPLS VPNs 53 MF TDMA 53 ConnectPort WAN VPN 53 Toshiba Strata 53 Industry Smallest 53 Procera PacketLogic 53 iFCP 53 MOTOwi4 53 FortiGate appliance 53 RealTunnel 53 gigabit ports 53 IP backhaul 53 BeamFlex 53 SDH PDH 53 Gigabit Ethernet connectivity 53 Broadcom DOCSIS 53 Ethernet Switch 53 Protocol Stack 53 BXR # 53 serial RapidIO 53 Qosmos ixEngine 53 #Base T [003] 53 IMS VCC 53 Digi Connect WAN 53 E#/T# ports 53 #.#b g wireless LAN 53 Shift Keying 53 ISAKMP 53 1G #.#G 53 Single RAN 53 Wireless Modems 53 Modulation ACM 53 Edge Gx 53 Alcatel Lucent OmniSwitch 53 Router 53 SONET OC 53 VidyoRouter 53 SonicWALL Aventail SSL VPN 53 GSM GPRS cellular 53 CATx 53 GbE switches 53 #:# LVDS 53 Gigabit uplinks 53 SOHO router 53 Signaling Gateways 53 Nextone 53 Monics 53 VolP 53 #.#aq 53 Real Dialup Win 53 CSMA CD 53 CMTSs 53 M CMTS 53 NetHawk M5 53 3Com NBX 53 #.#.# ZigBee 53 Application Layer 53 routing topology 53 TNZI 53 AVANTA 53 #G #G [002] 53 AWL# 53 LightSoft 53 LAN PHY 53 HTTP HTTPS 53 multicast routing 53 H VPLS 53 H.# SIP 53 ExaScale 53 Freescale MSC# 53 Kyocera KR1 Mobile 53 ZoneGate 53 stateful inspection firewall 53 EXA Powered 53 XLR Processor 53 FTB #B 53 Marvell Prestera 53 symmetrical bandwidth 53 Seven.Five 53 Tmedia 53 Proximetry AirSync 53 PDH SONET SDH 53 #Gb Fibre Channel 53 IEEE #.#b g 53 Dialogic ® 53 EZ Connect 53 VoiceEngine 53 #G transponder 53 BigIron RX 53 IP Routing 53 Voice Messaging 53 Mindspeed ® 53 Penthera Viewer 53 XO SIP 53 ARM TrustZone 53 MPLS TE 53 Gigabit PON GPON 53 DAN# 53 DMG# 53 Internet Protocol Multiprotocol 53 VoDSL 53 OmniPCX Enterprise 53 multimode fibers 53 #G wavelengths [002] 53 #GPP/#GPP# 53 RFX# 53 SunSet MTT 53 optical DWDM 53 Dimetra IP Compact 53 #/#-bit WEP encryption 53 EX# switches 53 Adaptive Modulation 53 Conferencing Solution 53 Taqua MobileWorks 53 Aspect Uniphi Suite 53 virtual LANs 53 Optical Multiservice Edge 53 #GbE connectivity 53 Packet Optical Edge 53 BlackDiamond # 53 Infranet 52 WNR#T 52 Ethernet SONET 52 FabricPath 52 AdaptRate 52 ManageLinx 52 #GbE NIC 52 #.#x authentication 52 #Base T [001] 52 Brocade DCX 4S Backbone 52 OPC UA 52 Digi TransPort 52 Nortel #G [001] 52 #Gb s [001] 52 LTE Femtocell 52 Wireless Intrusion Prevention 52 stateful firewall 52 Internet SCSI iSCSI 52 Session Initiation Protocol 52 M3UA 52 reconfigurable optical 52 BroadWorks 52 MSC Servers 52 SIP trunk 52 iNAV 52 GDM# 52 TPSDA 52 Ethernet Gigabit Ethernet 52 SPI#.# 52 Mobility Router 52 Junos SDK 52 GTX transceivers 52 Computing Architecture ATCA 52 Ingate SIParator 52 Interface Module 52 Broadband Telephony 52 QAM quadrature amplitude modulation 52 BelAir Networks patented 52 3G DigRF 52 NetIron XMR 52 synchronous asynchronous 52 connectionless 52 PRoC LP 52 uMobility 52 Deep Packet Inspection DPI 52 FlexPort 52 serializer deserializer SERDES 52 WAN failover 52 GIPS VoiceEngine Multimedia 52 TLS encryption 52 DP QPSK 52 VocalTec Essentra 52 MPLS Multiprotocol Label Switching 52 IPSec SSL 52 Motorola MOTOMESH 52 Juniper MX# 52 Modbus TCP 52 MXV# 52 #G GPON 52 ZigBee protocol 52 Navtel 52 PDH SDH 52 MX ONE 52 PacketCable TM 52 SIP signaling 52 NextHop GateD 52 IPv#/v# 52 M2M Module 52 SmartVoice 52 GbE interfaces 52 BigBand BMR 52 ARM9 core 52 MPC# processor 52 Tx Rx 52 UMTS/3G 52 deploying uniquely architected 52 Dual Homing 52 SIPassure 52 CEVA DSP core 52 XFP optics 52 U4EA Fusion 52 3Com VCX 52 AN #i