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(Click for frequent words.) 85 Gigabit Ethernet 79 Ethernet 77 GigE 76 gigabit ethernet 76 GbE 76 #GbE [001] 76 Gigabit Ethernet ports 75 #G Ethernet [001] 75 Gigabit 74 Gbit Ethernet 74 ethernet 73 Gigabit Ethernet GbE 72 #/#/# Ethernet 72 #GigE [001] 72 #Gb Ethernet [001] 72 Ethernet connectivity 72 Ethernet interfaces 72 #G Ethernet ports 72 Gbps 71 #Gigabit Ethernet 71 #GE [001] 71 #/#Mbps Ethernet 71 1GbE 71 Gigabit Ethernet GigE 70 4Gb Fibre Channel 70 Fast Ethernet 70 Gb Ethernet 70 #Gbps [001] 70 Ethernet ports 70 uplink ports 70 Gigabit Ethernet #GbE [001] 70 Fiber Channel 69 #Gbps Ethernet [001] 69 2Gbps 69 #.#g wireless 69 Gb s 69 Gbit s Ethernet 69 Gbps Ethernet 69 SFP ports 69 #Gig [001] 69 #Gbit s [001] 69 Ethernet LAN 69 Gigabit Ethernet uplinks 69 Fibre Channel 69 4Gbit/sec 69 4Gbit s Fibre Channel 69 Gigabit Ethernet connectivity 69 Gb sec 68 #/#/#Base-T 68 4Gbit s 68 serial interfaces 68 PCI Express PCIe 68 Gigabit Ethernet interfaces 68 Gbit s 68 Fibre Channel Gigabit Ethernet 68 PCI X 68 Ethernet aggregation 68 gigabit Ethernet port 68 GbE interfaces 68 T#/E# 68 #/#/# Gigabit Ethernet 68 4Gbps 68 Gbit sec 68 1G Ethernet 68 Ethernet switches 68 PCIe 68 GbE ports 68 3Gb s 68 #/#M 67 4Gbps Fibre Channel 67 Gbps Fibre Channel 67 gigabit Ethernet ports 67 Gigabit ports 67 #Gb s [001] 67 #Gbit Ethernet 67 PCI Express x8 67 #Gbit/sec 67 port #G Ethernet 67 #.#Gbps [001] 67 #.#b g wireless 67 gigabit ports 67 Gigabit LAN 67 GPON OLT 67 AdvancedMC 67 3Gbps SATA 67 SFP + 67 stackable switches 67 wired Ethernet 67 4Gb s 67 PCI Express 67 2Gbit s 67 SATA II 66 #.#a/b/g wireless 66 Gigabit Ethernet adapters 66 GbE switch 66 #Gigabit 66 #GE ports 66 8Gbps 66 #/#/# Ethernet ports 66 #GE [002] 66 GigE ports 66 Fibre Channel connectivity 66 Ultra# SCSI 66 Gig Ethernet 66 Gigabit Fibre Channel 66 8Gbps Fibre Channel 66 InfiniBand switch 66 Gigabit ethernet 66 #GbE switch 66 #/#/# ports 66 #GbE ports 66 #Base FX 66 #.#n wireless 66 SRIO 66 PCIe Gen2 66 gigabit 66 6Gb s 66 Ethernet adapters 66 USB#.# 66 gigabit LAN 66 InfiniBand 66 Fibre Channel ports 66 backplane 66 8Gb s 66 PCIe interface 66 GbE connectivity 65 eSATA 65 Serial RapidIO 65 ethernet ports 65 PHYs 65 #GBASE T 65 #GBASE CX4 65 6Gbps SAS 65 serial ATA SATA 65 Mbps Ethernet 65 3Gbps 65 SCSI Fibre Channel 65 6Gbps 65 dual Gigabit Ethernet 65 FC HBAs 65 #Gbit s Ethernet [002] 65 dual gigabit Ethernet 65 Infiniband 65 ConnectX EN 65 #/#/# Mbps Ethernet 65 SATA RAID 65 port #/#/# 65 Gigabit Ethernet switches 65 #gbps 65 SAS expanders 65 #.#Gbps [004] 65 #GbE connectivity 65 #/#/# Mbps 65 QDR InfiniBand 65 NetIron XMR Series 65 XENPAK 65 #.#a/b/g 65 Gigabit Ethernet #GE 65 SGMII 65 Gb s Fibre Channel 65 PCI Express Gigabit Ethernet 65 #Gb s InfiniBand 65 #Gbps Ethernet [002] 65 Gigabit Ethernet Fibre Channel 65 SATA 65 SFP modules 65 Gbps optical 64 #Mbps Ethernet 64 fiber optic transceivers 64 FibreChannel 64 #Base T [001] 64 2Gb s 64 T#/E#/J# 64 Gbit 64 router 64 SDH SONET 64 XAUI 64 SFP transceivers 64 NetIron XMR 64 wirespeed 64 Gbits sec 64 GbE iSCSI 64 SATA 6Gbps 64 multi gigabit 64 #GBase CX4 64 SAS SATA 64 PoE ports 64 optical transceivers 64 #GbE iSCSI 64 #GbE interfaces 64 UARTs 64 sRIO 64 #/#/#Mbps 64 x8 PCI Express 64 x8 PCIe 64 #Mbps [003] 64 SFP + modules 64 Gigabit Ethernet uplink 64 PCIe Gen 2 64 serial RapidIO 64 SFP + ports 64 Gbps interfaces 64 CAT5e 64 1GigE 64 Gigabit switches 64 PCI Express x4 64 Fibre Channel FC 64 Ultra# [001] 64 #G/#G [001] 64 WAN interfaces 64 BigIron RX 64 Ethernet Fibre Channel 64 #Gb s Ethernet [002] 64 Rapid IO 64 Gigabit Ethernet XAUI 64 8G Fibre Channel 64 2Gb Fibre Channel 64 #.#af PoE 64 CN# [002] 64 #Gbps optical [001] 64 OC-#/STM-# [002] 64 #Gbit s [002] 64 FortiSwitch 64 Channel HBAs 64 #.#b wireless LAN 64 1Gb Ethernet 64 aggregation switches 63 SAN connectivity 63 OC-#/STM-# [003] 63 Gigabit uplinks 63 FireWire 63 #Mbps [001] 63 #Gbit [001] 63 serdes 63 USB Firewire 63 IP FCIP 63 Fibre Channel adapters 63 Firewire ports 63 #GbE switches 63 gigabit serial 63 serial ATA 63 routers 63 Alcatel OmniAccess 63 #.#b #.#g 63 linecards 63 IEEE #b 63 Gigabit Ethernet Switch 63 Gigabit Ethernet NICs 63 #GBASE 63 SCSI iSCSI 63 #GBase T 63 #.#g [001] 63 PCIe Gen 63 Ethernet SONET 63 WAN PHY 63 #Mbit/sec [001] 63 #-Gbit/sec 63 #Gig Ethernet 63 Gigabit Ethernet WAN 63 2Gbps Fibre Channel 63 SAS RAID 63 #.#Gb s [003] 63 #.#g Wi Fi 63 T1s 63 LVDS interface 63 CWDM 63 SCSI RAID 63 stackable switch 63 Gbps SAS 63 MACSec 63 ADSL2 + modem 63 pseudowire 63 Mbit Ethernet 63 SATA3 63 Dual Gigabit Ethernet 63 x4 PCI Express 63 XFP modules 63 8Gb Fibre Channel 63 #.#b/g/n 63 GBps 63 RJ# connector 63 cPCI 63 Ethernet GbE 63 1Gb s 63 #Gbps [002] 63 #/#Base-T Ethernet 63 PowerBook G4 DDR2 #mb 63 Parallel ATA 63 #/#BaseT Ethernet 63 PCIe x4 63 PCI Express Gen2 63 Fibre Channel interfaces 63 gigabit ethernet port 62 #Kbps modem 62 LVDS 62 #Gb/sec 62 Fibre Channel iSCSI 62 InfiniBand connectivity 62 IEEE# [002] 62 T#/E# T#/E# 62 HDMI DisplayPort 62 DVI HDMI 62 #.#Gbit s [002] 62 IxYukon 62 #Gb s Fibre Channel 62 Intel #L 62 USB#.# ports 62 POTS interfaces 62 #Mbit s [002] 62 Gbps InfiniBand 62 x1 PCIe 62 USB2 62 Ethernet Extender 62 T#/E# WAN 62 GbE switches 62 SATA 6Gb s 62 4 Gbit sec 62 rack mountable 62 Ethernet Switch 62 #G bps [002] 62 RJ# connectors 62 PoE switches 62 NetIron MLX 62 RS# RS# 62 #.#n router 62 nonblocking 62 Serial ATA 62 GPON optical 62 USB #.#/#.# 62 #Gb Fibre Channel 62 PCIe x# 62 #.#b wireless 62 multiprotocol 62 eSata 62 8Gbit s 62 wired LAN 62 gigabit switches 62 #G Ethernet [002] 62 Serial FPDP 62 AGP 8X 62 Gigabit uplink 62 SATA 3Gb s 62 gbps 62 QSFP + 62 8Gb FC 62 Draft #.#n 62 Ethernet POE 62 Serdes 62 CX4 62 VME# 62 PoE 62 GbE LAN 62 #.#Gb s [001] 62 DVB ASI 62 InfiniBand DDR 62 1Gbit/sec 62 Gb sec Fibre Channel 62 ConnectX 62 IP SAS SATA 62 Serial ATA drives 62 #/#Mbps 62 SATA controller 62 baud rates 62 SPDIF 62 RS-#/# 62 FireWire ports 62 FireWire# 62 BaseT 62 PC/#-Plus 62 OC-#/STM-# [001] 62 asynchronous serial 62 SATA 6G 62 PWE3 62 low latency InfiniBand 62 #.#G bps 62 Hypertransport 61 StarFabric 61 Gbps throughput 61 gigabit Ethernet interfaces 61 Fibre Channel switches 61 XFP module 61 SCSI 61 Fibre Channel SCSI 61 4X InfiniBand 61 E#/T# 61 Gen2 switches 61 Mbits sec 61 CAT5 61 Gigabit LAN ports 61 PCIe GbE 61 #GBASE SR 61 wired ethernet 61 #Mbits/sec [001] 61 HBAs 61 SATA interfaces 61 Ethernet PoE 61 Mbps 61 ExpressModule 61 cluster interconnect 61 iSCSI 61 DisplayPort 61 Ethernet switching 61 Summit X# 61 DDR# memory 61 #/#/#BASE-T Gigabit Ethernet 61 backplanes 61 PCI Express x# 61 #Gb [001] 61 x# PCI Express 61 1Gbit s 61 #Gb s [002] 61 SMC#L# 61 PCI Express x1 61 Ethernet Gigabit Ethernet 61 x1 PCI Express 61 KVMs 61 Universal Asynchronous Receiver 61 4GFC 61 OfficeConnect 61 LSI SAS# 61 #GbE [002] 61 #/#/#Mbps Ethernet 61 SANbox 61 3Com Switch 61 Ethernet TCP IP 61 #GbE uplinks 61 LAN PHY 61 Gen2 PCI Express 61 Server Adapter 61 #.#abg 61 SDIO interface 61 VXS 61 attached SCSI SAS 61 TigerSwitch 61 Ultra SCSI 61 SBC# [001] 61 GbE SFP + 61 Fibre Channel disks 61 CATx 61 SONET SDH 61 1Gb iSCSI 61 DDR InfiniBand 61 unshielded twisted pair 61 powerline adapter 61 #BaseT [003] 61 Resilient Packet Ring RPR 61 #GbE SFP + 61 HDMI 61 gigabit Fibre Channel 61 #MHz PCI 61 6Gb s SATA 61 PCI Express slots 61 Synchronous Digital Hierarchy 61 5Gbps 61 #.#g router 61 gigabit Ethernet switches 61 SATA ports 61 DS1s 61 Emulex 8Gb s 61 serial interconnects 61 8Gbit s Fibre Channel 61 Juniper T# 61 InfiniBand adapters 61 SerDes 61 5Gb s 61 #.#ah 61 SATA SAS 61 3U VPX 61 #/#Base-T 61 #.#n WiFi 61 OC-#/STM-# [004] 61 #.#a [001] 61 Gigabit speeds 61 BlueStor TM 61 Fibre Channel InfiniBand 61 #.#GT s 61 SATA controllers 61 SATA disk drives 61 FICON connectivity 60 SATA 6GB s 60 #.#g Wireless 60 HD SDI 60 Gbit Ethernet ports 60 1Gbps Ethernet 60 QAM channels 60 T#/E# circuits 60 HomePlug AV 60 ESATA 60 metro Ethernet 60 #.#n [001] 60 #ABG 60 QSFP 60 4Gb FC 60 6G SAS 60 DDR2 SDRAM 60 #BaseT [001] 60 Serial RapidIO ® 60 Mini PCI 60 VME#x 60 Copper Cabling System 60 PRO Wireless #BG 60 8Gbit/sec 60 Sonet SDH 60 #.#Tbps [002] 60 RGMII 60 Signaling Gateway 60 UART 60 S PDIF 60 DisplayPort connectors 60 #.#b/g/n Wi Fi 60 Gbits s 60 #Base X 60 AdvancedMC modules 60 #.#b Wi Fi 60 IEEE #.#af PoE 60 Gigabit WAN 60 IP DSLAMs 60 #.#n WLAN 60 PRO Wireless #ABG 60 datarate 60 Fibre Channel HBAs 60 channel DDR3 memory 60 multichassis 60 ATM Frame Relay 60 iSCSI connectivity 60 4Gbit Fibre Channel 60 HyperTransport TM 60 #.#bg 60 #GigE ports 60 #.#b WiFi 60 HyperTransport links 60 ethernet switches 60 InfiniBand switches 60 COM ports 60 SATA #.#Gb s 60 #/#/#BASE-T 60 USART 60 Gbit Fibre Channel 60 SATA #.#Gbps 60 SATA drives 60 Mbits s 60 PMC XMC 60 6Gb 60 1U server 60 SONET EoS 60 unmanaged switches 60 muxponder 60 Broadband Router 60 Powerline adapters 60 HDMI v#.# 60 Ethernet adapter 60 multiport 60 Mellanox ConnectX 60 BigIron 60 EX# [004] 60 WiFi #.#n 60 #Gbit/sec Ethernet 60 iSCSI storage 60 HDD SSD 60 Ultra DMA 60 CAT6 60 TDM ATM 60 #.#b [002] 60 U# SCSI 60 #x# MIMO 60 DSLAM 60 LVDS interfaces 60 Gigabit interfaces 60 SATA 3Gbps 60 XMC 60 #Gb s InfiniBand adapters 60 SFP + transceivers 60 ICH#R 60 SONET DWDM 60 workgroup switches 60 NetIron MLX Series 60 Muxponder 60 SONET OC 60 eSATA port 60 T#/E# interfaces 60 6Gb s SAS SATA 60 MicroTCA platforms 60 IEEE #a 60 DVI outputs 60 network adapters CNAs 60 DVI VGA 60 GPON 60 MoCA enabled 60 VGA HDMI 60 #Gb iSCSI 60 DisplayPort outputs 60 Gigabit Ethernet transceivers 60 Dual DVI 60 eSATA connector 60 ExpressCard 60 DIMM sockets 60 Fibre Channel disk drives 60 Gigabit Ethernet SFP + 60 #/#/#BASE-T ports 60 #Gbps throughput [001] 60 VSC# [001] 60 SAN switches 60 BigIron MG8 60 Gb Ethernet ports 60 SS7 signaling 59 #G Fibre Channel 59 #Gbs 59 XFP 59 #BaseT [002] 59 Serial ATA RAID 59 Gbit s Fibre Channel 59 PoE Plus 59 Gigabit Ethernet adapter 59 CoreDirector 59 Dual Link 59 rackmount servers 59 iWARP 59 Wi Fi #.#n 59 #.#af Power 59 GbE adapters 59 SBC# [004] 59 HDMI #.#a 59 MPC#E 59 E7 Ethernet Service 59 #Mbit/sec [002] 59 IEEE #.#a/b/g 59 Mbit s 59 TigerSHARC 59 #.#a/b/g/n 59 #G Ethernet switches 59 SAS expander 59 USB# [002] 59 GB sec 59 CompactPCI 59 Firewire IEEE 59 SAS disk drives 59 DB9 serial 59 Gb Fibre Channel 59 EX# switches 59 Firewire 59 Host Adapters 59 #GbE PHY 59 Cat5e 59 DOCSIS ® 59 EoS 59 #bit PCI 59 #.#b g Wi Fi 59 #G optical [001] 59 RAID controller 59 #.#b/g/n wireless 59 JBODs 59 OC #c 59 analogue VGA 59 SDI HD SDI 59 external SATA eSATA 59 Gb s SAS 59 multiplexer 59 4Gbps FC 59 #GBASE KR 59 dual DVI 59 bus adapters HBAs 59 Compact PCI 59 EN #G 59 SFP transceiver 59 SONET SDH protocols 59 density #GbE 59 GBit 59 gigabit Ethernet #GbE 59 IDE connector 59 HDMI DVI 59 Cat6 59 ONUs 59 STM-#/OC-# 59 SCSI SAS 59 Brocade switches 59 serial transceivers 59 SATA2 59 6Gbps SATA 59 RAID adapter 59 Gb 59 Interface Card 59 #BASE T [001] 59 Alcatel OmniSwitch 59 SMC#M 59 Bonded ADSL2 + 59 iSPAN 59 Wireless Broadband Router 59 IEEE #.#n draft 59 Ethernet transceivers 59 FCoE 59 #GbE adapter 59 infrared IrDA 59 SRX# [001] 59 #GbE adapters 59 RS #C 59 VMEbus 59 GGL# 59 Gigabit Switch 59 Fast Ethernet switches 59 multimode fiber 59 6Gb SAS 59 PCI slots 59 Serial ATA SATA drives 59 #/#Mbps Ethernet port 59 #/#BASE-T 59 GbE controller 59 Gb s optical 59 #.#n APs 59 Nortel ERS 59 SFP + module 59 #/#Base-TX 59 G.SHDSL 59 DS1 DS3 59 DVI connector 59 Brocade FastIron 59 SATA RAID controller 59 FICON 59 Gbits 59 #Base T Ethernet 59 pluggable modules 59 SATAII 59 #K V.# modem 59 datarates 59 PCIe x1 59 #.#af compliant 59 Fibre Channel HBA 59 IPv#/v# 59 4G Fibre Channel 59 analogue inputs 59 SCSI interfaces 59 CompactFlash socket 59 SHDSL 59 4U chassis 59 Gb s InfiniBand 59 #G EPON 59 DDR2 SDRAMs 59 VGA DVI 59 VGA connectors 59 iSCSI adapters 59 IEEE #.#g 59 AC'# 59 Serial ATA SATA 59 #Base T [002] 59 line terminal OLT 59 RangeMax 59 Gigabit SFP 59 HDMI outputs 59 #Base SX 59 VDSL2 59 SBOD 59 #G [002] 59 modem router 59 circuit emulation 59 RackSwitch G# 59 Virtual Chassis 59 #Base T [003] 59 4 Gb Fibre 59 #mb DIMM 59 passive backplane 59 DWDM 59 SONET rings 59 IEEE#.# [001] 59 midspans 59 V.# modem 59 SDI inputs 59 PCI Express Gen 59 Voltaire Grid Director 59 mesh nodes 59 FastStream SC 59 Ethernet MACs 59 Infiniband switches 59 #Gb Ethernet connectivity 59 GZIP compression 59 RocketRAID 59 Gigabit Ethernet LAN 59 6U VME 59 #.#b/g/n WiFi 59 HiGig 58 #G PHY 58 RJ# ports 58 Ficon 58 ESCON 58 FCoE iSCSI 58 gigabit ethernet ports 58 AMD HyperTransport 58 #Mb Ethernet 58 wireless LAN 58 SATA interface 58 #/#/# LAN 58 coaxial 58 Cat 5e 58 QLogic HBAs 58 3U chassis 58 #.#n Router 58 HD SD SDI 58 GbE switching 58 USB eSATA 58 #.#g WLAN 58 BNC connectors 58 BlackDiamond # 58 reconfigurable optical 58 SATA 6Gbps ports 58 Gigabit LAN port 58 #.#g wireless LAN 58 Draft #n 58 GbE PHY 58 fiber uplinks 58 MEF certified 58 AGP 8x 58 GS#T 58 Celerra NSX 58 #Gbps serial 58 #.#n Wi Fi 58 RS# serial ports 58 NetIron 58 #.#a/g/n 58 Ethernet LANs 58 DDR3 memory 58 IPv4 IPv6 58 #.#Gbps [002] 58 RS-#/#/# 58 Myri #G 58 ZigBee mesh 58 1Gbps 58 #Gb s QDR InfiniBand 58 Ethernet NICs 58 Rapid Spanning Tree 58 Mbit s Ethernet 58 Industry Highest Density 58 HDMI VGA 58 ATA# [001] 58 RGBHV 58 AMD AM3 58 Advanced Switching 58 RS#/#/# 58 opto isolated 58 Ethernet MPLS 58 Generic Framing Procedure GFP 58 2eSST 58 #.#af 58 GPIB interface 58 SAS JBOD 58 LX4 58 #Mb s [003] 58 VPN routers 58 USB3 58 Wavelength Division Multiplexing WDM 58 D Link DWL 58 PC/# 58 #/#G [002] 58 SCSI SATA 58 RAID adapters 58 3Gbit s 58 Mbps #.#g 58 Gbps DWDM 58 PCI PCI 58 Tb s 58 6Gb s SAS 58 QLogic Fibre Channel 58 iSCSI HBAs 58 XAUI interface 58 #.#Gbit s [001] 58 Powerline AV 58 CompactPCI ® 58 ExaScale switch 58 RS#/# 58 Virtual Fabric 58 RS#/RS# 58 pluggable transceiver 58 #/#G Ethernet 58 PCIe x# slots 58 AFBR 58 InfiniBand QDR 58 DisplayPort HDMI 58 ATM MPLS 58 HD SDI input 58 Dialogic ® 58 USB2 ports 58 analog inputs 58 Promentum ATCA 58 x# slots 58 RS# serial 58 interconnects 58 #a/b/g 58 uplinks 58 IPv6 routing 58 blade servers 58 SRX# [002] 58 Gigabit PHY 58 #Mbps #.#g 58 RapidIO 58 DeckLink cards 58 SFP + optical 58 Packet Processor 58 Mellanox InfiniBand 58 gigabit Ethernet GbE 58 SCSI disks 58 Serial ATA ports 58 #.#a g 58 PCIe slots 58 DWDM optical 58 SAS RAID controller 58 EPON 58 bonded ADSL2 + 58 Gbs 58 #Mbps #Mbps [002] 58 PCI PCIe 58 iWarp 58 iSCSI protocol 58 ATCA blade 58 #Base TX 58 Gigabit Ethernet Switches 58 Fibre Channel FCoE 58 AdvancedTCA 58 6Gbit s 58 NEBS compliant 58 1U chassis 58 #:# LVDS 58 #BASE FX 58 Ethernet PHY 58 Socket AM2 + 58 #.#Gb s [002] 58 ADSL2Plus 58 GigE Vision 58 iSCSI offload 58 #BASE T [002] 58 AdvancedTCA chassis 58 CWDM wavelengths 58 Fibre Channel SAN 58 8Gbit s FC 58 ISDN BRI 58 deterministic Ethernet 58 iWARP RDMA 58 SFP module 58 DWDM wavelengths 58 6Gbit/sec 58 synchronous optical 58 IEEE #.#x [002] 58 #Tbps 58 DP QPSK 58 1U 58 XPort# 58 #.#Gbps [003] 58 Mellanox #Gb s 58 LAN Ethernet 58 #BASE X 58 VGA DVI D 58 ADSL2 57 GPON ONT 57 MegaRAID SAS 57 #Mb/sec [002] 57 Fiber Driver 57 iPECS ES 57 dual UARTs 57 #mbps [001] 57 #.#a #.#b 57 4GB DDR3 57 Ethernet WAN 57 eSATA ports 57 #.#n MIMO 57 KVM switches 57 lossless Ethernet 57 gigabit router 57 serverboards 57 WAN routers 57 MAC PHY 57 iQ# [001] 57 Mb s 57 ADSL2plus 57 3Gb s SATA 57 drop multiplexer ROADM 57 transceiver modules 57 USB peripherals 57 SATA2 ports 57 SATA disks 57 analogue outputs 57 HDCP compliance 57 compact 1U 57 PCIe x# slot 57 Circuit Emulation 57 IEEE #.#ah 57 fiber cabling 57 XRN 57 CompactPCI Express 57 #GBASE LR4 [001] 57 Optical Multiservice Edge 57 optical DWDM 57 VPN router 57 Gbps SATA 57 #GX [001] 57 port #/#/# Mbps 57 #G uplink 57 IPv#/IPv# 57 mini GBIC 57 IEEE#.#b 57 VoIP gateways 57 NexusLink 57 Ethernet-over-SONET/SDH 57 Modbus TCP