Related by context. All words. (Click for frequent words.) 68 Ducommun Inc 50 EWSD 41 Mixed Signal Oscilloscopes 40 PTI CORR 40 ContourGT X8 PSS 40 Achieves ISO #:# Certification [002] 40 Tallika 39 multilayer switches 39 RF subsystems 39 VMWare vSphere 39 Sialkot Gujranwala 39 XEN 39 Solar Inverter 39 XScale TM 39 eServer BladeCenter 39 Fujitsu Siemens Computers PRIMERGY 39 Optical Multiservice Edge OME 38 deploying uniquely architected 38 MicroTCA TM 38 diplexers 38 AdvancedMC TM 38 Intelligent Switching 38 Ample Communications 38 InfiniBand adapters 38 Multilayer Director 38 glueless interface 38 CompactPCI ® 37 ATCA MicroTCA 37 i.LON SmartServer 37 fasp 37 Achieves ISO # 37 Tape Libraries 37 Telvent DMS 37 PQX 37 Voltaire Grid Backbone 37 Earns ISO #:# 37 Delivers Secure 37 E pHEMT 37 SMARTMOS 37 DesignWare SATA 37 Structured Cabling System 36 Add Drop Multiplexer 36 InfinIO 36 Taqua T# 36 EPON ONU 36 IEEE #.#a/b/g/n 36 Series Ethernet Switches 36 AXI TM 36 Digivance 36 Priyank Bharti 36 μModule 35 Voltaire Grid Director 35 TTL CMOS 35 Performance Technologies SEGway 35 LightGAIN 35 InterPort TM 35 OpenWay ® 35 Symmetra 35 IP SAS SATA 35 Multiservice Access 35 PD# [002] 35 IEEE #.#af compliant 35 Le# [002] 35 PacketLight 35 SoftMSC 35 InfiniScale IV 35 C2SAT 35 LoopStar 35 QLogic SANbox 35 FlexSelect 35 Universal Edge QAM 34 Thin Film Solar Modules 34 #x#G [001] 34 modulators demodulators 34 ancillary terrestrial 34 DVStation Mini 34 Opalis Integration Pack 34 Marathon everRun 34 ATCA blade server 34 Synchronous Ethernet SyncE 34 Network IP NGN 34 TestPoint #Gbps 34 NanoBridge 34 Netgear ProSafe 34 transmitters receivers 34 Link OAM 34 nP# 34 Substation Automation 34 Smart Order Routing 34 Satellite Modems 34 LatticeEC 34 CPE gateways 34 SIMATIC 34 EMCON 34 Multilayer Fabric Switch 34 Serial RapidIO Gen2 34 LightSoft 34 Packet Optical Networking 34 Mobile Softswitch Solution 34 TDCM 33 iSCSI HBAs 33 edge quadrature amplitude 33 MultiVantage 33 NSA #MX 33 Optical Modulation Analyzer 33 GbE controllers 33 optical subassemblies 33 eSPC 33 CIRPACK 33 Access Devices IADs 33 DePON 33 Flexi NS 33 Fabric Switches 33 Liffe Connect 33 TimeScale 33 Voice Mobility UCN 33 DPSK 33 GuideBuilder 33 Juniper Networks routers 33 Multiservice Access Platform 33 Ixia IxNetwork 33 Add Drop Multiplexers 33 M#i [002] 33 McData switches 33 EMC Celerra NS 33 STM-#/OC-# 33 Spectra BlueScale 33 GPON EPON 33 interoperates seamlessly 33 Nortel CS# 33 8Gbit s 33 Brocade NetIron 33 Serial RapidIO ® 33 T-BERD/MTS-#A 33 port #/#/# 33 port #G Ethernet 33 Direct Injection Gasoline 33 Bus Converters 33 CENTUM VP 33 coarse wavelength division multiplexing 33 OASyS DNA 33 ExpEther 33 linear transducers 32 Fujitsu XG# 32 ATCA compliant 32 Baseboard Management 32 Connectrix 32 Glimmerglass optical 32 Dataprobe 32 Wireless Cable Modem 32 SecureStack 32 CommandCenter Secure Gateway 32 Sorrento GigaMux 32 VARs OEMs 32 quasi resonant 32 Services zl Module 32 CDCO 32 EVS #RT 32 tunable DWDM 32 SkyX 32 Infinera DTN optical 32 StrataXGS III 32 N#B [001] 32 USB DVI KVM 32 J#A 32 Packet Processing 32 IPITEK 32 SIP SS7 32 modular scaleable 32 Juniper Networks M# 32 Trident7 32 IronPoint Mobility 32 Nortel Networks Passport 32 Watt metal halide 32 DCX 4S 32 FastIron GS 32 HYDRAstor HS8 32 iSCSI HBA functionality 32 #mb PowerBook G4 32 FlexWave ™ 32 Metro Ethernet Routing 32 ENA# 32 SAFARI C 32 Personeta 32 Multiplexer 32 ServAssure Live 32 Fiber Bragg Grating 32 WSS modules 32 VocalTec Essentra 32 LightPulse HBAs 32 Selects Infinera 32 gigabit Ethernet #GbE 32 DS#/E# 32 SIP softphones 32 Virtualizer 32 Enea LINX 32 VINAX 32 Automated Material Handling 32 FastIron Edge 32 MicroNode 32 T1 E1 Analyzer 32 NI LabView 31 ModBus 31 Monics 31 Adapters CNAs 31 LVDS LVPECL 31 DeviceNet Profibus 31 Zarlink ZL# 31 SpectraGuard Enterprise 31 Storage Appliances 31 FiberConnect 31 iS# 31 GigaEdge 31 midspans 31 StoneGate appliances 31 MEF certified 31 Router SR 31 Multi Gigabit 31 LANShield Switch 31 Brocade Fibre Channel 31 Civcom 31 please visit www.EXFO.com 31 PCIe Gen 2 31 Physical Layer PHY 31 Cisco CallManager Express 31 ConnectPort X4 31 Telemetry Tracking 31 synchronous buck controller 31 ZenTime 31 MXV# 31 baseband RF 31 multimedia subsystem 31 Alopa 31 Multiservice Edge 31 Summit X#e 31 Carrier Ethernet switches 31 McDATA Eclipse 31 PXI instrumentation 31 Optical Switch 31 Ai Logix 31 UART I2C 31 ADC KRONE 31 Nortel MCS 31 TeleCard 31 CleanSource UPS 31 PHEMT 31 multiservice switching 31 Juniper EX# 31 Thomson Cirpack 31 PCI Express PCI 31 Thyristor 31 FastIron LS STK 31 PMBus interface 31 AMP NETCONNECT 31 GbE switching 31 Gigabit Ethernet WAN 31 Drop Multiplexer ROADM 31 KS# [002] 31 BLADE RackSwitch 31 Serial Device 31 Sensor Interface 31 Calix C7 Multiservice Access 31 Alcatel Evolium 31 NetIron MLX Series 31 ConSentry LANShield 31 ProSLIC 31 TenXc 31 Telchemy VQmon 31 Broadcom NetXtreme 31 Agilent N#B 31 Acquisition Processor 31 NETernity 31 EtherReach 31 Layer 2/Layer 3 30 M7i 30 WebSphere Message Broker 30 Ciena CN 30 4Gbit/sec 30 PHY MAC 30 CoreStream Agility 30 EZChrom Elite 30 iXTools 30 InterReach Unison 30 Microwave Radios 30 Midspans 30 Hitachi EPON 30 interprocess communications 30 Chelsio Delivers 30 WaveReady 30 Disk Library 30 NEBS certified 30 MBX IP 30 Ulticom Signalware 30 MicroTCA Carrier Hub 30 #GbE switches 30 Autoscope Terra 30 EdgeConnect 30 tunable dispersion compensation 30 multiservice routers 30 Fortinet FortiManager 30 Profinet IO 30 CWDM wavelengths 30 Lumentis 30 T#.# [002] 30 EtherMap PDH 30 Image Generator 30 Emulex InSpeed 30 iConverter 30 Console Servers 30 Softek TDMF 30 CESoP 30 #v# [004] 30 DQPSK 30 ASN GW 30 Omnesys 30 Common Photonic Layer 30 IP softswitch 30 ITU G.# [001] 30 Palletizing 30 Advanced Switching 30 Inkra 30 IP FCIP 30 FibeAir #P 30 JITC certified 30 FibeAir IP 30 MNS 6K 30 Digi Passport 30 QuickLogic CSSPs 30 NetAct network 30 Wavelength Division Multiplexing WDM 30 Nagpur Pune 30 EPON GPON 30 Parallel Sysplex 30 Switch Module 30 nCite 30 XDM 30 Packet Processor 30 Aztek Networks 30 HD Encoder 30 FIPS compliant 30 MLXe 30 Digi Connect 30 Dresser Masoneilan 30 Resilient Packet Ring RPR 30 LightningEdge 30 UPS uninterruptible power 30 Cisco Wireless LAN 30 Agilent #A [001] 30 FastIron Edge X 30 OmniReach 30 IP MPLS router 30 #G DWDM [001] 30 Fibre Channel Switches 30 Wireless LAN Controllers 30 disconnectors 29 IPv#/v# 29 Packet Core 29 WinPath3 SuperLite 29 Agilent E#C 29 GbE controller 29 Essentra BAX 29 Carrier Ethernet Switch Routers 29 IWLAN 29 Evolium 29 reconfigurable optical 29 Matisse Networks EtherBurst 29 #.#.# ZigBee 29 Alcatel Lucent GPON 29 PT SEGway 29 Brocade FastIron 29 HiPath MobileConnect 29 Signal Conditioner 29 PCI PXI 29 8Gbit s Fibre Channel 29 TDM ATM 29 AdvancedMCs 29 Coarse Wavelength Division Multiplexing 29 5ESS 29 Faridabad Noida 29 UTStarcom mSwitch 29 SEIL 29 #G Optical [001] 29 Gigabit uplinks 29 Packet Switch 29 #Gbps optical [001] 29 D Link xStack 29 Octasic Vocallo MGW 29 BigIron RX 29 LambdaUnite R 29 Tenor VoIP MultiPath 29 transformerless 29 MODBUS RTU 29 Brekeke PBX 29 Gbps InfiniBand 29 digital headend 29 IDT DisplayPort 29 Signal Analyzers 29 Nextone 29 Wavelength Selective Switch WSS 29 Canoga Perkins 29 PRI ISDN 29 MetroNID 29 Ethernet Aggregation 29 mSwitch 29 BroadGate 29 AMBA AHB 29 #/#G [002] 28 ADVA Optical Networking FSP 28 PROFINET IO 28 vIPer 28 Gigabit uplink 28 Automatic Meter Reading 28 RailComm 28 SS#/C# 28 #Gb Fibre Channel 28 ADRM 28 Megaco 28 Acoustic Emission 28 units ONUs 28 OrCAD 28 Combiners 28 SFP transceiver 28 Zonal Offices 28 Tx Rx 28 industrially hardened 28 OXC 28 Nortel DMS 28 Teseq 28 Signaling Gateway 28 EdgeMarc Network Services 28 CompactPCI Express 28 DES AES 28 Gbit s optical 28 Advanced Routing 28 USART 28 NEC Express# 28 iSCSI offload 28 mux demux 28 RTP RTCP 28 Juniper Networks EX 28 PRO/# 28 #xA 28 VI BRICK 28 Flashwave 28 Wavelength Division Multiplexing 28 Aperto PacketMAX 28 VDSL2 ADSL2 + 28 Input Voltage 28 Enterasys Matrix 28 pluggable optics 28 Aerohive cooperative control 28 ONUs 28 5E XC TM 28 XipLink 28 Nortel Common Photonic 28 Foundry ServerIron 28 Ethernet SONET 28 SS7 ATM 28 LinkProof 28 PoE injector 28 M CMTS 28 Sigtran 28 Packet Switching 28 Label Switching IP MPLS 28 NetIron #G 28 UTP copper 28 Dynamatic 28 StoreAge SVM 28 GDPS 28 SSA Baan 28 1G EPON 28 OPTera Metro 28 Motorola SoftSwitch 28 GPIB interfaces 28 EWE TEL 28 Ethernet-over-SONET/SDH 28 #GbE interfaces 28 CoreConnect 28 CorEdge 28 Arbor Networks Peakflow 28 BrightPath 28 Optical Multiservice Edge 28 CITTIO WatchTower 28 Kabel Noord 28 LTE EPC 28 SkyStream Mediaplex 28 seamlessly interoperates 28 Ethernet Demarcation 28 PCS7 28 TrangoLINK Giga 28 Lucent 5ESS 28 ADTRAN NetVanta 27 GPIB interface 27 Cisco IP NGN 27 linecards 27 Alcatel OmniPCX 27 Multiservice Platform 27 Remote Console 27 CWDM DWDM 27 optical DWDM 27 Data Serving Node 27 Cirrus Softswitch 27 GaAs PHEMT 27 Circuit Emulation 27 SDH PDH 27 #Gbit s Ethernet [002] 27 Cisco IOS Software 27 AT AR#S 27 Augmented Category 6 27 Echelon i.LON SmartServer 27 membrane electrode assembly 27 NetEx HyperIP 27 interleaved PFC 27 VoSKY Exchange Pro 27 OTN interfaces 27 RIP OSPF 27 Lucent Compact 27 Sonus GSX# 27 Brocade NetIron MLX 27 Packet ADM 27 Softswitches 27 InterPort 27 Hybrid Fiber Coax 27 ATS# 27 TrueNet 27 Fabry Perot 27 Gigabit PHY 27 IRIS payload 27 Conductix Wampfler 27 WAN interfaces 27 MicroTCA Carrier Hub MCH 27 IP MPLS Ethernet 27 Protocol IP 27 ETSI TISPAN 27 Essentra EX 27 Ixia XM# chassis 27 directional couplers 27 SoftSwitch 27 LGdispatch 27 HD SDI SD SDI 27 E1 T1 27 LXI compliant 27 SFP transceivers 27 #G OTN [002] 27 encryptor 27 Signaling Gateways 27 VME#x 27 EMC Celerra NAS 27 PacketWave 27 Encryptors 27 Packetarium 27 ADVA Fiber Service 27 remotely controllable 27 iTLA 27 softswitch architecture 27 DWDM ROADM 27 GPON Gigabit 27 Interface Cards 27 Multimedia Subsystem IMS 27 EtherTone 27 BroadAccess 27 4Gbit s 27 Ethernet Routing Switch 27 UltraNet 27 LVDS interfaces 27 Juniper routers 26 Brocade DCX Backbone 26 IBM z# 26 ANDA EtherReach 26 RapidFLEX 26 LONWORKS 26 packet switched 26 MC#i 26 #Base SX 26 Univerge 26 Etherjack 26 ProgrammableFlow 26 DIN rail mounted 26 LLDP 26 DiamondWave 26 Managed Switch 26 Synchronous Digital Hierarchy SDH 26 CMTSs 26 FLASHWAVE 26 3Com VCX 26 LinkStar 26 OLTs 26 HVDS 26 Multiservice Provisioning Platform MSPP 26 IP Telephones 26 EtherNID 26 SSH SFTP 26 Protocol Analyzers 26 PON OLT 26 Inmarsat GAN 26 Covergence Eclipse 26 DWDM optical 26 TJA# 26 Rack Mounted 26 Quintum Tenor 26 NetOmnia 26 RocketIO 26 SMLT 26 Cable Modems 26 Unshielded Twisted Pair UTP 26 nCipher nShield 26 optical multiplexer 26 SIP MGCP 26 HP ProCurve switches 26 ZebOS ® 26 NEBS compliant 26 nGenius 26 Vx7 26 Teknovus EPON 26 DCMs 26 Spirent SmartBits 26 Lucent Flexent 26 BACnet IP 26 Brocade switches 26 #Kv 26 OADMs 26 Annuncicom 26 Verizon IP Trunking 26 Rapid IO 26 WAN load balancer 26 Veraz ControlSwitch 26 FlexFabric 26 ASON 26 #/#BaseT 26 converged packet 26 IP VPN MPLS 26 Multiprotocol 26 E#C [002] 26 LANShield Controller 26 Toshiba Strata 26 Adaptive Streaming 26 modular cable modem 26 DS1 DS3 26 IPNet 25 Cyan Z Series 25 IP Telephony Solution 25 electromechanical switches 25 Switch Routers 25 IP multicast 25 FXO ports 25 BigIron RX Series 25 Fusion Splicer 25 OpenScape Voice Application 25 PoE ports 25 QLogic Fibre Channel 25 SunSet MTT 25 Ether Raptor 25 #-Gbit/sec optical 25 DataNet 25 NetRing 25 DSLAM backhaul 25 CPE chipsets 25 Dense Wave Division Multiplexing 25 Home Location Registers 25 Customer Premises Equipment 25 DWDM submarine 25 MetaLIGHT 25 VoIP softswitch 25 datacomm 25 SFP modules 25 Wavelength Tracker 25 Division Multiplexing 25 #BaseT [003] 25 IPControl 25 Ubiquity SIP Application Server 25 Selects VocalTec 25 GlobalConnect 25 WS# wireless 25 DWDM dense wavelength 25 Rx Tx 25 Echo Canceller 25 UHF SATCOM 25 6U VMEbus 25 Multiprotocol Router 25 Raritan CommandCenter 25 Cable Assemblies 25 Category 6a 25 Flexent 25 TigerAccess 25 termination resistor 25 BSS Audio 25 WiMAX CPEs 25 Gigabit PON GPON 25 LambdaUnite 25 Evolium ® 25 sensor actuator 25 photonic layer 25 Raman amplifiers 25 TOSA ROSA 25 SS7 signaling 25 converged IP telephony 25 GenSet 25 Spatial Atrium 25 Industrial Ethernet Switches 25 xCoupler 25 SONET EoS 25 Authentication Bypass Vulnerability 25 ONMS 25 Hitachi AMN# 25 Loop Carrier BLC 25 MSC Servers 25 servo amplifier 25 Gigabit Ethernet uplinks 25 SONET SDH optical 25 OmniPCX Enterprise 25 NuContact Center 25 Nortel Networks OPTera Metro 25 aggregation switches 25 IPPBX 25 encryptors 24 DWDM backbone 24 FXO port 24 CobraNet 24 PSTN gateway 24 MPLS VPLS 24 Rapid Spanning Tree 24 #BaseT [001] 24 SGSN 24 AFDX 24 OmniVista 24 innovaphone 24 Motorola ASTRO 24 photonic switches 24 OfficeConnect 24 SBOD 24 detachable antenna 24 Sinumerik #D 24 Access Devices EADs 24 Intraplex 24 Praesideo 24 InterReach 24 MPLS Multi 24 SIGTRAN 24 PASOLINK NEO 24 Service Access Nodes 24 SEGway 24 PROFINET 24 OS# [004] 24 PowerStar 24 BlackDiamond #K 24 Session Initiated Protocol SIP 24 MVTS II 24 GSM Gateways 24 IMS TISPAN 24 OC-#/STM-# [001] 24 UDP TCP 24 Encryptor 24 WinLink 24 Support Node 24 Alcatel OmniSwitch 24 Multimode 24 HotZone Duo 24 Flexi Multiradio Base 24 Switched Ethernet 24 NEAX 24 AlterPath 24 multiservice optical 24 Mux Demux 24 Dispersion Compensation 24 Fast Ethernet switches 24 FTTx networks 24 SuperStack 3 24 Emergency Stand Alone 24 Alcatel Lucent OmniPCX Enterprise 24 Bi Directional 24 SpectralWave 24 iPECS ES 24 #/#G [003] 24 ShoreTel IP telephony 24 Structured cabling 24 VQuad 24 Ethernet IP MPLS 24 Raman amplification 24 ROADM functionality 24 Dancom 23 rack ToR 23 SBC PremierSERV SM 23 MTS# 23 SAN Connectivity 23 serial RS# 23 Gbps transponders 23 Comtrend NexusLink 23 POL converter 23 OneAccess Networks 23 loopbacks 23 NexTone IntelliConnect System 23 kV AC 23 Zhone MALC 23 IPstage 23 MPLS multiprotocol label 23 Gigabit Ethernet uplink 23 BayStack 23 Iub 23 PortaSwitch Procinctus 23 WebMux 23 Customer Premise Equipment CPE 23 VoIP Gateways 23 Avocent KVM 23 CTstage ® 23 SmartClass 23 ARRIS C4 CMTS 23 CoreDirector 23 Nexus #V 23 Optic fiber 23 electromechanical relays 23 SpeedStream 23 Dense Wave 23 switchless 23 Infosat 23 Wireless Telephones 23 PTTs 23 Synchronous Optical Network 23 multiservice aggregation 23 Gigabit uplink ports 23 TDMoIP 23 iNFINITI 23 Packet Optical 23 UNIVERGE SV# 23 Backplanes 23 Telit modules 23 VSANs 23 OADM 23 VRRP 22 FXS ports 22 stateful failover 22 Weidmüller 22 Dual Homing 22 MediaStar 22 FibeAir 22 RTX# 22 KVM extenders 22 NEC UNIVERGE SV# 22 Juniper Networks T# 22 Multiplexers 22 T Multiprotocol Label 22 Pseudowires 22 Siemens SURPASS 22 IPv4 IPv6 22 NEC Univerge 22 GbE Gigabit Ethernet 22 T1/PRI 22 Location Register HLR 22 VPN router 22 SDH DWDM 22 quadrature amplitude modulation QAM 22 BSCs 22 Operator Console 22 IPsec VPN 22 FTTP deployments 22 iDirect iNFINITI 22 ASN Gateways 22 NetEnforcer AC 22 ADSL2 + VDSL2 22 SIP H# 22 Radiotelephone 22 Bonded ADSL2 + 22 Support Node SGSN 22 G.SHDSL 22 Brocade BigIron RX 22 P CSCF 22 Bidirectional 22 ENUM registry 21 Ciena CoreDirector 21 SDH Synchronous Digital Hierarchy 21 Foundation fieldbus 21 Interface Module 21 softswitching 21 multiservice provisioning platforms 21 Structured Cabling 21 Contivity 21 SS7 ISDN 21 bi directional amplifiers 21 Optical Ethernet 21 TDM Ethernet 21 Brocade Silkworm 21 Transmitter Receiver 21 Foundation Fieldbus 21 Westermo 21 ROADM Reconfigurable Optical 21 framer mapper 21 MSAG 21 MVTS Pro 21 FastIron SuperX 21 ORBCOMM satellite 21 HLRs 21 TDM interfaces 21 MPLS backbone 21 PlugLink 21 WiMAX modems 21 Ethernet TCP IP 21 multiservice edge 21 PDH SDH 21 Transparent LAN 21 Adaptive Modulation 21 IDSL 21 ArcFM 21 BACnet MS 21 SDH SONET 21 PoE switches 21 VoB 21 Switching GMPLS 21 HiPath 20 CONNECTORS 20 MetaSwitch VP# 20 MVTS 20 Echo Cancellation 20 ULH network 20 GBICs 20 PSTN gateways 20 Rack PDUs 20 Wireless Intercom 20 NEC UNIVERGE 20 protocol analyzers 20 Aruba APs 20 Nortel Optical 20 SmartSensor 20 Long Haul DWDM 20 T1 E1 20 MODBUS 20 Cisco IP Telephony 20 DCOSS 20 Sercos 20 DVI Extender 19 GENBAND C# 19 Polycom videoconferencing 19 legacy TDM 19 DES #P 19 MPLS routers 19 1GE 19 Transmode TM 19 Time Division Multiplexing 19 SERCOS III 19 EoS 19 MultiPath 19 TCP IP Ethernet 19 SEGway TM 19 Nokia TETRA 19 ISDN PRI 19 Alcatel Lucent OmniSwitch 19 Interbus 19 CDMA WLL 19 gigabit Ethernet switches 19 ESCON 19 iVoice Speech Enabled 19 Simatic PCS 7 19 Mode DTM 19 VoIP gateways 19 inverse multiplexing 19 CSU DSU 19 WAN failover 18 Calix C7 18 Virtual Concatenation 18 RTUs 18 3Com NBX 18 DECT handsets 18 TDM switches 18 NetVanta routers 18 Modbus RTU 18 MLPPP 18 Passive Optical Networks 18 Base Transceiver Station 17 TDM telephony 17 T#/E# circuits 17 Occam Broadband 17 GSM# [001] 17 G.# codec 17 trunked radio 17 AES# [003] 17 ISDN BRI 17 Infoblox appliances 17 LC connectors 17 CopperCom CSX 17 interswitch 17 multicast routing 17 Inteleflex 17 E#/T# 17 MSPPs 16 Proxim Tsunami MP.# 16 WaveNet 16 SDH 15 Telecenter 15 Shortest Path Bridging 15 Synchronous Digital Hierarchy 14 X.# [001] 14 Asynchronous Transfer Mode 14 Automatic Vehicle 14 TDMA GSM 14 EPABX 13 Ethernet Extenders 13 VolP 13 SONET rings 13 fieldbuses 13 Avaya Definity 11 Nortel Norstar