Related by context. All words. (Click for frequent words.) 69 TDM PBX 66 packet switched 66 PBX IP PBX 65 IP centrex 65 VoIP 65 IPBX 64 PSTN 64 converged IP telephony 64 Ethernet MPLS 64 TDM PBXs 64 legacy PBXs 64 legacy TDM 63 DWDM optical 63 PSTN connectivity 63 PTSN 63 IP telephony 63 OmniPCX Enterprise 63 PSTN gateways 63 VoIP softswitch 63 VOIP 63 PBX telephony 63 5ESS 63 PBXs 63 MSBG 63 softswitching 62 datacomms 62 NexTone IntelliConnect System 62 IPPBX 62 PBXes 62 TDM ATM 62 multiservice switches 62 TDM switches 62 LANShield Switch 62 metro DWDM 62 MPLS multiprotocol label 62 Packet Optical 62 SIP PBX 62 G.# codec 62 VolP 62 Session Initiated Protocol SIP 62 IMS SIP 62 VPN router 62 LANs WANs 62 telephony 62 OSSs 61 IPv4 IPv6 61 trunking gateway 61 PBX KTS 61 TDM IP 61 SIP Trunk 61 Diameter signaling 61 Unified MBX 61 PABXs 61 unified comms 61 #.#/#G 61 Gigabit PON GPON 61 CoreDirector 61 4G/WiMAX 61 ADSL2 + VDSL 61 SONET SDH optical 61 NexTone SBC 61 IP Telephony IPT 61 NEC Univerge 61 IPsec VPNs 61 packetized voice 61 ATM Frame Relay 61 VoDSL 61 TDM SONET 61 Ethernet Switching 61 IP VPN MPLS 60 SIP Session Initiated Protocol 60 converged IP MPLS 60 VoIP Telephony 60 IMS architectures 60 PSTN gateway 60 Fusion Efonica branded 60 Wi-Fi/cellular 60 superclass softswitch 60 SIP trunks 60 SONET rings 60 #Gbit s Ethernet [002] 60 Thomson Cirpack 60 GPRS EDGE UMTS 60 VPN firewall 60 IPoDWDM 60 eMTAs 60 Frame Relay ATM 60 SOHO routers 60 metro ethernet 60 multihop 60 Session Initiation Protocol 60 IPv#/IPv# routing 60 Centrex IP 60 wireless intrusion prevention 60 HyperPipe 59 IP trunking 59 Cisco IP telephony 59 Siemens SURPASS 59 3Com NBX 59 ISDN DSL 59 Sonet SDH 59 TDM circuits 59 Layer 2/Layer 3 59 BT Onevoice 59 Hosted IP PBX 59 PBX 59 PacketCable compliant 59 multipoint conferencing 59 Taqua MobileWorks 59 #G coherent [001] 59 Lucent IMS 59 Synchronous Digital Hierarchy 59 #Gbps optical [001] 59 Telchemy VQmon 59 Lucent BSR 59 desktop video conferencing 59 Univerge 59 T1 circuits 59 OCS R2 59 Ethernet LANs 59 NGIN 59 IP Multicast 59 VoIP Gateways 59 Glimmerglass optical 59 Alcatel Lucent OmniPCX Enterprise 59 NAT Traversal 59 firewalls routers 59 division multiplexing TDM 59 modems routers 59 IP MPLS Ethernet 59 IP anycast 59 IP Anycast 59 Time Division Multiplexing 59 VoCable 59 multiservice edge 59 SS7 ATM 59 IP PBXes 59 MyCall 59 Allot NetEnforcer 59 Nortel DMS 59 serverless 59 EtherSpeak 59 #G GPON 59 MSPPs 59 Soft Switch 59 PSTN interconnection 59 GlobalConnect 59 IP PBX 59 wireless LAN deployments 59 DeBeasi 59 #/#.#G 59 Netcool solutions 58 MPLS Multiprotocol Label Switching 58 M CMTS 58 PDH SDH 58 Juniper routers 58 reconfigurable optical 58 Wavelength Division Multiplexing WDM 58 SDH SONET 58 SIP MGCP 58 CSU DSU 58 VoIP PBX 58 IPv6 multicast 58 MPLS backbone 58 ServAssure Live 58 wired LANs 58 SIP H# 58 lossless Ethernet 58 Box Fon WLAN 58 DSL modem router 58 SIGTRAN 58 IP MPLS VPN 58 NEC UNIVERGE 58 TDM interfaces 58 MSC Servers 58 SS7 signaling 58 VoB 58 TDM 58 AudioCodes Mediant 58 digital headend 58 NAT firewalls 58 W-CDMA/HSPA 58 switchless 58 packet backhaul 58 Label Switching 58 GE PON 58 mSwitch 58 Brocade Fibre Channel 58 NEAX 58 Advanced Routing 58 powerline phoneline 58 Ethernet SONET 58 Ethernet WAN 58 ADSL VDSL 58 Powerline adapters 58 VoIP telephony 58 centrex 58 UMTS/3G 58 division multiplexed TDM 58 Dimetra IP 58 inverse multiplexing 58 PBB PBB TE 58 deskphones 58 virtual LANs VLANs 58 DOCSIS cable modems 58 NGN IMS 58 SIP trunk 58 Phybridge UniPhyer 58 V2oIP 58 UNE L 58 UTP copper 58 Spanning Tree Protocol 58 pseudowires 58 SONET Ethernet 58 BroadSoft BroadWorks 58 VoiP 58 InterPort TM 58 WLan 58 Fibre optics 58 photonic layer 58 Calix C7 platform 58 IP multimedia subsystem 58 VOIP telephony 58 ADSL routers 58 IP KVM switches 58 1G EPON 58 Multimedia Subsystem IMS 58 packetized 57 Lasser Raab 57 ADSL/ADSL2 + 57 GENBAND G9 57 MSBGs 57 CWDM DWDM 57 TDM Ethernet 57 Teknovus EPON 57 NEBS certified 57 OfficeConnect 57 OmniPCX 57 DCME 57 CAT 5e 57 mesh backhaul 57 VOIP TDM E1 57 Structured cabling 57 Polycom PVX 57 MetaSphere 57 CDPD 57 Alcatel OmniPCX 57 Profinet IO 57 hubs routers 57 FlexPath 57 CDMA 1XRTT 57 protocol multimedia subsystem 57 MEF certified 57 selects Alcatel 57 Broadvox SIP Trunking 57 BroadSoft BroadWorks R 57 Dawn Hogh 57 Pseudowires 57 VoBB 57 WAN router 57 fiber coax HFC 57 GoHello 57 SIP DECT 57 RoIP 57 Ingate Firewall 57 SIP Session Initiation Protocol 57 SIP trunking 57 routers firewalls 57 echo canceller 57 Softswitches 57 DWDM dense wavelength 57 EtherSphere 57 address translation NAT 57 LambdaUnite R 57 synchronous asynchronous 57 media gateways softswitches 57 FCoE switches 57 VPN routers 57 femtocells picocells 57 SIP endpoints 57 Avaya Aura ™ 57 multiservice switching 57 WLAN wireless LAN 57 TDMoIP 57 trunking 57 IP softswitch 57 Cisco Airespace 57 CIRPACK 57 seamless interworking 57 D2D backup 57 Multimedia Conferencing 57 ISDN PRI 57 Verso Clarent 57 SURFboard 57 #/#G [003] 57 Broadvox GO 57 W CDMA HSPA 57 #Gbps optical [002] 57 IP NGN architecture 57 Cat 6a 57 Machowinski 57 VoIP gateways 57 #G/#G/LTE 57 asynchronous transfer 57 Collaboration UCC 57 Wavelength Tracker 57 DACX Ameyo 57 Nortel CS# 57 1Gbit/sec 57 dialtone 57 SyncE 57 iDigi Platform 57 SIP protocol 57 AOL Pipex 57 Jaluna OSware 57 FICON connectivity 57 IPv#/v# 57 SIP Trunks 57 #Gig Ethernet 57 Passive Optical Networks 57 Essentra BAX 57 SS7 ISDN 57 Ethernet TCP IP 57 aXs GUARD Gatekeeper 57 UMTS femtocell 57 FTTH FTTB 57 FastIron Edge X 57 workgroup switches 57 SprintLink 57 FTTP deployments 57 Hitachi Com 57 IP PBXs 57 connectionless 57 iPBX 57 gateways routers 57 BCM# [003] 57 AcceleNet 57 PWLAN 57 iPECS ES 57 SIP VoIP 57 echo cancellers 57 #Base T [002] 57 WaveNet 57 Nortel Networks Succession 57 firewalls VPN 57 Secure Router 57 IP softphones 57 Nortel ERS 57 BroadWorks platform 57 Avistar C3 Communicator 57 Telecommunications DECT 57 Brocade VDX 57 Apprion delivers 56 FlexiPacket Microwave 56 ShoreTel UC 56 UTP cabling 56 servers switches routers 56 OADM 56 IMS TISPAN 56 aggregation switches 56 Nexus #V 56 Edge Routers 56 Ethernet Fabric 56 RADIUS servers 56 BroadSoft BroadWorks platform 56 mobile WiMax #.#e 56 Voice Mobility UCN 56 Avocent KVM 56 SIP SS7 56 QoS mechanisms 56 packetization 56 interwork 56 Voxitas 56 video conferencing endpoints 56 drop multiplexers ROADMs 56 Lotus Sametime Unified 56 network infrastructures Telanetix 56 IP Multimedia Subsystems 56 SoftMSC 56 wireless LANS 56 RRHs 56 gigabit Ethernet switches 56 Cisco AON 56 Gilat VSAT 56 Coarse Wavelength Division Multiplexing 56 Enterasys Matrix 56 Converged Messaging 56 SS#/C# 56 VQE 56 Powerful debug 56 Fibre Channel Gigabit Ethernet 56 hosted IP PBX 56 IPSec encryption 56 Strata CIX# [003] 56 Hyper Powered 56 MetroMesh 56 Mediant 56 Zhone MALC 56 Common Photonic Layer 56 LAN SAN 56 #Gb Fibre Channel 56 Spatial Atrium 56 OFDM orthogonal frequency 56 Enventis Sector provides 56 dual stack IPv#/IPv# 56 DSL aggregation 56 innovaphone 56 SDH Synchronous Digital Hierarchy 56 Deploys Acme Packet 56 MODBUS RTU 56 sub channelization 56 Cirrus Softswitch 56 Infinera optical 56 3Com VCX 56 Jabra T# 56 FTTH FTTP 56 Avaya Definity 56 Asterisk IP PBX 56 Gigabit PON 56 uMobility 56 ShoreTel Unified Communications 56 Customer Premise Equipment CPE 56 Structured Cabling 56 Rapid Spanning Tree 56 #Gigabit Ethernet 56 IEEE #.#x [002] 56 Packet Core 56 Synchronous Digital Hierarchy SDH 56 EMTAs 56 ADSL ADSL2 + 56 MLX Series 56 Onevoice 56 femto cells 56 JITC certified 56 IPsec VPN 56 Session Initiation Protocol SIP 56 Enea LINX 56 HP EVA 56 internetwork 56 WAN interfaces 56 LightSoft 56 softphones 56 Asterisk PBX 56 NAT firewall traversal 56 3GPP IMS 56 Protocol VRRP 56 UNIVERGE SV# 56 demarc 56 OmniPCX Office 56 Loop Carrier BLC 56 TrueNet 56 #G/#.#G 56 TotalRoam R 56 Toshiba Strata 56 MobileVoIP 56 dataplane 56 virtual LANs 56 analyst Serene Fong 56 Access Devices EADs 56 MPLS TE 56 MODBUS 56 ShoreTel IP telephony 56 HomePlug powerline 56 PABX 56 BroadSoft BroadWorks VoIP 56 OpenReach 56 Xten softphones 56 Multiservice Access Platform 56 Actelis carrier 56 LAN cabling 56 MPLS VPNs 56 WS# wireless 56 SIP Registrar 56 datacoms 56 Grandstream GXV# 56 MultiVantage Express 56 Ripwave 56 SCPS TP 56 #G/#G optical 56 Routers Switches 56 broadband VoBB 56 Mobility Router 56 Metro Ethernet Routing 56 Managed Telephony 56 fiber coaxial 56 Signaling Gateways 56 Ronald Gruia principal 56 Receives Unified Communications 56 Bahaa Moukadam Sunrise 56 #.#e compliant 56 IP softswitches 56 IP VOIP 56 Strata CIX# [001] 56 Atheros WLAN 56 Virtual LAN VLAN 56 datagrams 56 WAN connectivity 56 fiber cabling 56 application integration EAI 56 vIPer 56 Aruba wireless LAN 56 1G 2G 56 SmartVoice 56 IP backhaul 56 Flexi NS 56 MPLS QoS 56 ONUs 56 firewalls IDS IPS 56 Infonetics predicts 56 SIP IP PBX 56 mesh topology 56 Pseudowire 56 BroadSoft BroadWorks ® 56 SFP transceivers 56 seamlessly interoperates 56 HotZone Duo 56 Multi Protocol Label 56 multimode fibers 56 PremierSERV 56 Signaling Gateway 56 Visual UpTime Select 56 IPTube 56 WAN PHY 56 phones softphones 56 3Com H3C 55 Ethernet WDM 55 linearly scalable 55 iFCP 55 enteprise 55 MetaSwitch VP# 55 protocol SNMP 55 WDM wavelength division multiplexing 55 6DegreesIP 55 Synchronous Optical Network 55 Bonded ADSL2 + 55 IP VoIP 55 ADSL SDSL 55 DECT handsets 55 Ethernet backhaul 55 Cellular Backhaul 55 IP MPLS router 55 InternetTalker 55 wireless LAN WAN 55 #.#d WiMAX 55 IM P2P 55 Steven Shalita 55 ENUM registry 55 Brocade VCS 55 Wi-Fi/Cellular 55 IntelliConnect System 55 Circuit Emulation 55 Aspect EnsemblePro 55 IP softphone 55 IP PABX 55 sensor actuator 55 Ethernet Switches 55 LAN WLAN 55 femtocell gateway 55 interoperates seamlessly 55 SPH#D 55 Multiprotocol Label Switching 55 XRN 55 legacy microcell 55 NEC UNIVERGE SV# 55 LoopStar 55 CPE gateways 55 NAS iSCSI 55 SmartEdge routers 55 OADMs 55 Routing Switch 55 multicarrier 55 softswitch architecture 55 SpeedStream 55 VRRP 55 softswitch 55 Ethernets 55 GPON EPON 55 H.# MGCP 55 wireless LANs WLAN 55 OCTel ® 55 #-Gbit/sec 55 MGCP 55 Hosted PBX VoIP 55 softswitches 55 Nextone 55 Pannaway SCN 55 HSPA + LTE 55 #.#-# WiMAX 55 IMS VCC 55 fieldbuses 55 ETX #A 55 NuContact Center 55 ZoneGate 55 GbE connectivity 55 ERICSSON Ericsson 55 PSTN ISDN 55 Ethernet Backhaul 55 IP 55 Jasomi Networks 55 ethernet switches 55 MTP# 55 SIP 55 Attendant Console 55 EdgePoint PRO 55 Wi Fi VoWi Fi 55 Dzubeck 55 Qwest iQ 55 Comtrend NexusLink 55 digital hierarchy SDH 55 Quintum Tenor 55 UCaaS 55 CAPEX OPEX 55 optical multiplexer 55 TI TNETV# 55 TCP IP networking 55 ISDN BRI 55 IMS NGN 55 Cisco IP Telephony 55 Versant Object Database 55 UDP TCP 55 IPv#/IPv# 55 Ubiquity SIP Application Server 55 Angoss predictive analytics 55 IP multicast 55 IP RAN 55 IP SAS SATA 55 Protocol VoIP 55 ZIP #x# 55 ISR G2 55 MNS 6K 55 Telephony Integration 55 Calix C7 55 tunable optical 55 #/#BASE-T 55 ADSL2Plus 55 MOTOMESH Duo 55 ProVision ASIC 55 EoC 55 Infineta 55 BlackDiamond #K 55 #BaseT [001] 55 E#/T# 55 CDMA femtocell 55 Ciena Carrier Ethernet 55 NoiseFree VoIP 55 #.#b wireless LAN 55 Packet Optical Edge 55 protocol interworking 55 trunking gateways 55 Ntl Telewest Business 55 division multiplexing 55 ADSL2 + VDSL2 55 Cisco TrustSec 55 Comdasys 55 Cisco CallManager Express 55 softphone 55 Toshiba Strata CTX 55 photonic switching 55 LambdaUnite MSS 55 supplemental downlink 55 FastIron GS Series 55 Switching MPLS network 55 Hybrid Fiber Coax 55 Evolium 55 TaquaWorks 55 WiMAX basestation 55 6WINDGate software 55 WiNG 5 55 Trapeze Mobility System 55 EPON GPON 55 Hitachi EPON 55 IBM Lotus Sametime Unified 55 Telogy Software 55 VOiP 55 Alvarion WiMAX 55 IOS XE 55 #G OTN [001] 55 Sigtran 55 XO SIP 55 Barix Annuncicom 55 CIX# [003] 55 Optical Multiservice Edge 55 WLR3 55 WPANs 55 Nevis LANenforcer 55 SS7 SIP 55 WLAN WWAN 55 Wyse VDA 55 multiservice provisioning platforms 55 Residential Gateways 55 KVMs 55 Data Serving Node 55 VoWi Fi 55 Vmux 55 DynaMate 55 Tatara Convergence Server 55 #.#x authentication 55 SIPxchange 55 PowerTerm ® 55 IP Telephony 55 iNFINITI 55 Avaya PBX 55 TCP IP iSCSI 55 Kodiak RTX System 55 TDM VoIP 55 Wave Division Multiplexing 55 protocol Label Switching 55 PIKA Connect 55 Cisco SBCS 55 Borderless Networks 55 Dietmar Wendt president 55 DQPSK 55 MVTS Pro 55 Spirent TestCenter Live 55 VoIP trunking 55 GSM GPRS EGPRS 55 SoIP 54 BankFusion Universal Banking 54 POTS ISDN 54 iWDM 54 Amdocs ClarifyCRM 54 3G multimode 54 IPitomy 54 Token Ring 54 multivendor multitechnology Nokia NetAct 54 IPCentrex 54 structured cabling systems 54 SDH PDH 54 Citel Technologies 54 Gigabit Ethernet uplinks 54 #G iMAP integrated 54 StreamScope eRM 54 Vo Fi 54 #Gb Ethernet [002] 54 Packet Voice 54 UMA GAN 54 VoATM 54 Broadband Telephony 54 optical DWDM 54 Switching MPLS 54 3GPP standardized 54 multipoint video conferencing 54 LAN WAN connectivity 54 DS1 DS3 54 HiPath MobileConnect 54 virtualised infrastructures 54 Occam GPON 54 MX ONE 54 Gigabit WAN 54 multihoming 54 Borderless Networks architecture 54 OSI Layer 54 MF TDMA 54 Fault tolerant 54 SIP telephones 54 #/#/# Ethernet 54 Zarlink ToP 54 edge QAMs 54 FIPS compliant 54 eNodeBs 54 PowerQUICC III processor 54 Gigabit Ethernet Fibre Channel 54 Wavelength Division Multiplexing 54 integration EAI 54 1G Ethernet 54 #G optical [001] 54 IP Centrex 54 equipment manufacturers TEMs 54 DSL modems 54 virtualised desktop 54 Masergy 54 Starent ST# 54 units ONUs 54 PacketCable TM qualified 54 MiriATE 54 multichassis 54 InterOP 54 Virtual Chassis 54 Access Concentrator 54 iDirect Evolution platform 54 Astaro RED 54 SMS USSD 54 openUC 54 SDH DWDM 54 Jasomi 54 Managed Router 54 GSM GPRS cellular 54 ReFLEX 54 IP Multiprotocol Label 54 Gigabit interfaces 54 IntelePeer AppworX 54 DTV PCTV DVR 54 Nexperia cellular system 54 wireless Lans 54 Edgecore 54 Acopia ARX 54 Micromuse Netcool 54 WAN routers 54 ADVA Fiber Service 54 VPN gateways 54 WCDMA CDMA 54 Service Providers SPs 54 Provider Backbone Transport 54 VPN tunneling 54 SAFARI C3 54 SANTap 54 Motorola SoftSwitch 54 Ubigate 54 PoE injector 54 dualmode 54 CDMA 1xRTT 54 Cat5 cable 54 nCite 54 Redback routers 54 Megapath 54 wavelength division multiplexing 54 Nortel MCS 54 decode encode 54 Zarlink CESoP 54 Alcatel OmniSwitch 54 FreedomIQ VoIP Hosted PBX 54 vSwitch 54 UNIVERGE 54 Unified Comms 54 TCP acceleration 54 FTTx deployments 54 Carrier Ethernet switches 54 Ethernet aggregation 54 xPON 54 Dimetra IP Compact 54 #Gbit Ethernet 54 CopperCom CSX 54 AudioCodes gateways 54 VoIP SIP trunking 54 IPv6 protocol 54 HN# Series 54 WLAN routers 54 multiprotocol 54 IAX2 54 Wireless LAN Controllers 54 TECORE 54 bursty traffic 54 CMTSs 54 Gigabit uplink ports 54 Ixia IxNetwork 54 M7i 54 Ruckus MediaFlex 54 Aspera fasp 54 pseudowire 54 RFS# 54 medianet 54 VoiceGenie platform 54 optical fiber cabling 54 ASN GW 54 fiber coaxial cable 54 Juniper Networks EX# Ethernet 54 hiT 54 3Com OfficeConnect 54 Wireless LAN WLAN 54 IP MPLS routers 54 OCTel R 54 Cisco Tandberg 54 FXO ports 54 IEEE #.#Q 54 RSTP 54 Octasic Vocallo MGW 54 Communité 54 Rostrvm 54 Samsung OfficeServ 54 wirless 54 MIMO antenna 54 Modius OpenData 54 Internet SCSI iSCSI 54 Gbps wavelengths 54 Ethernet Extenders 54 IP telephony IPT 54 Alcatel OmniPCX Office 54 LC connectors 54 NetEx HyperIP 54 ADC Krone 54 SeaChange VOD 54 Strata CIX 54 IPTV Middleware 54 Node Bs 54 Echo Cancellation 54 Sametime Unified Telephony 54 PowerBand 54 IPVPN 54 ETM System 54 MVTS II 54 #Gbps Ethernet [001] 54 Gbps optical 54 FoIP 54 Force# switches 54 Hosted Telephony 54 Ethernet switching 54 VNOs 54 DS1s 54 PROVISO 54 Ethernet Gigabit Ethernet 54 ISR routers 54 EdgeConnect 54 #Gbs 54 ENTICE 54 SONET EoS 54 LLDP MED 54 IP NGN 54 Paula Bernier 54 Unified Messaging UM 54 cordless DECT 54 eFMC 54 InstantOffice 54 LightningEdge 54 LignUp Communications Platform 54 GSM EDGE W CDMA 54 TDAzlan 54 Wi max 54 DesktopDirect 54 Optical Multiservice Edge OME 54 VSANs 54 xDSL modems 54 Single RAN 54 multimedia subsystem 54 Cognitronics 54 ThinkEngine 54 Adaptive Streaming 54 virtualised server 54 MergePoint Unity 54 density #GbE 54 #n APs 54 InfiniScale IV 54 ADSL Asymmetric Digital 54 Voice Messaging 54 FTTp 54 Unified Communication 54 NetCracker OSS 54 Netcool 54 SONET ATM 54 Personal Handyphone System 54 MoneyMap ® 54 Nokia NetAct 54 W CDMA 3G 54 XCast 54 Lucent Softswitch 54 Sphericall IP PBX 54 Cisco AVVID 54 small-office/home-office 54 User Datagram Protocol 54 Mbps symmetric 54 GbE switching 54 BroadWorks VoIP 54 QuesCom 54 uReach 54 IPTV VoD 54 Hi FOCuS 54 4G Fibre Channel 54 Serverless 54 ip.access Oyster 3G 54 GSM backhaul 54 impedance mismatches 54 Gigabit PHY 54 EPABX 54 Cloakware Password Authority 54 BelAir Networks patented 54 VoEX 54 multiplex TDM 54 IP multicasting 54 #G #G [002] 54 Cisco ISR 54 Completes Interoperability Testing 54 EMC Celerra NAS 54 BorderWare SIPassure 54 RFPON 54 Converged Application Server 54 Multiservice Switches 54 Avaya VENA 54 PacketCable Multimedia 54 Telkonet develops 54 BT MobileXpress 54 #GbE connectivity 54 Minerva iTVManager 54 ESCON 54 Gb s optical 54 RocketLinx ES# 54 Ethernet Extender 54 Quadro IP PBX 54 TDM backhaul 54 Serdes 54 Abner Germanow 54 TrueFocus 54 RealTunnel 54 Asynchronous Transfer Mode 54 multicast routing 54 MicroTCA TM 54 MapIT G2 54 IPSec tunnel 54 multiplexer demultiplexer 54 #Gbit/sec 54 zNID