2Towards the All-IP Telephone Network at Sweden’s Telco, TeliaSoneraThe TDM network will be too expensive to maintain. ISDN (BRI) subscriber lines to be scratched first.But there are the K (up to) 8 lines SMB PBXs (only in Sweden)2
3A Good Triple Play Network was Available InternetArchitecture deployed by carriers to assure QoS for and control of Voice, TV and other multimedia.VoIPMngIP-TVVoDLet’s makeSIPv1for SIP Trunkingof IP-PBXsPVC3PVC2PVC1PVC4VLANs or ADSL Virtual CircuitsADSL Modem“Triple Play”LANATA
4So Just Hook up the IP-PBX to the VoIP Pipe… TelephonyTVInternetPBX withsystemphonesSIP TrunkInterface REQUIREMENTS:As good as before (as TDM)8 simultaneous calls, 10 – 100 numbers4
5Telia SIP Connection, Business Broadband OVERVIEW Header: RelationTelia SIP Connection, Business Broadband OVERVIEWIP-PBXADSL-modemTriple play - BridgedTelia SIP ConnectionRegistrationSignalingTelephony gatewaysLoad balancingPort 1InternetVoIPPort 3Internet and VoIP travel over separate channels (PVC) and are delivered on separate physical portsDifferent subnets for Internet and VoIPDynamic public IP-addresses assigned to ports 1 and 3Prioritized capacity for eight concurrent calls on the VoIP channelOne DID telephone number corresponds to one SIP accountSO THE PBX WITH A SIP TRUNKING INTERFACE JUST HAS TO…Be DHCP clientRegister all accounts (all DID numbers) to Telia’s SIP platformCut and translated from Telia presentation
6There were some ISSUES IP-PBX ADSL-modem Nnn SIP Connection Add Router Header: RelationThere were some ISSUESIP-PBXADSL-modemTriple play - BridgedNnn SIP ConnectionRegistrationSignalingTelephony gatewaysLoad balancingRemote administrationAddRouterNAT?Port 1InternetVoIPLANWANPort 3If the IP-PBX can’t act as a DHCP client, some type of NAT-router must be used between the IP-PBX and the ADSL modem.And the IP-PBX must be able to register all SIP accounts on the Nnn platform.Some method has to be used in combination with the router for SIP traversal:STUN - Simple Traversal of UDP through NATs (Network Address Translation)SIP-ALG – Application Layer GatewayBut, remote administration over the same ADSL access is not possible…Cut and translated from Telia presentation
7Header: Relation…and a few more ISSUESIP-PBXADSL-modemTriple play - BridgedNnn SIP ConnectionRegistrationSignalingTelephony gatewaysLoad balancingRemote administrationPort 1InternetRouterNATVoIPLANWANPort 3More issues that have caused some headache:IP-PBX’s that only accepts calls from known servers (incompatible with load balancing)IP-PBX’s that only can register one account but expects incoming calls to all DID telephone numbers, using this single accountRouters which can’t handle fragmented IP packetsRemote administration over the same ADSL accessOut of 10 selected PBXs, none could be used straight of!Cut and translated from Telia presentation
9There are more things to consider… PSTNSIP Trunking Provider NetworkGWSIP SystemAn E-SBC should provide:NAT/Firewall Traversal – Must NAT to same address space!Basic SIP and Network Interoperability - E.g. Authentication, Registrations, UDP/TLS/TCP, Dynamic IP address, etc.SIP Repair - E.g. Call Transfer, Fragmented packets, Bugs, etc.Features - E.g. Remote Users, Administration (remote and local)Security - LAN/PBX/VoIP network protection, Service attack protectionSIP TrunkIX781)2) 3) 4) 5)2) 3) 4) 5)2) 3) 4) 5)VoIP & Data LANPBX Type 2IP-PBXFew PBXs are of this type. Asterisk with firewall (IPtables /NETfilter) can be compiled and configured this way, but requires a lot.VoIP & Data LANIP-PBXPBX Type 1Modern IP-PBXs are of this type. Media goes directly between phone and SIP Trunk. SIP Trunk Interface Signaling:Media:Data LAN onlyPBX withsystemphonesPBX Type 1.5
10And then make it easy to install and configure 10
13All worked fine – But, time to make SIPv2! New SIP IMS platformWill take over generally for the futureHigher scaleBut “more complex” SIP interfaceMore IP delivery networksADSL2+ AnnexM: Triple play as beforeFiberLAN: 100 Mbps Ethernet triple play (VLAN tagged)Prolane: Internet with priority VoIP channelInternet: Telia’s SIP Trunking over other providers Internet accessUp to 60 simultaneous calls per trunk group (8 in SIPv1)CPE / E-SBC comes with the service, owned by TeliaProvisioning and management by TeliaReused ACS (TR-069 management system) for residentialCombined with Intertex PBX selection WizardWhat is required from the CPE / E-SBC? Intertex IX78 still the choice!13
14Into the TeliaSonera Lab! Testing, integrating with management system (existing TR-069 ACS), creating a service……and checking new PBXsPBXs
15The Intertex IX78 Supports All of these Architectures! The IX78 Supports Many WAN Layer 2 and Layer 3 Architectures with QoS Separated WAN Interfaces (inherited from it’s triple play capabilities)Private Virtual CircuitsE.g. TeliaInternetADSLPVC1IP-TVVoDIMSVoIPPVC2PVC3E.g. TeliaInternetEthernetVLAN1IP-TVVoDIMSVoIPVLAN2VLAN3Virtual LANs (VLAN)E.g. B2InternetEthernetWAN1IP-TVVoDIMSVoIPWAN2WAN3IP QoS Separated SubnetsIP Level QoSE.g. BTInternetADSL or EthernetPriority3Priority2Priority1IMSVoIPIP-TVVoDThe Intertex IX78 Supports All of these Architectures!1515
16Performance and Call Handling Capacity Over 50 simultaneous calls (20 ms voice packets) carrying mediaCall rate of 8 calls/s in proxy mode and 3 calls/s in B2BUA mode. (more than required to support 50 simultaneous calls)Up to 255 registrations. SIP end-points can be more.CPU Usage:60 simultaneous calls without MOS degeneration were reached!
17IMS and More Required use of B2BUA Mode IP-PBXProxy ModeIP-PBX talks to ServiceRegistration/Authentication model must matchLittle configuration in the IX78Service credentials in the PBXB2BUA Mode (Proxy still doing the basics)IP-PBX only talks to the IX78Wider separation between PBX and ServiceService Credentials only in the IX78More SIP Normalization possibilities (e.g. REFER)Any new operator service platform only requires IX78 reconfiguration (the PBX configuration can remain)IP-PBX
21Support for UC LAN and Multimedia Terminals as well as Remote Users SIP Trunking ProviderPublic InternetGWPSTNSIP SystemRemote UsersIntertex IX78IP-PBXDemarcation point of service and bringing SIP communication to the LANData & VoIP LANSoft Clients and Multimedia Terminals
22Usage Together With Existing Firewall Also Important PSTNPSTNPublic InternetSIP Trunk ProviderGWSIP SystemIP-PBXNAT/FirewallBridge for Existing NAT/ Firewall (non SIP aware)Data & VoIP LANWAN SIParator mode allows the Ingate or Intertex to control data usage on the Pipe to assure sufficient voice bandwidth!WAN SIParator®SIP Trunk ProviderGWPublic InternetSIP SystemIP-PBXNAT/FirewallSIParator®Data & VoIP LANIf common IP pipe, the existing firewall must restrict bandwidth usage to allow sufficient voice bandwidth. Often problematic.
23Jonas Östergren, TeliaSonera, Interviewed Live from Sweden Using Omnitor application Allan eC:Voice: G.722 wide band codecVideo: H kbpsReal-time text: RFC4103Using standard SIP over the Internet.
24SIP Capable Firewalls See us at ITEXPO Room A208! Intertex Data ABRissneleden 45SE SundbybergSwedenTel:Ingate Systems Inc.7 Farley Road HollisNH 03049United StatesPh: +1 (603)Ph Sweden: