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EarthLink BusinessSIP TrunkingShoreTel 14.2 IP PBXCustomer Configuration Guide

Implementation GuidePublication HistoryFirst Release: Version 1.0 – August 30, 2011CHANGE HISTORYVersionDateChange DetailsChanged By1.01.18/30/20117/15/2014Original Document DraftModified for ShoreTel 14.2Dantley ThomponMike Machnik AUTHOR:Dantley ThompsonEarthLink Engineering2Proprietary and Confidential – EarthLink Business

Implementation GuideTable of ContentsDocument Purpose 4Product Summary 4Network Architecture and Design 5Media Attributes and Codec Negotiation 7Codec Support 7G.711u 7G.729a 7Packetization Time 7DTMF Support 7Fax and Modem Support Requirements 8North American Numbering Plan Format 8Quality of Service Policy 8EarthLink SIP Trunking to IP PBX Interoperability 9Adtran Software Version Tested 9IP PBX Software Version Tested 9EarthLink Open Issues & Non-Supported Features 9ShoreTel Open Issues & Non-Supported Features 9ShoreTel 14.2 Configuration for EarthLink SIP Trunking with Adtran CPE SIP Proxy 10Example of ShoreTel 14.2 SIP Trunk configuration 10EarthLink SIP Trunking Turn-up Testing Procedure 283Proprietary and Confidential – EarthLink Business

Implementation GuideDocument PurposeThe purpose of this document is to provide a detailed technical description and best practices forsuccessful implementation of the EarthLink SIP Trunking Product for the ShoreTel 14.2 with the AdtranCPE with SIP Proxy. This document provides information relative to the overall network topology as wellas definition and configuration standards for each device associated with the product. Also describedwithin this document are product guidelines and product limitations. This document is to serve asproduct reference and guide to EarthLink Customers.Product SummaryThe EarthLink Business SIP Trunking product is a complete VoIP (Voice over IP) solution based on the SIP(Session Initiation Protocol) signaling protocol. The SIP Protocol is responsible for set-up and tear-downof voice calls and overall feature and functionality. The SIP Trunking product can be offered as an overlayto several of EarthLink’s existing products such as Internet and MPLS based products. EarthLink Business’SIP Trunking solution will be served off a MetaSphere Call Feature Server (CFS) fronted by an Oracle SBC(Session Border Controller). The CFS acts as the centerpiece for call control and feature interaction. TheMetaSphere CFS Platform is a geo-redundant, high availability solution and serves as the primaryelement in EarthLink’s Hosted Voice and SIP Trunking Product families. The EarthLink Business SIPTrunking Product will primarily use Adtran CPE (Customer Premise Equipment) and will be configured asa SIP Proxy. The ShoreTel will be provisioned behind the SIP Proxy on the Adtran CPE with mediaanchoring provided by a ShoreGear virtual trunk switch. ShoreTel 14.2 requires at a minimum ESXi 5.0to operate a ShoreGear virtual trunk switch. In addition to the basic call control, advanced call routingfunctionality is available with EarthLink’s SIP Trunking product with MetaSphere Enhanced ApplicationServer (EAS) Platform which consists of multiple applications and servers integrated into high availabilitysolution. The Oracle SBC masks private to public IP Address space to provide a safe and secure means ofcommunication between the SIP Server and IP PBX. All SIP traffic destined to, or originating from theMetaSphere CFS, traverses through the Oracle SBC. The same policy relates to the CPE device installedat the customer premise. The Oracle SBC will resolve NAT (Network Address Translation) related issuesexposed when SIP traffic passes through a firewall.4Proprietary and Confidential – EarthLink Business

Implementation GuideNetwork Architecture and DesignThe EarthLink Business SIP Trunking solution consists of several key network elements that areconnected to the existing core routing infrastructure. The MetaSwitch Call Feature Server, IP/TDMGateways, and Oracle SBC’s are geographically diverse with reach-ability at both layer two and layerthree to provide failover capability and redundancy. Split-Horizon DNS servers are used to resolve theSIP domain to the appropriate regional SBC. Adtran CPE will be connected to the EarthLink network viathe traditional means such as Ethernet, PPP (Point to Point Protocol), or MLPPP (Multilink Point-to PointProtocol). T1, or bonded T1 services MUST be provisioned to either the Adtran TA5000 or directly to theCisco 7609 (Edge Router) to allow for proper QoS (Quality of Service) behavior. The first diagram belowprovides a high level look at the primary components that complete the SIP Trunking product. Thesecond diagram provides a detailed layout for the connections between the Adtran CPE and CustomersIP PBX.EarthLink Business Product CertificationSIP Trunking Network TopologyPSTNCisco P.E.Adtran CPECustomerEthernet SwitchT1/EEth 0/1SIPthernEth 0/2SIPSIPetSIPEarthLinkVoIPNetworkSIPOracle SBCMetaSwitchApplication ServerSplit-HorizonDNS ServerVtrunk switch ESXI 5.5ShoreGear 90Title: EarthLink Business SIP Trunking Test Bed Network TopologyRev.01Date: 7/15/2014Drawing by: Mike MachnikFigure 1-EarthLink SIP Trunking-Network Topology5Proprietary and Confidential – EarthLink Business

Implementation GuideAdtran 900e/Rear-View2EarthLinkNetworkEarthLink T1 from Network to Adtran NETT1 0/1Adtran ETH 0/1 to Customers Ethernet 35791 11 31 51741 61 81 92122223G1G3CONSOLELINKS T AT/A C TPoE112246810121024G2G4Power over EthernetShoreGear 90Vtrunk Switch ESXI 5.5Figure 2-EarthLink SIP Trunking-Connections from Adtran CPE to IP PBX6Proprietary and Confidential – EarthLink Business

Implementation GuideMedia Attributes and Codec NegotiationCodec SupportA voice codec (coder/decoder) is a hardware/software module/algorithm that takes an analog or digitalvoice stream and encodes it into an IP packet. For the EarthLink Business SIP Trunking Product, wecurrently support two (2) of the most common codec’s utilized in the continental United States, G.711uand G.729a. The preferred codec offered by EarthLink in the default configuration model is G.729a, thenG.711u. Basically this means that the call will negotiate using the G.729a codec first, as long as theterminating end sends G.729a as the first or primary offered codec. The paragraphs below provide moredetailed information related to the codec’s and other requirements associated with proper negotiationof the media/RTP.G.711uG.711u is the most common uncompressed audio codec deployed in the US. Because it isuncompressed, it supports the highest level of quality for the call. Typically the G.711u consumes90Kbps-100Kbps per call. The standard sampling rate of 8kHz is used for the G.711u codec.G.729aG.729a is the most common codec utilized to support compressed audio utilized in the US. Because it iscompressed, it is perceived to have a lower voice quality than that of G.711u, however most peoplewould never be able to tell the difference. Typically the G.729 consumes 30Kbps-40Kbps per call. Thestandard sampling rate of 8kHz is used for the G.729a codec.Packetization TimePacketization Time determines how often the audio stream is sampled and how often an IP packet iscreated. The standard packetization times are 10ms, 20ms, 30ms, and 40ms. EarthLink MediaGateway’s have been statically configured to use a 20ms packetization time. IP Phones and/or VoiceApplications will need to configure their equipment for a 20ms packetization time before audio trafficcan be reliably passed across the EarthLink IP Voice network.DTMF SupportEarthLink supports the transmission of Dual-Tone Multi-frequency (DTMF) digits through theimplementation of RFC2833. This RFC covers the basis of including DTMF digits within the media/RTPpath of the call. EarthLink recommends for Customers to configure their IP PBX’s and/or VoiceApplications to use RFC2833 to allow for DTMF to be passed properly and detected across the EarthLinkIP Voice network.7Proprietary and Confidential – EarthLink Business

Implementation GuideFax and Modem Support RequirementsCurrently, analog devices such as faxes and modems MUST be provisioned using the G.711u codec only.“SIP” to analog lines are supported as SIP Lines off the Adtran FXS Ports or a Cisco 2102 ATA (AnalogTerminal Adapter). The customer may also configure the IP PBX to use analog extensions for faxes andmodems. This method can be supported utilizing the G.711u codec only. T.38 is currently not supported.North American Numbering Plan FormatCurrently, the EarthLink Business Hosted Voice product only supports the North American NumberingPlan Format. A Global Numbering Plan Format, such as E.164, is currently not supported.Quality of Service PolicyTo ensure the best possible voice quality, EarthLink will mark and match all VoIP traffic related to SIP(Session Initiation Protocol) and RTP (Real-Time Transport Protocol). EarthLink VoIP and/or Real-Timebased appliances and applications are configured to use DSCP (Differentiated Services Code Point) “46”for all signaling traffic (SIP) and DSCP “46” for all Real-Time traffic (RTP) for Layer three priority. TheCustomers IP PBX MUST also be configured to use DSCP “46” to provide prioritization for SIP and RTP.Marking the DSCP field in the IP packet header will allow for packet classification to be matched andprovide priority across EarthLink’s network. This also ensures QoS specifications outlined in SLA (ServiceLevel Agreements) can be sufficiently met between EarthLink and the customer.8Proprietary and Confidential – EarthLink Business

Implementation GuideEarthLink SIP Trunking to IP PBX InteroperabilitySIP Trunking interoperability testing was performed between EarthLink and the IP PBX. All phases of thetest plan were executed against the actual configuration used in a customer deployment. Theinformation below provides the Adtran and IP PBX software versions tested as well as an issue summaryand non-supported elements discovered during compliance testing in the EarthLink Lab.Adtran Software Version Tested Adtran TA908e version R10.3.2IP PBX Software Version Tested ShoreTel 14.2 VM ESXi 5.5EarthLink Open Issues & Non-Supported Features Registration is currently not supported for the EarthLink SIP Trunking Product.T38 faxing is not currently supported.ShoreTel Open Issues & Non-Supported Features G.711 only is supported. G.729 results in one way audio after call is placed on Hold. Hence G.729 isnot supported. In some call flow scenarios, on hold music will not be played by the ShoreTel ShoreTel does not support Hold RFC 2543 REFER is not supported. Media is anchored on the ShoreGear virtual trunk switch when calls aretransferred off the ShoreTel. Inband DTMF is not supported.9Proprietary and Confidential – EarthLink Business

Implementation GuideShoreTel 14.2 Configuration for EarthLink SIP Trunking with Adtran CPE SIP ProxyExample of ShoreTel 14.2 SIP Trunk configurationSIP Trunk configuration:10Proprietary and Confidential – EarthLink Business

Implementation Guide11Proprietary and Confidential – EarthLink Business

Implementation GuideIndividual Trunks:12Proprietary and Confidential – EarthLink Business

Implementation GuideIndividual Trunk Example:13Proprietary and Confidential – EarthLink Business

Implementation GuideSIP Profile:14Proprietary and Confidential – EarthLink Business

Implementation GuidePrimary Voice Switches:15Proprietary and Confidential – EarthLink Business

Implementation GuideShoreGear 90:16Proprietary and Confidential – EarthLink Business

Implementation Guide17Proprietary and Confidential – EarthLink Business

Implementation GuideShoreGear Virtual Trunk Switch:18Proprietary and Confidential – EarthLink Business

Implementation GuideCall Control Options:19Proprietary and Confidential – EarthLink Business

Implementation GuideCodec Lists:20Proprietary and Confidential – EarthLink Business