QoE Assurance Division Solutions for ToIP – VoIP service assurance and service performance

Problems to solve  Telephony and voice over IP solutions are launched as enterprises are migrating their PABX to IP based PBXs  IP VPNs or core IP networks are being stressed with more and more VoIP traffic  Serious issues may happened as IP networks have not being designed for such real time traffic  Carriers/SPs are trying to solve the issues by deploying QOS in their networks  Symmetricom VoIP/ToIP solution helps SPs, enterprises to assess and monitor the quality of the network (IP SLAs) as well as verifying the service availability

Symmetricom solution benefits  Independent and integrated network performance monitoring and service performance monitoring solution for:  Assessing network performance before deployment, verifying IP QoS (Quality Of Services) and COS (Class Of Traffic) performances by stressing WAN links or IP backbone by – Injecting RTP traffic with different TOS/DiffServ settings in order to monitor performance improvements or lack of performances and issues diagnosis – Monitoring critical KPIs (Key Performance Indicators) such as OWD (one way delay), PDV (packet delay variation), PL (packet Loss) as required for carrying voice traffic over IP as defined in ITU Y1540/41 and IETF RFC 2330  Monitoring IP SLSs for IP VPN service providers by monitoring above KPIs  Monitoring VoIP traffic (monitor and score customer traffic – voice calls) for tracking VoIP usage and performances  Stimulating SIP signaling of hosted IPBX or IP-Centrex and score service performance and service availability

Active SIP testing Part 1

Solution main features  Q-xxx network probe acts as both SIP UAS and SIP UAC  Multiple UAS per Q-xxx (simulates an end user)  Supported codecs include: G.711a, G.711u, G.729 and G.723 with audio (MOS) scoring using ITU G.107 model  SIP supported transport layers: UDP or TCP  Supported SIP commands:  REGISTER (with time out) – several SIP servers supported  INVITE and RE-INVITE  TRANSFERT  BYE  Encryption: MD5 digest  Support TOS value in RTP packets when SIP test runs (see part 2)  Easy test setup using Excel spreadsheets or XML templates

Monitoring REGISTER Backbone NetworkMain Office Register Invite MOS BYE Response Code IPBX, SIP Proxy/register Monitoring Quality Monitoring PSTN Remote Office MOS (passive) Proxy Server Register Invite MOS BYE Response Code Network Probes Network Probes REGISTER A Q-101 probe can be used to simulate end user calls and monitor IPBXs as well all Registrar proxy

Monitoring call performances Backbone NetworkMain Office Register Invite MOS BYE Response Code IPBX, SIP Proxy/register Monitoring Quality Monitoring Remote Office MOS (passive) Proxy Server Register Invite MOS BYE Response Code Network Probes Network Probes INVITE PSTN Once a Q-101 probe has been successfully register, according to the test template, the probe can simulate user calls and traffic and monitor the signaling network as well as the data network and their performances

Rating voice quality Backbone NetworkMain Office Register Invite MOS BYE Response Code IPBX, SIP Proxy/register Monitoring Quality Monitoring Remote Office MOS (passive) Proxy Server Register Invite MOS BYE Response Code Network Probes Network Probes MOS PSTN Using ITU G107 MOS standard, voice quality is rated (active test between probes or passive )

OSS integration Backbone NetworkMain Office Register Invite MOS BYE Response Code IPBX, SIP Proxy/register Monitoring Quality Monitoring Remote Office MOS (passive) Proxy Server Register Invite MOS BYE Response Code Network Probes Network Probes BYE Report SNMP TRAP/ ALARMS PSTN KPIs are monitored as well as cause of failure, alarms or SNMP traps can be used to alert network administrator – SLS can be setup per codec type (up to 16 SLS) OSS integration

24/7 Service Monitoring Provide statistics per location (probe) 02 January 2007 SIP Servers Provide statistics per server or per location (probe)

NOC dashboards  Real time monitoring per probe or location  Support unlimited number of SIP servers

Per Server, Per Call Diagnostics  Per SIP server diagnostics, per cause of failure  Per call diagnostics

Alarms and Errors  Alarms and SNMP traps are generated when an error condition occurs:  INVITE failure condition  REGISTER failure condition  RTP Call Session failure condition  Reported error code  MOS value below threshold  KPIs monitoring

Test Setup – Excel or HTML  SIP server instantiation  UAS/UAC call list  UAS/UAC definition

Active RTP monitoring Part 2

VoIP backbone  In order to assure voice quality, IP backbone monitoring is required as defined in ITU Y1540 and Y1541  KPIs that must be monitored and matched against performance indicators are:  OWD  PDV  PL  Solution must also test DiffServ/TOS settings in order to monitor specific COS (Class Of Services)

Site A Site B Site C Site B Site A Hosted services RTP codec, TOS,. Network Probes Monitoring RTP backbone RTP SLS, RTP Performance (Delay, Jitter, Loss) TOS 1 TOS 2 OSS integration

SLS and Alarms monitoring

RTP KPIs monitoring dashboard  PDV monitoring  PL monitoring  Delay monitoring

Scheduling and reporting  Test scheduling Reports scheduling (RTP only) are defined through templates and forwarded as pdf to a list of

A VoIP lifecycle solution  For deployment/pre deployment  Assess Network Performance per ITU Y1540/41  Assess Network Quality Of Service for real time VoIP traffic readiness  Accelerate deployments Diagnostics/Troubleshooting  VoIP network troubleshooting (dissociate issues coming from the network and issues coming from appliances such as NAT devices, proxy,..)  Codec and network QoS mismatch (diagnose impacts of network COS on various type of codec)  For operations  Monitor VoIP service availability and service performance  Monitor service levels of actual VoIP calls  Hosted services VoIP KPIs monitoring  IP Centrex service monitoring  Voice backbone monitoring

Assure EnableAccelerate Conclusions Assess infrastructure and Network Quality Of Service for real time VoIP traffic readiness. Enable new service deployment - Hosted services VoIP, IP Centrex Assure service availability and service performance