January 23-26, 2007 Ft. Lauderdale, Florida Preparing Your Network for an IP PBX TMCU Warren Sonnen Director of Product Management Epygi Technologies Ltd.

January 23-26, 2007 Ft. Lauderdale, Florida Agenda The Basics Discovery & Assessment Is The Network Ready? Installation What Next?

January 23-26, 2007 Ft. Lauderdale, Florida The Basics Real-Time Protocol (RTP) Latency Jitter Packet Loss Echo Quality of Service (QOS) Mean Opinion Score (MOS) – 1.0 – 5.0 Quality of Experience (QOE) Layer 2 Switch PCPCPCPC

January 23-26, 2007 Ft. Lauderdale, Florida The Basics cont. Local Area Network (LAN) Wide Area Network (WAN) Virtual LAN (VLAN / IEEE 802.1Q) Differentiated Services Code Points (DiffServ) Type of Service (TOS) IEEE 802.1p PCPCPCPC Router Layer 2 Switch VLAN BVLAN A

January 23-26, 2007 Ft. Lauderdale, Florida Discovery & Assessment Network Topology Current hardware elements IP addressing scheme Large-scale data applications Service level agreement (SLA) Assessment Voice traffic simulation Metric translation Duplex mismatch Stress the network

January 23-26, 2007 Ft. Lauderdale, Florida Discovery & Assessment cont. Delay should be under 150 milliseconds Jitter buffers can resolve mild jitter - 20 to 40 ms buffer Packet Loss should not be less than 1% Mean Opinion Score (MOS) between 3.5 and 4.1 is desired LAN Voice traffic simulation Type of current traffic Traffic flows Link speeds Current network stress WAN Internet Service Provider (ISP) type Current usage Backbone congestion Bursting Link type

January 23-26, 2007 Ft. Lauderdale, Florida Is The Network Ready? Review the baseline assessment Have all “The Basics” been addressed? HUBS vs. Managed Switches Application level gateway (ALG) firewall Make appropriate changes Codec decision

January 23-26, 2007 Ft. Lauderdale, Florida Is The Network Ready? cont. Test it again! Was there an improvement? Did the anomaly resurface? Did the final simulation mimic estimated traffic activity? Security

January 23-26, 2007 Ft. Lauderdale, Florida Installation Good Luck! Successful Deployment vs. Unsuccessful Deployment Unknown environment End-user driven install On-site setup First time install Informed installer Installation plan Pre-staging Qualified/Trained

January 23-26, 2007 Ft. Lauderdale, Florida What Next? How important should VoIP be to the customer? The number ONE critical application How can I ensure my VoIP stays #1? Periodic health checks Client PC health – Virus, Worms, SPAM, and Spyware Plan new application deployments

January 23-26, 2007 Ft. Lauderdale, Florida What Next? cont. Is this all free? Outsourcing this activity Managed service revenue Maintenance revenue Network assessment and diagnostic fees

January 23-26, 2007 Ft. Lauderdale, Florida Mission Critical or Mission Impossible? Warren Sonnen Director of Product Management Epygi Technologies Ltd.