January 23-26, 2007• Ft. Lauderdale, Florida

Preparing Your Network for an IP PBX

TMCU-201-1

Warren SonnenDirector of Product Management

Epygi Technologies Ltd.warren.sonnen@epygi.com

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 SwitchLayer 2 Switch

PCPC PCPC PCPC PCPC

January 23-26, 2007• Ft. Lauderdale, Florida

The Basicscont.

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

PCPC PCPC PCPC PCPC

RouterRouter

Layer 2 SwitchLayer 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!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 Criticalor

Mission Impossible?

Warren SonnenDirector of Product Management

Epygi Technologies Ltd.warren.sonnen@epygi.com