VoIP enabling legacy products David Duffett, Aculab.

VoIP enabling legacy products

David Duffett, Aculab

Our agenda

Defining the challenge Gateways; principles and practice Pitfalls to avoid Implementation advice

My job for the next few minutes

Keep you awake and engaged! Maintain non-commercialism Raise the right questions to enable you to

make the best choices when VoIP enabling your legacy equipment

But first…

VoIP: where are we now?

Time

Expectations

Hype

Adoption

Scepticism

Defining the challenge

PSTNPrimary rate link

IP network

VoIP

Gateways

Used to connect dissimilar interfaces

Circuitswitched

equipment

Packetswitchednetwork Gateway

A – law – law

G.711G.723.1G.729 (A+B)

Q.931TDM

SIPRTP

Packetswitchednetwork

H.323RTP

Traditional gateway

Call control

Media

H.323SIP

RTP

T1 signalling

T1 bearers

Decomposed gateway

Mediagatewaycontroller

Mediagateway

H.323SIP

RTP

T1 signalling

T1 bearers

MediagatewayRTP T1 bearers

MediagatewayRTP T1 bearers

H.248/MEGACO/MGCP

Gateway: choices

H.323 or SIP or BOTH? Gatekeeper Registrar, proxy

T1, E1 or both protocols? Codecs Proprietary or open standards?

Gateway: considerations

Protocol capabilities Existing equipment Current network provider Potential solutions

Quality of Service IP network provider

Type of traffic Conferencing, ASR, SVI

Gateway: considerations

What other work might the solution do? Routing CLI/DDI authentication Number portability Address translation Billing information

Gateway used for routing

IP network

PSTN

Legacyinterface

PBXACD

Gateway

Gateway: buy or build?

Flexibility Cost Business objectives Skill levels

Gateway: buy or build?

Support requirements Protocol support ROI

Gateway

If your solution needs to be custom made be sure to use open standard components

Interoperability is key

Pitfalls to avoid

Don’t get intimidated by your existing: Equipment provider Network provider

Don’t be a CHEAP JERK! Buying the cheapest off the shelf option may

leave you in trouble• Reliability• Changes

Implementation advice

Think RESPONSIBILITIES You Network provider Equipment (component or solution) provider

Think FUTURE How will things change

• Protocols• Scaling

Implementation advice

Think SOLUTIONS Don’t be afraid to ask questions, and to question

the answers you get There is a rich supply of people to help you here

at the conference

Haben Sie

etwa Fragen? Cuestiones?Any questions?

Quel questionnes?

Haben Sie

etwa Fragen?Cuestiones?

Haben Sie

etwa Fragen?

Cuestiones?

Any questions?

Quel questionnes?Cuestiones?

Quel questionnes?

Any questions?

Summary

Defining the challenge Look at the precise functionality required

Gateways Choices and considerations

Pitfalls Don’t get hustled, and don’t be a cheap schmuck

Implementation advice THINK first, spend next

Thank you

David Duffettdavid.duffett@aculab.com

Stand no. 303