VoIP enabling legacy products David Duffett, Aculab.
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Transcript of 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
