Table of Contents
DTMF & Universal User Key Input
DTMF Origins - The Fortuitous Mistake
DTMF Origins - The Fortuitous Mistake
DTMF Usage Today
DTMF - Is it Network or Application Signaling?
Address Signaling in a Packet Network
The Universal User Input Problem
Questions
Current DTMF/SIP Transport Proposals
User Input Signaling in a Packet Network
Requirements for User Key Input Mechanism
Requirements for User Key Input Mechanism
Requirements for User Key Input Mechanism
What are the Choices for User Input?
SIP Info Method
SIP Info Method for User Key Input
RTP “Telephone Event” Payload
RTP “Telephone Event” Payload for User Key Input
RTP “Telephone Event” Payload
RTP “Telephone Event” Payload
The Problem
The Problem
The Solution
Issues
Issues
Conclusions
Conclusions
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