Transcript slides

Murali Aravamudan
Head, Communication Software Research Department
Bell Labs Innovations, Lucent Technologies
600 Mountain Ave, Rm# 2A-208
Murray Hill, NJ 07974
(908) 582-5499
[email protected]
Why Internet Telephony?
• IP Economics
– Crowe’s law (exponential cost reduction in transporting
a bit per mile) coupled with Moore’s law
• New access arrangements (cable, xDSL) enable new (IP)
devices
• New signaling services (not limited to Intelligent Network
services such as call forwarding, reach me etc.)
• New media services (not limited to 3 KHz voice)
What can we do today?
• IP Phone to IP Phone
– PC and other form factors (netmeeting, vocaltec, selsius etc.)
• IP Phone to PSTN Phone
– CTI based IP Telephony hop off gateways
• PSTN Phone to IP/PSTN Phone (two stage dialing)
– morphed RAS devices
• Seamless PSTN to PSTN Phone (SS7 integration)
– SS7 trunk access and IP backbone (basis for NextGen telcos)
Issues
• Technical
– standardization of Media Gateway Control Protocols (IPDC, SGCP
etc.)
– the (stillborn) H.323 gatekeeper
– need guarantees? (delay, jitter etc.)
– service creation environment in the NextGen Telco (it is not just
open APIs, and protocols)
• Regulatory
– unbundled copper for new access arrangements
– cookie cutter process for becoming a NextGen Inter Exchange
Carrier
What will happen in the next three years?
• Seamless PSTN to PSTN Phone (SS7 integration)
– NextGen Telcos (IXCs) deploying fiber networks optimized for IP
– Internet Telephony will hit mass market without the mass knowing
it (VoIP is transparently used by Tandem arrangements in IXCs)
– SS7 trunk access and IP backbone
• Inband advanced intelligent network services will be done
using servers in the IP network instead of circuit adjuncts
(read: slow death of Voice on ATM)
• Integrated access services for small/mid size business will
increase demand for native IP phones/PBXs
– IP Phones (that are affordable) will happen
– new media services as part of telephony