Converged Services

1
Converged Services

• Igor Faynberg (faynberg_at_lucent.com)
• Hui-Lan Lu (huilanlu_at_lucent.com)
• Bell Labs, Lucent Technologies
• Workshop on IP-Networking and MEDIACOM 2004,
  Geneva

2
Outline

• What do we mean by convergence?
• Adjusting the PSTN to the Internet
• Access to the Internet over the PSTN lines
• Internet off-load
• Adjusting the Internet to the PSTN
• IP telephony
• PINT
• SPIRITS
• Unified Messaging
• Voice Access to the Web
• Porting of PSTN intelligence into the IP
  telephony world (SIN)
• VPN
• Conclusion

3
Three Aspects of Convergence

• 1) Interworking of traditional PSTN with the IP
  infrastructure to support voice over IP
• 2) Interworking of PSTN with the IP
  infrastructure to deliver IP-based service
  control for traditional PSTN calls (i.e., IP
  Telephony without voice over IP)
• 3) Interworking of PSTN with the IP
  infrastructure to provide remote access to IP
  networks via PSTN lines

4
Adjusting the PSTN to the Internet

• (PSTN access to IP networks)
• Exploiting the bandwidth that can be supported by
  two-wire telephone access lines
• Pulse Code Modulation (PCM) modem
• Digital Subscribers Line (DSL)
• Offloading Internet traffic from the PSTN

5
PSTN Congestion due to Internet Traffic
PSTN
Internet User
IngressSwitch
EgressSwitch
Remote Access Server
congestion
6
An Internet Offload Solution
IngressSwitch
PSTN
Internet User
EgressSwitch
Softswitch
Remote Access Server
7
Adjusting the Internet to the PSTN (two aspects)

• 1) Support of the IP telephony requirements
• A new IP endpoint--IP telephony gateway--is
  required to interconnect the Internet and the
  PSTN
• QoS must be enforced
• The IP and PSTN naming and addressing schemes
  must interwork
• 2) The Internet-based support of the PSTN
  services requirement
• Keep the intelligence at the edges! (Or, at
  least, share it with the edges)

8
PC-to-PC (1)
PSTN as an access vehicle
9
PC-to-PC (2)
PSTN as the backbone transport
10
Phone-to-PC or vice versa
IP Network
PSTN
11
Phone-to-phone
Home
IP trunking
IP Network
PSTN
Enterprise
12
Why IP telephony?

• Toll bypass avoids long-distance call charges.
• One type of networks for both voice and data
  simplifies network operation, administration, and
  management.
• Easy integration with other IP applications
  promises richer than ever telephony services.

13
Converged IP Telephony Architecture
IVR System
Public Switched Telephone Network
SS7
voice
Media Gateway
H.248
H.323 Terminal
SIP User Agent
voice
SIP/H.323
SIP User Agent
SIP Server Cloud
H.323 Terminal
IP Network
14
PSTN/Internet Interworking (PINT)
PINT Client
PINT Gateway
SIP
SCP
Internet
Requests
Internet Enhancing PSTN Call Control
15
PINT has successfully concluded, but There are
potential services for the future

• Multimedia conferencing
• Free calls (paid by advertisers)
• with the profiling feature
• Speed Call list provisioning
• Service Subscription
• Follow-me service provisioning
• Access to communications bills
• Account information changes
• VPN Provisioning

16
Services in the PSTN/IN Requesting InTernet
Services (SPIRITS)
SPIRITS Server
SPIRITS Gateway
Internet
SCP
Requests Notifications

• Internet Call Waiting
• Internet Caller ID

• Voice Mail arrival
• Phone Off-hook detection

Utilizing the Internet for PSTN Service
Notification
17
Joint PINT/SPIRITS Architecture
18
SPIRITS Status

• 1) The Implementation RFC (informational) RFC
  2995 has been published
• 2) The Architectural RFC candidate has undergone
  WG last call
• 3) The Requirements RFC candidate is in the
  process of consensus building
• 4) The protocol work is under way

19
Unified Messaging
The ability to create, send and retrieve any type
of messageanytime, anywhere with any
terminal...
20
Voice Access to the Web

• Residential
• Stock quotes
• Traffic conditions
• Web-based Yellow/White pages
• Local Events
• Personalized Web page services

Voice Service Logic on Web Servers
21
SIP/INAP Interworking (SIN)IETF Design Team
Switch
Intelligent Peripheral
IP Network
SIP
INAP
Service Control Point
PSTN
22
Virtual Private Network
PSTN
Enterprise IP Network Island
Enterprise IP Network Island
Internet
Tunnel Gateway
23
Conclusion

• Regardless of the economical success of the IP
  telephony, there is room for integration of the
  traditional telephony and Internet
• We consider convergence to be co-existence and
  symbiosis of the evolving PSTN and Internet (not
  the consumption of one by another) this
  symbiosis is manifested in integration
• Integration of pure IP telephony with the PSTN
  has been worked in the IETF enum and megaco WGs
  together with ITU-T SG 2 and SG 16, respectively.
• Intelligent Network is a natural PSTN platform to
  support such integration ITU-T SG 11 and IETF
  (pint, spirits) have had a productive cooperative
  effort to this end.
• The emphasis of the industry now is on enhanced
  services rather than pipes services are key
  differentiators
• RECOMMENDATION the standards organizations
  should concentrate on providing building blocks
  for developing services in converged networks