KT%20Internet%20Call%20Waiting%20Service - PowerPoint PPT Presentation

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KT%20Internet%20Call%20Waiting%20Service

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Extension of PINT Protocol. Pros and Cons. Further ... Extension of PINT Protocol. REGISTER - registers/unregisters the internet on-line status to PSTN ... – PowerPoint PPT presentation

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Title: KT%20Internet%20Call%20Waiting%20Service


1
KT Internet Call Waiting Service
  • lt draft-rhim-spirits-kticw-00.txt gt
  • Sung Yurn, Rhim
  • IN Research Team
  • Korea Telecom
  • syrhim_at_kt.co.kr

2
Contents
  • Service Features
  • Architecture
  • Architectural Features
  • Protocols
  • Extension of PINT Protocol
  • Pros and Cons
  • Further Challenges

3
Service Features
  • Internet On-line Trigerring
  • Incoming Call Notification
  • - Calling Party Number/Name/Time Identification
  • Incoming Call Handling
  • - Accept/Reject/Forward to Another/Forward to VMS
  • - Call Processing on No Response
  • - Automatic Call Disposition
  • Call Logging
  • Automatic/Manual Service Activation/Deactivation
  • ICW Client Configuration

4
Architecture
Internet
PSTN
SCP
ICW Proxy
ICW SL
ICW UAC/UAS
ICW Server System
firewall
SCF /SDF
SCGF
PINT
firewall
INAP
IP
SSP
PINT
SRF
SSF /CCF
ICW UAC/UAS
LEX
CCF
ICW Client System ICW Subscriber (callee)
SL Service Logic UAS User Agent Server UAC
User Agent Client INAP Intelligent Network
Application Protocol PINT PSTN/IN Interworking
Protocol
PINT Protocol SCP Internal Protocol INAP Protocol
5
Architectural Features
  • SCGF on SCP
  • - has protocol interworking function
  • ICW Server System
  • - has proxy server function for message routing
  • - has management function for the ICW Clients
    connected to it
  • ICW Client Application on subscribers PC
  • - monitors and notifies internet connection
    status to the SCP
  • - disconnects the modem connection to accept the
    incoming call
  • - has service profile with automatic call
    processing info.

6
Protocols
PINT Proxy
PINT UAS
PINT UAC
PINT UAC
PINT UAS
SSP
PINT 1.0
PINT 1.0
ICW Server System
ICW Client System
SCP
INAP CS-1
IP
REGISTER
INVITE
  • KT INAP 1.0
  • based on ITU-T INAP CS-1
  • Added two CS-2 INAP messages(PRM, EM)
  • PINT 1.0
  • PINT Service Protocol by IETF PINT WG
  • Based on SIP 2.0 and SDP

7
Extension of PINT Protocol
  • REGISTER
  • - registers/unregisters the internet on-line
    status to PSTN
  • - shows the liveness of the client/internet
    connection
  • Bye
  • - conveys the Call Processing Result from PSTN
  • Responses to INVITE
  • - 100 Trying Trying
  • - 200 OK Accept the Call
  • - 303 See Other Forward the Call to Another
    Number
  • - 380 Alternative Service Forward the Call to
    VMS
  • - 603 Decline Reject the Call

8
Pros and Cons
  • IAP Independent
  • -gt No pre-arrangement between IAP and SP
  • Supplementary Service of TMS
  • -gt increase the call completion rate for busy
    subscriber
  • -gt dedicated to the subscribers telephone
    number
  • -gt not support subscribers mobility
  • Accept the Call via PSTN not VoIP
  • -gt Automatic Modem Disconnection Feature

9
Further Challenges
  • Virtual Second Line Feature
  • -gt accept the call via VoIP
  • Extend the ICW Service to general messaging
    service such as UMS, community services, etc.
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