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IP Multimedia Subsystems
Home bullet PES Industries bullet Telecom bullet IP Multimedia Subsystems bullet Focus Areas

Focus Areas
IP Multimedia Subsystem, more popularly known as IMS can be broken down into three broad layers:

  • Application layer - Bringing in the NG applications using application server / service delivery platform
  • Service control layer - Doing the main packet switching, controlling the call session and media flow using the HSS database
  • Transport layer - Providing the clients the Quality of Service (QoS) required for MM delivery

IMS Focus Areas

Service Delivery
  • AS platforms - SIP, Parlay
  • Full service orchestration and delivery
  • Integrated charging framework
IMS Clients
  • Client application framework for multimedia applications
  • Low footprint SIP stack
  • Integrated IPSec client
  • Integrated HW and SW design and development
Service Control Infrastructure
  • SIP- based call service control functions
  • Media / signaling gateways
  • AAA
  • HSS and diameter based interfaces
  • PSTN inter-working
Modular Communication Platform
  • ATCA / carrier grade Linux
  • High availability (SAF)
  • Management using IPMI, SNMP
Transport Infrastructure
  • Wireline and wireless access technologies
  • IP QoS - Diffserv, RSVP-TE
  • Admission control - IP filters, flow policing
  • NAT handling
  • IPSec and key exchange
  • Policy - based networking
  • IPv6
  • Media delivery - RTP / RTSP
Service and Network Management
  • Extracting management parameters from IMS service / transport / application elements
  • Provisioning applications
  • NGOSS contract adaptations
  • SLA handling - Translation to network QoS parameters and monitoring

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