Voice over IP Fundamentals

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Voice over IP Fundamentals

• CHAPTER 14
• PSTN and VoIP Interworking

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• Cisco Packet Telephony
• Connection Control
• Call Control
• Services

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• Cisco Packet Telephony
• Connection Control
• Functionally sets up, maintains and tears down
  the call
• Uses AS5850, MGX 8850, 2600, 3600, and 3810
• Communicates with the Call Control Plane via
  Media Gateway Control Protocol (MGCP)

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• Cisco Packet Telephony
• Call Control
• Functionally signals, processes and route voice
  calls
• Uses Signaling System Seven (SS7)
• Processes include digit analysis and
  manipulation, route selection, hunting, and
  switch-based features
• Interfaces with external logic programs
• Uses or can use MGCP, SIP, H.323, and MEGACO
• Call Control plane is unknowing of the VoIP
  system and is there for transport
• Can interact with IP, , ATM, Frame-relay.

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• Cisco Packet Telephony
• Service Plane
• Logic that provides enhanced services
• Number translation
• Account code authentication
• Credit card validation
• Virtual Private Network (VPN)

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• Cisco Packet Telephony
• Packet Voice Network
• Packet Voice Interexchange Carrier (IXC) tandem
  applications
• Packet Voice Local Exchange Carrier (LEC) Class 4
  relief applications
• Endpoint client multimedia applications
• Corporate voice on-net and off-net services
• VoIP local/end office applications on cable
  infrastructure

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• Cisco Packet Telephony
• Network Elements
• Call Agent (PGW2200)
• MG
• Service Control Point
• Service Node
• Cable headend
• Residential Gateway
• H.323/SIP endpoint/client

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• Cisco Packet Telephony
• Call Agent (PGW2200)
• Cisco Media Gateway Controller (MGC) software,
  running on Sun Microsystems general computing
  platforms
• Cisco Signaling Link Terminals (SLT)
• LAN switch for IP interconnectivity of Cisco
  PGW2200 elements
• (optional) H.323 Signaling Interface (HIS)
  adjunct processor
• (optional) Management products, including the
  Cisco MGC Node Manager, Cisco Voice Services
  Provisioning Tool (VSPT), and Cisco Billing and
  Management Server (BAMS)

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• Cisco Packet Telephony
• Call Agent (PGW2200) Gateway Applications
• VoIP Transit
• Primary Rate Interface (PRI) Grooming and TDM
  offload
• SIP PSTN gateway
• H.323 PSTN gateway

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• Cisco Packet Telephony
• Call Agent (PGW2200) Core Capabilities
• Call-Signal processing
• Address resolution, call routing, resource
  management, connection control, and call detail
  record (CDR) generation
• Service Access Functions
• Management Interfaces

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• Cisco Packet Telephony
• MG
• Physical T1/E1 facility termination
• Echo Cancelation
• Balance of Jitter buffers
• Voice Activity Detection (VAD)
• Voice compression using, G.711, G.723, G.729 and
  others
• Tone Generation
• Dual-tone multifrequency (DTMF) transport
• U-law and a-law transcoding

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• Cisco Packet Telephony
• Service Control Point
• Provides an execution environment for service
  logic
• Transaction request (number translation)
• 800 Toll free service
• Local Number Policy

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• Cisco Packet Telephony
• Cable Headend
• Cable modem termination system
• Data-over-cable Service Interface Specifications
  (DOCSIS)

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• Cisco Packet Telephony
• Residential Gateway
• Provides POTS ports to the home
• Runs DOCSIS protocol
• Example DSL Modem

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• Cisco Packet Telephony
• H.323/SIP
• Wide range of voice/multimedia applications

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• Cisco Packet Telephony
• Network Interfaces
• Signaling Termination
• Inter-call agent signaling
• Connection control
• Services Control

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• Cisco Packet Telephony
• Signaling Termination
• SS7 Links
• Nonassociated signaling (A-links)
• Fully associated signaling (F-links)
• PRI Links
• CAS Signaling
• H.323

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• Cisco Packet Telephony
• Inter-PGW2200 Signaling
• Connection Control via MGCP
• Services Control

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• Cisco Packet Telephony
• PGW2200 Architecture
• Application toolkit
• Conversion Analyzer
• Simulator

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• Cisco Packet Telephony
• PGW2200
• Execution Environment
• North American Numbering Plan
• Route Analysis
• Digit Analysis
• Reroute on Congestion

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• Cisco Packet Telephony
• PGW2200 Route Selection

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• Cisco Packet Telephony
• PGW2200 Digit Analysis

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• Cisco Packet Telephony
• PGW2200 Implementation

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• Cisco Packet Telephony
• PGW2200 Implementation
• Application Check-Pointing
• MGC Node Manager
• Accounting

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• Cisco Packet Telephony
• PSTN Signaling Over IP
• SCTP
• IUA

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• Cisco Packet Telephony
• Changing Landscape of PSTN-IP Interworking

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• Cisco Packet Telephony
• Changing Landscape of PSTN-IP Interworking

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• Cisco Packet Telephony
• Session Border Controller (SBC)

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End of Chapter 14