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3Com S200 Establishing a Call, Session and Connection Establishment, Introduction, Voice Over IP

Models: S200

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	About Voice over IP (VoIP)
Establishing a Call
Introduction
Introduction	This section describes call establishments. Figure 4 shows the packets exchanged for
	session and connection establishment and finally, voice transfer.

Voice Port	Source IP Node	Destination IP Node	Voice Port
ACP call request
	Open UDP channel
		TCP call request
Session Setup
		TCP Call accept
		SoTCP internal call request
Connection Setup		ACP call request
		ACP call accept
	SoTCP internal call accept
	ACP call accept
Data Transfer	Voice
		Voice
			Voice

Figure 4. Session and Connection Establishment

Voice Over IP

T0008-48/B

Revision 5.2

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3Com S200 Establishing a Call, Session and Connection Establishment, Introduction, About Voice over IP VoIP, Voice Over IP

Contents

3Com Corporation PathBuilder S200 Series Switch Voice Over IPRestricted Rights Legend Restricted Rights Notification for U.S. Government UsersNotice continued Proprietary MaterialPage Voice Over IP OverviewIntroduction In This ManualFeatures About Voice over IP VoIPFigure 1. Voice over IP Network Introduction Network TopologyFigure 2. Example Network Topology ConventionFigure 3. SoTCP Packet Format SoTCP OperationTransport MechanismFigure 4. Session and Connection Establishment Establishing a CallIntroduction About Voice over IP VoIPPacket Transferred StageDescription StageDescription continued StagePacket Transferred VoIP Applications Figure 6. VoIP Applications for Long Distance Telephone ServiceApplications Figure 5. VoIP Applications for Small Branch OfficesFigure 8. VoIP Configuration Example Example VoIP ConfigurationConfiguration StepConfiguration Figure 9. Configurable Parameters to support VoIPVoIP Applications Voice Over IPConfiguring VoIP Configuring VoIPIntroduction Voice Over IPSoTCP Parameters Figure 10. SoTCP ParametersDescriptions TCP Port Number Maximum Number SVCs per Session Maximum Number of TCP SessionsMaximum Total Voice SVCs Maximum Data SVCsSerial Connection Establishment Timeout TCP Connection Establishment or Clearing TimeoutTCP Keep Alive Timer Parameters Route Selection Table ParametersEntry Number AddressFigure 11. SoTCP Map Table Parameters SoTCP Map Table ParametersConfiguring VoIP Voice Over IPDestination IP Address Destination AddressThese SoTCP map table parameters should be configured ParametersStatistics Figure 12. Statistics ScreenIntroduction Example SoTCP StatisticsFigure 13. SoTCP Statistics DescriptionFigure 14. SoTCP Detailed Statistics SoTCP Detailed StatisticsExample DescriptionDescription continued Page Technical Support ServicesOnline Technical World Wide Web3ComFacts Automated Fax Service Access by Analog ModemAccess by Digital Modem Country3Com Support fromTelephone NumberCountry Fax NumberTelephone Number 3/26/98Numerics Index