Vovida Networks Business Plan

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Open Source SIP (Session Initiation Protocol)
Luan Dang - CTO Vovida Networks,
Inc ldang_at_vovida.com
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Presentation Topics

• SIP Architecture
• Mapping to SS7, PRI and CAS
• Vovida Networks Open Source SIP Stack
• Protocol Traction Status
• SIP Others
• Download Site
• SIP Others
• Next Steps

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SIP Architecture
Vovida Networks classXswitch
Residential GW
MGCP
H.323
MGCP
H.323
MGCP
Analog
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Flow Diagrams

• Basic Incoming Call CAS
• Basic Incoming Call PRI
• Basic Incoming Call SS7
• Tandem Call CAS
• Tandem Call PRI
• Tandem Call SS7

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Basic Incoming Call CAS
CO
CAS Trunk
SIP Phone
Ringback
Ring
Off Hook
Speech
On Hook
Return Unseize
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Basic Incoming Call PRI gt SIP
CO
PRI Trunk
SIP Phone
Ringback
Ring
Off Hook
Speech
On Hook
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Basic Incoming Call SS7
CO
VSC
SIP Phone
Ring
Ringback
Off Hook
Speech
Speech
On Hook
8
Tandem Call CAS
CO
CAS Trunk
SIP Trunk
Ringback
Ringback
Off Hook
Speech
Speech
On Hook
Return Unseize
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Tandem Call PRI
CO
PRI Trunk
SIP Trunk
Ringback
Ringback
Off Hook
Speech
Speech
On Hook
Release
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Tandem Call SS7
CO
SS7 Trunk
SIP Proxy
Ringback
Ringback
Off Hook
Speech
Speech
On Hook
RLC
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Open Source SIP

• GNU LGPL License
• Linux OS, C source
• Blocking and non blocking communication models
• Memory management via reference counting
• Retransmission timers

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Benchmarks

• Executable
• 350K SIP encoder/decoder
• Performance
• 1500 SIP messages/sec
• Pentium II (400 MHz)

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Protocol Traction Status
Open Source MGCP

• 2,567 Downloads (since 6/30)

Open Source RTP

• 1,462 Downloads (since 6/30)

Open Source H.323

• 1,065 Downloads (since 7/29)

Open Source SIP

• 667 Downloads (since 8/31)

Download figures as of 9/26/99
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Download Site

• http//www.vovida.com/content.cfm?pagenameopensou
  rce
• SIP
• MGCP
• RTP
• H.323

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Next Steps
SIP in IETF and ISC

• Working to Further Refine the Standard

Open Source SIP

• Add New Extensions to Broaden Capability

Porting

• Enhance Usability of Existing Stacks Across
  Multiple Platforms Environments

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Contact Info

• Luan Dang - CTO
• Vovida Networks
• www.vovida.com
• email ldang_at_vovida.com
• TAC on the ISC
• www.softswitch.org

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The Communications OS of the Internet