Transcript Designing Applications Using DSP Modules Etai Bilawer Director, National Support

Designing Applications Using
DSP Modules
Etai Bilawer
Director, National Support
AudioCodes Inc.
[email protected]
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
VoIP Solutions
Options:
• Chips– DSP’s, CPU’s, SoC, Chip-sets
• DSP Modules – DSP “Farms”, Application
specific modules
• Boards – PCI & cPCI boards
• “Systems” – Stand alone systems
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
Chip Solutions
What is out there?
- DSP, SoC, ‘Chip-Sets’, CPU, Network Processors
Advantages:
- Low priced ‘BOM’. 5$/Channel
- Custom designed Architecture
- Many choices – Varity of vendors and architectures
Disadvantages:
- Time to market
- Complexity and Risk involved in the design
- Higher levels of expertise required
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
DSP Modules Solutions
What is out there?
• DSP ‘farms’, Dedicated VoIP cards
Advantages:
• Faster ‘time-to-market’ than Chip based
• Provides a good mix of design flexibility while having a
higher level of integration
• Ready made VoIP that can be added to current designed
products
Disadvantages:
• Larger ‘foot-print’
• Less control over the VoIP part
• Needs some level of integration
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
DSP Boards
What is out there?
PCI, cPCI, ATCA
Advantages:
• Quick ‘time-to-market’
• Easy to implement and control
• Some are ready make MGW
Disadvantages:
• Restricted ‘Form Factors’
• Higher price/port
• Limited Flexibility and architecture
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
Comparison
CHIPS
Time-to-market
Long – 6-9 Month
DSP MODULES
BOARDS
Medium – 3-6 Month
Short – Less than 3
Month
Design
Flexibility
Very High – All
options and designs
are available
Medium-High – Allows
for a lot of architecture
flexibility with some
constrains
Low – Only system
level
Complexity &
Risk factors
High – A
component. A full
design needs to be
build around.
Medium – Known and
working segment that
needs some hardware
and software work
Low – Know and
working product that
needs to be controlled
Price/Port
5+$
12+$
35+$
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
DSP Module - Typical Applications
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•
•
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VoIP Phones
CPE/IAD
Media GW and Media Servers
DSLAM’s
Network devices – Adding VoIP
Legacy PBX and Switches adding VoIP
General TDM Solutions – IVR, Call
Centers…
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
Hardware and Specifications
• I/O Interfaces – PCM, PCI, Parallel,
Utopia, Ethernet…
• Control – Local, Remote
• MIPS – What does it mean? Does it really
matter?
• Power and cooling
• Footprint – standards such as PMC,
2xPMC, PC-104 or others
• Number of Channels
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
Software Requirements
• Control Protocol –
MGCP/MEGACO/SIP/H.323/Proprietery
• Field Proven and interoperability
• Features – IVR, HTTP streaming, VXML,T.38,
RFC2833, all Vocoders-G.723.1, G.729,
G.711…
• Host OS Support
• Software Package
• Debug tools
• Documentation
• Tech-Support
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
Typical Hardware Layout
PCI/Parallel
Host
Processor
Ethernet
DSP
Module
DSP
Module
DSP
Module
TDM Interface
Analog T1/E1/T3/OC3
Time Slot
Assigner
Utopia
Base Board
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
Typical Software Layout
User’s Application
API
PCI
Parallel
SIP/H.323/MGCP/
MEGACO
UDP
TCP
ATM
RTP/
RTCP
DSP Module
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
Conclusion
• VoIP Selection - Trade-off between Flexibility,
Risk &Complexity and time to market guides the
designer’s decision
• Pointers for choosing the right DSP Module:
– Vendor’s credibility, interoperability, experience = field
proven
– Feature richness
– Physical Interfaces
– Price Vs. Channel’s count
– Software Package and Tech-Support
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com
THANK YOU!
Come see us at booth #103
August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com