1. Designing Applications Using DSP Modules
Etai Bilawer
Director, National Support
AudioCodes Inc.

2. 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

3. 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

4. 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

5. 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

6. Comparison CHIPS DSP MODULES BOARDS Time-to-market Long – 6-9 Month
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+$

7. DSP Module - Typical Applications
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…

8. 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

9. 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

10. Typical Hardware Layout
Host
Processor
PCI/Parallel
Base Board
Analog T1/E1/T3/OC3
TDM Interface
Time Slot
Assigner
Ethernet
Utopia
Module
DSP
Module
DSP
Module
DSP

11. Typical Software Layout
User’s Application
API
SIP/H.323/MGCP/
MEGACO
PCI
Parallel
UDP
TCP
ATM
RTP/
RTCP
DSP Module

12. 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

13. THANK YOU!
Come see us at booth #103