august 3-4, 2004 san jose, ca designing applications using dsp modules etai bilawer director,...

August 3-4, 2004 • San Jose, CA • www.voipdeveloper.com

Designing Applications Using DSP Modules

Etai BilawerDirector, National Support

AudioCodes [email protected]


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


Chip SolutionsWhat 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


DSP Modules Solutions

What is out there?• DSP ‘farms’, Dedicated VoIP cardsAdvantages:• 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

productsDisadvantages:• Larger ‘foot-print’• Less control over the VoIP part• Needs some level of integration


DSP BoardsWhat 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


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+$


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…


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


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


Typical Hardware Layout

Base Board

TD

M In

terfaceA

nalo

g T

1/E1/T

3/OC

3

Ethernet

Utopia

HostProcessor

PCI/Parallel

DS

PM

od

ule

DS

PM

od

ule

DS

PM

od

ule

Time SlotAssigner


Typical Software Layout

User’s Application

API

PCI

DSP Module

SIP/H.323/MGCP/MEGACO

Parallel UDP TCP ATMRTP/RTCP


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


THANK YOU!

Come see us at booth #103

august 3-4, 2004 san jose, ca designing applications using dsp modules etai bilawer director,...

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