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to Reach the Next Billionto Reach the Next Billion

Daniel EnnsDaniel Enns

Senior Vice PresidentSenior Vice President

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Agenda

Cellular backhaul Market

Challenges

Opportunities

cellular backhaul

Comtech EF Datas VSAT

so ut on

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Traffic Growth is Faster Than.

3Source: Unstrung Insider

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Cellular Network Hierarchical Structure

70% OPEXg a

Abis interface

MSC

Core

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Current Challenges

s nee en anc ng

Revenue per voice minute decreasing not the

Next growth in rural areas with lower ARPUs and

lower revenue per minute due to low populationdensity and higher CAPEX

More competition

5Source: GSMA Latin America

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Cellular Subscriber Growth

.

phones Implementing solut ions to enable mobile

usage for populations residing in rural/remote

locations is a significant challenge

Mobile operators in Africa, Middle East, Latin

America and Asia are using satellite space

cell sites and the networks Mobile Switching

Center

Total number of cellular sites backhauled b

satelli te is predicted to grow to 35,000+ sitesglobally by end of 2010 (CAGR = 28%)

6Sources:

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Universal Service Obligation

Regulations to enable universal access to mobile services &

broadband connectivity to people in rural and remote areas

Most countries have a Universal Service Fund that levycontributions from mobile and f ixed operators to subsidize

Satellite will be a key enabler to delivering services

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Indonesia

6th

largest country in the world in terms of mobi le connections with 116+million connections and rowin b 50% a ear

Mobile penetration is only 50% of the population with connection growthexpected to continue

Vast majority of Indonesia's mobile connections are prepaid, while high-

Indonesia leads South East Asia in adopting Mobile Broadband service

The number of Mobi le Broadband connections in Indonesia has surpassed thenumber of fixed broadband connections

9

Sources:

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Brazil

The lack of telecommunication infrastructure is the mainobstacle in providing all Brazilians with broadband access

Backhaul is a part of the PSTN high capacity core network,connect ng t e access networ to t e ncum ent s

Backbone

The Brazilians government policy was to spread the

ac au n o a raz an mun c pa es as a n versaService Goal

The Backhaul will provide broadband access to the majorityo e popu a on

10Source:

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Deploying VSAT toDeploying VSAT to

Support CellularSupport Cellular

BackhaulBackhaul

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Satellite Efficiency for

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Source: Ericcson, Comtech, Intelsat

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Example VSAT Access

Courtesy of www.comsys.co.uk14

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VSAT Access Technology

Single Channel Per Carrier (SCPC)

Generally provides determinist ic bandwidth and superior Quality of

Service (QoS) Does not lend itself easily to sharing

Well suited for sharing

Does not provide deterministic bandwidth or QoS

Unsuitable for man a lications

Most vendor implementations suffer from significant inefficiencies

Legacy outbound encapsulation schemes with very high signaling overhead

Poor spectral effic iency of the TDMA return

Remote BUC/SSPA sized for the transmission rate of the TDMA return

High jitter and packet loss unless the links are significantly over

provisioned

Generally require an annual maintenance contract for support

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VSAT SolutionVSAT Solution

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Global Leaders in

Our subsidiary, Memotec, suppl iesinnovative optimization solutions for

cellular backhaul networks

Comtech EF Data is the recognized

Satelli te and terrestrial 2G/3G and DCMEoptimization solutions for GSM and CDMA

networks, as well as disaster recovery

solutions for mobile applications

global leader in satellite bandwidth

efficiency and link optimization

Our infrastructure products (modems,amplifiers, converters, etc.) are

e ags p er es pro uc ena esGSM operators to dramatically reduce

network operating expenses by cutting

transmission costs and extending thens a e n + coun r es

Our advanced solutions enablecommercial and government users to

reduce OPEX/CAPEX and to increase

serv ce capa es or evo v ngnetworks

Memotecs solution is proven globallywith equipment deployed in over 200

transportable satellite-based

applications

cellular network operations throughout

the world

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Advanced VSAT Series

Advanced Forward Error Correction FEC

DVB-S2 for the shared outbound Better performance compared to VSATs using other FEC or DVB-

S2 Short FEC Frame

VersaFEC short-block low latency LDPC for the returnchannels

Far better performance compared to other VSAT products

Adaptive Coding and Modulation (ACM) capable

(rain fade, inclined orbit satellite operation, interference orother impairments), ACM allows each remote to achieve

maximum throughput

Maximizes network efficiency and availability

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Typical IP Network

DVB-S2

Outbo

und

VersaFEC

eturn

Gig

abitEthernet

CDM-800 Gateway Router GigECDM-840 Remote

Router

GigE-

Internet

CDD-880 Multi-Receiver Router

Router

GigECDM-840 Remote

Router

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Typical Network - E1 RAN and IP

DVB-

S2

Outbo

und

ersaFE

C

turn

R

CDM-800 Gateway RouterE1GigE

CDM-840 Remot e

Router

E1GigE

CXU-810 RAN Optim izerBSC

E1

E1

Internet

CDD-880 Multi-Receiver Router

-

Router

E1GigE

CDM-840 RemoteRouter

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Advanced VSAT Series Benefits

Highest Spectral Efficiency Most effic ient physical layer in

Use of VersaFEC reduces thesites transmit EIRP (smaller

Low overhead framing

Most efficient transport ofhigher layers

BUC/SSPA sized for site trafficrequirements

Inte rated RAN o timization Payload compression

Header compression

Integrated RAN Optimization

eliminates the need for a

separate mediation device at

Remote

These features can easilyprovide 30-60% bandwidth

savings compared to legacy

These features can easilyprovide 30-60% total CAPEXsavings compared to legacy

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Advanced VSAT Series Benefits

eam ess m gra on rom

an E1 RAN to an all IP RAN

mprove erv ce ua y

Guaranteed Bandwidth Once provisioned, the

ca a e

Data rate

Network size

Low Latency

No wait for bandwidth

allocation

Improved Availability Low Jit ter

Always available bandwidth

allows significantly better

need for excessive bufferingand segmentation and

reassembly

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Unmatched Network Efficiency for

Leveraging our globalleadership in cellular

backhaul solutions, wedeveloped products that are

cellular backhaul and high-

performance IP transport in

hub-spoke networkenv ronmen s

Our VSAT solution

Provides significantly

compared to other VSATsolutions

Minimizes OPEX and CAPEX

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Comtech Enables Service Expansion

As ou re are for serviceexpansion into rural and remote

locations, consider using the globalleader in cellular backhaul solut ions

ur a vance tec no og es canenable you to:

Realize bandwidth efficiencies

Reduce your required capitalexpenditures and operating

expenses

Mobile operators globally are usingComtech equipment to:

Expand into low density regions

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Contact Us:Contact Us:

es reees ree

Tempe, AZ 85281Tempe, AZ 85281USAUSA

. . .. . .

FAX 1.480.333.2540FAX 1.480.333.2540

sales@comtechefdata.comsales@comtechefdata.com

. .. .