Toshiba VoIP MOS User Manual

The VoIP Deployment Challenge

Before you know how much a VoIP deployment will cost and how
successful it will be, you need to understand if your data network
can carry high-quality voice transmissions. The odds are that a
network upgrade will be needed to successfully deploy VoIP.

VOIP Network

Assessments

The assessment quickly diagnoses the majority of your network
issues so that by the time you begin your VoIP deployment, you
have a converged network that will carry high-quality voice trans­missions.

Consider the facts: “85% of today’s router-based data networks
are not ready for successful voice deployment.” - Gartner Group

Your data network was originally designed to support emails,
fi le transfers and deliver Web pages, not carry high quality voice
transmissions. Voice traffi c is very time sensitive and can’t be
queued like email or Web traffi c. Delays up to a half hour for an
email or fi le transfer are generally not a problem, but delays of
only a few hundred milliseconds can ruin a VoIP call, producing
choppy conversations or dropped calls.

To ensure your VoIP deployment is successful and on budget, you
need to fi nd answers to these important questions before deploy­ing VoIP:

What type of VoIP MOS (Mean Opinion Score) call quality can I

expect from my current data network for each business site?

Is network delay, loss or jitter the main problem impacting VoIP

call quality, and how do I fi x it?

How many concurrent VoIP calls can my network carry without

impacting existing data services?

Knowing this information before deploying VoIP will ensure your
success, but what is the most accurate and cost effective method
to obtain it?

Organizations that skip this important deployment step experience
poor call quality, dissatisfi ed users, upgrade cost overruns and
delayed deployments.

Compare in Figure 1 the typical outcome of VoIP deployments that
include a VoIP Assessment vs. ones that skip this important step:

Figure 1 VoIP Deployment Comparison

The VoIP Deployment Solution

The fastest and most cost effective way to determine your network’s
VoIP readiness is to conduct a Toshiba VoIP Network Assessment.

How Our VoIP Assessments Work

The goal of the Toshiba VoIP assessment is to determine how well
VoIP will sound on your network and diagnose any technical issues
that could negatively impact call quality.

Our unique VoIP assessment solution is very simple to conduct and
separates us from our competition since it does not require onsite
consultants to set up and run the assessment. We simply ask a site
employee to download a small piece of software called a “traffi c
agent” onto one or two existing PCs or servers per site. Then the
assessment is run remotely by our engineers without interrupting
your operations.

The assessment determines call quality using traffi c agents to send
actual VoIP traffi c across your network. It measures the resulting
MOS call quality, network delay, jitter and loss for calls between
any of your business sites.

Figure 2 illustrates a VoIP assessment testing the wide-area net­work (WAN) connections between the Los Angeles and New York
offi ces and between the San Francisco and Denver offi ces. The
assessment is measuring the WAN performance of 20 concurrent
VoIP calls between Los Angeles and New York and 15 concurrent
VoIP calls between San Francisco and Denver.

The VoIP calls are run continuously for the duration of the assess­ment to measure call quality during different times of the day and
week. At the end of each VoIP call, the results are reported back
from the traffi c agents to the test center and logged in a database.
These results are used to create a detailed report summarizing the
results of the VoIP assessment.

At the end of the assessment our clients know the exact state
of their VoIP network readiness:

The MOS call quality score between all business sites

How many concurrent VoIP calls each WAN will support

between sites

The amount of network delay, loss and jitter for each WAN

and LAN connection and how to eliminate these problems

With this information determined before you deploy VoIP, your
initial deployment will exceed user expectations and reduce your
deployment risks and costs.

Conclusion

Your network was not originally designed to carry high quality voice
transmissions. To deploy VoIP successfully you need to conduct a
VoIP network assessment fi rst. If you skip this important step your
probability of diffi cult network challenges is greater than fi fty percent.
Eliminate deployment risk, upgrade cost overruns and dissatisfi ed
users by conducting a Toshiba VoIP network assessment. Your business
will thank you for it.

Figure 2 Typical Toshiba VoIP Assessment

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