Curso: Redes y comunicaciones II: 02 CaaS, NaaS. Dictado en la Universidad Tecnológica del Perú, Lima - Perú, ciclos 2011-3 (octubre/2011) y 2012-1 (abril/2012).

1. Semanas 05, 06, 08 y 09
Cloud Computing (cont)
CaaS, NaaS
Redes y Comunicaciones II
Ingeniería de Redes y Comunicaciones
Facultad de Ingeniería de Telecomunicaciones y Telemática
Universidad Tecnológica del Perú
Ing. CIP Jack Daniel Cáceres Meza 2011-III V1

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Ing. CIP Jack Daniel Cáceres Meza
Communications as a Service
Hosted communications
 The most popular reason for choosing
hosting, cited by 50% of respondents, was
the beneficial cost structure it delivers: no
capital investment and a pay-as-you-go
approach to expenses.
 Eliminate the yearly budget battles that
ensue when your on-premise gear needs
to be upgraded or repaired.
 Have a known fixed cost for your
communications service and leave the
upgrades to someone else.
 Includes the ability to keep all call traffic on
your network instead of sending it
thousands of miles away to a data center.
The number of CaaS
agent positions will
grow from 107k in
2008 to 331k in 2013 –
a CAGR (compound
average growth rate)
of 25%. Gartner Feb.
2009.
“Almost 60% of organizations are implementing UC
services, up from 47% just last year … It’s this
increased deployment of UC applications that has
triggered evaluation and adoption of hosted and
managed UC offering“. Nemertes Research, Aug. 2010.
• Minimize capital
expenditures and
operating expenses
• Less technical IT
expertise required
• Easier to deal with
seasonal demands
• Shared infrastructure
for small call centers
• Survivability that allows
you to continue
operating

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Ing. CIP Jack Daniel Cáceres Meza
CaaS
 Architects of CaaS solutions will be required to understand the networks
and protocols that will be used to access the CaaS solution.
 Moving to a CaaS solution means that employees may be located
virtually anywhere, from a common corporate building or they can all be
remote working from different locations. The features and functionality
follow the user wherever their work takes them.
 Can offer the enterprise user features such as desktop call control,
presence, unified messaging, and desktop faxing.
 Has a set of services for contact center automation that includes IVR,
ACD, call recording, multimedia routing (e-mail and text chat), and
screen pop integration.
 Local call management devices are part of the total solution in several
CaaS models making the worry of an outage a thing of the past.

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Ing. CIP Jack Daniel Cáceres Meza
Introducción
 Converged communications
 Multiple services – video; voice; and data; accessible over multiple
devices – wire-line telephone; mobile or smart phone; and PC (to
mention a few).
 As more services become available over multiple devices, the line
between software applications and communications applications
begins to blur.
 Many of the traits traditionally associated with communications
applications—such as event-driven connections established
between endpoints (point-to-point conference, multi-cast) —using
communications protocols will also become requirements of
business or entertainment software.

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Ing. CIP Jack Daniel Cáceres Meza
Introducción
 SIP
 The SIP infrastructure provides an environment for creating event-
driven applications that contact the end user on the device of their
preference.
 Applications using SIP can communicate with end users wherever
they are, on whatever device they specify, using multiple forms of
media (video, voice, and data).

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Ing. CIP Jack Daniel Cáceres Meza
Introducción
 IP Multimedia Subsystem
 IMS is a network component that may have an impact on how
communications solutions are architected.
 IMS is the element of Third Generation (3G) networks that
facilitates the convergence of the Internet and cellular networks.

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Ing. CIP Jack Daniel Cáceres Meza
Arquitectura de referencia

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Ing. CIP Jack Daniel Cáceres Meza
Factors for selecting a CaaS methodology
 Business Continuance/Disaster Recovery
 Investment in Existing Equipment
 Initial cost
 Recurring cost
 Functionality
 Connectivity
 Security
 Administration
 Survivability
Currently, there are three
primary types of CaaS
offerings in the marketplace:
• Hosted VoIP
• Hosted TDM
• Local Control/VoIP

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Ing. CIP Jack Daniel Cáceres Meza
Hosted VoIP
The primary equipment
and telco circuits are
located at one or more
facilities operated by the
hosting company.
For best call quality, the
customer should use a
connection that supports
Quality of Service (QoS)
to prioritize and protect
voice traffic over their
network connection.

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Ing. CIP Jack Daniel Cáceres Meza
Hosted TDM
Good choice when disruption
to the business could be more
expensive than the cost of the
equipment.
Need for quick time-to-market,
lack of personnel with sufficient
network or VoIP expertise.
Move to a new facility is in the
near future or when investing
in the current facility’s
infrastructure doesn’t make
sense.
The hosted system connects
the incoming call to the agent
via a bridged call to the agent.
Typically, the agent works
behind a traditional PBX
system using DIDs.

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Ing. CIP Jack Daniel Cáceres Meza
Local Control/VoIP
Helpful for customers who have or desire
to create a robust local network supporting
VoIP but need to add advanced
functionality that their current system
doesn’t support. Instead of replacing an
entire phone system or creating a
patchwork of existing features, the
customer can connect to a more advanced
system to provide greater functionality.
While calls come into equipment located
on the customer premises, call control is
handled by the advanced phone system
located in the hardened data center.
The customer’s telco lines remain at the
customer’s location. This works especially
well when a customer has a preferred
voice carrier, has existing contracts that
must be fulfilled, or possesses many
existing numbers they would prefer not to
port or forward. They also avoid the costs
of forwarding or bridging calls.
Should the WAN connection to the
datacenter be interrupted, calls can still be
handled by the on premise equipment,
although with less functionality.
• Keep the voice path on your private network
• Securely store recordings on local servers
• Maintain customer data in local databases

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Ing. CIP Jack Daniel Cáceres Meza
Network as a Service
 Network Bandwidth on-demand (BoD)
 Bandwidth on demand is a data communication technique for
providing additional capacity on a link as necessary to
accommodate bursts in data traffic, a videoconference, or other
special requirements.
 The technique is commonly used on dial-up lines and wide area
networks (WANs) to temporarily boost the capacity of a link.
 Some call it "rubber bandwidth" because the capacity can be
increased or decreased as needed.
 It is also called dynamic bandwidth allocation or load balancing.
 A similar technique is bandwidth on time of day, which refers to
providing additional capacity at specific times of the day.

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Ing. CIP Jack Daniel Cáceres Meza
Network as a Service
 Today we have CPUs and Storage on-demand, but we do not have
Network Bandwidth on-demand. This business and technology
challenges are important to enable economical solution for clouds
interoperability (VMs migration, large data transfers, etc.)
 NaaS enablers, including SLA/QoS management, addressing, mobility
management, etc.
 The ISP/Telco ability to deliver on-demand network services.
 The need for relevant solutions and standards (Next generation
networks, etc.).
 With their valuable communications assets and massive subscriber
base, the global (mobile) telecom network can tap the cloud computing
market and provide valuable, revenue generating cloud computing
capabilities in the form of Network as a Service (NaaS).

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Ing. CIP Jack Daniel Cáceres Meza
NaaS
 For MNOs, the increase in demand for mobile data services is a double-
edged sword.
 On one hand, they are gaining revenue to help offset losses in the voice
business.
 On the other hand, explosive growth of data traffic is not corresponding with
the linear revenue growth previously experienced.
 This results in taxed networks and puts MNOs in the uncomfortable
position of enabling new services delivered via the Internet that benefit
customers but don’t necessarily pay off for those making investments in
the network.
 In effect, they have been disintermediated from the value chain.
 For MNOs to succeed, they require new sources of revenue that expose
the latent value of network investments and they also must remain
realistic about where, how and when value can be added by new
business models.
Fuente: The Yakee Group, Aug 2011

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Ing. CIP Jack Daniel Cáceres Meza
NaaS
 Selling a service instead
of access will be the
future for all
telecommunication
companies to come.
 MNOs (Mobile Network
Operator) in order to
retain control over their
networks, while
preventing customer
churn, diminished
profitability and brand
devaluation, must shift
their role from traffic
carrier to “application
enabler”.
Fuente: telecom-cloud.net, Jul 2011

16. Ing. CIP Jack Daniel Cáceres Meza
jack_caceres@hotmail.com
Gracias por su atención
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