Module 1: Optimizing Converged Cisco Networks (ONT)Cisco ...

Module 1: Optimizing Converged Cisco Networks (ONT)Cisco Networks (ONT)

The Evolution of Telephony in the Enterprise

© 2006 Cisco Systems, Inc. All rights reserved.

Objectives

Describe the history of the telephone services industry and its affect on modern business practices.

Identify the components of the traditional telephone system.

Describe traditional POTS service.

Describe ISDN & T1 servicesDescribe ISDN & T1 services.

Explain the drivers of converged networks.


Objectives

Explain the Cisco conceptual network models, such as Cisco Enterprise Architecture and Cisco hierarchical network model.

Describe the traffic conditions in a converged network.

Describe the IIN and the SONA framework.


Basic Telephone System

A telephone system has four elements: A telephone set to convert sound to electrical signals and back to soundto sound One or more central switching facilities Connections to the central switching facilitiesConnections to the central switching facilitiesConnections among multiple switching centers across telephone networks

Subscribers connect to the telephone network using: Dedicated wire connections in overhead or underground cablesR di ( ll l t llit di t l h )Radio waves (cellular, satellite, or radiotelephone)VoIP


Basic Components of a Modern Telephone p pSystem

Long Distance and

IPCentral Office with Switches

Long Distance and International Connections

Fiber

with Switches

Local Loop

POTS and ADSL

Home Office with Corporate VPN including VoIP

Cellular Phone System


including VoIP

Traditional POTS Services

PSTN or PTT (POTS) has remained practically unchanged for over 100 years offering:

Bi-directional, or full duplex, voice path to carry sound both ways at onceDial tone and ringing signalsDial tone and ringing signalsSubscriber dialingOperator services such as directory assistance long distanceOperator services, such as directory assistance, long distance, and conference calling assistancePower


ISDN and T1 Services

ISDN: A set of standards that allow data and voice to be carried on copper wire from the telephone exchange to customer premises:

BRI: 2 B-channels and 1 D-channel for controlPRI 23 B h l (30 i E ) d 1 D h l f t lPRI: 23 B-channels (30 in Europe) and 1 D-channel for control

T1 Carrier System: Specification for digital transmission b t t l h h d ti di tlbetween telephone exchanges and sometimes directly to customer premises. T1 uses copper wire or fiber.


Digital Telephone Services

Digital Telephone Services include:Voice mail Caller ID Call waiting Reminder callsReminder calls (Three-way) conference calling Enhanced 911 (in North America)Enhanced 911 (in North America)CentrexA number of other similar services


PBX and Centrex

Centrex (a virtual PBX):Call Transfer C ll Di t l d b llCall Divert – on no reply and on busy callsCall Waiting Three-Party ConferenceThree Party Conference Call Pick Up (Group) Ring Back Reminder or Alarm Call Last Number Redial C t H tli ( di l d ti )

Typical Centrex telephone. Note the Recall button and the Message

Waiting lamp.

Centrex Hotline (non-dialed connection) Centrex Warm Line (delayed Hotline) Centrex Hunt Groups, with optional bypass numbers


Centrex Hunt Groups, with optional bypass numbers

Long-Distance Calling Challenges

May I have a line to Chicago?

Is this a

PSTN

Is this a business call?

Y it i

Thank you One

Yes it is.

Thank you. One second please.

Chicago Office

PBX


Long-Distance and WATS

Long-distance trunk lines connect telephone exchanges.g

Long-distance services include:OUT-WATS: Flat-rate long-distance callingIN-WATS: Toll-free calling using 1-8xx numbers


Separate Voice, Video, and Data Networks

San Jose Office

London Office

PBXPBX

Tokyo Office


PBX

Converged Voice, Video, and Data Network

PSTN

IP WANIP WAN


Self Check

1. What are the 2 levels of ISDN service?

2 What is a Centrex?2. What is a Centrex?

3. What is a WATS-type plan?

4. What options are available in WATS plans?


Optimizing Converged Cisco Networks (ONT)

Describing Converged Network Requirementsg g q


Traditional Hierarchical Model


Cisco Enterprise Architecture


Campus Architecture

Campus Architecture combines a core infrastructure

IP Communications

pof intelligent switching and routing including:

mobilityadvanced security


advanced security

Data Center Architecture

The Data Center is a cohesive, adaptive network

requirements for consolidation

The Data Center is a cohesive, adaptive network architecture supporting:

requirements for consolidation

business continuance

it


security

Branch Architecture

The Branch allows enterprises to extend head-office

security

The Branch allows enterprises to extend head office applications and services including:

security

IP communications

d d li ti f ti


advanced application performance supporting thousands of remote locations/users

Teleworker Architecture

Teleworker architecture allows enterprises to securelyTeleworker architecture allows enterprises to securely deliver voice and data services to remote, small or home offices.

–Integrated security–Identity-based networking services


WAN Architecture

WAN architecture offers the convergence of voiceWAN architecture offers the convergence of voice, video and data services over a single IP communications network.


Example: Enterprise Network


Network Traffic Mix and RequirementsConverged network traffic mix:Converged network traffic mix:

Voice and video trafficVoice applications trafficppMission-critical applications trafficTransactional trafficRouting update trafficNetwork management trafficBulk transfer (best effort) and scavenger (less than best effort)Bulk transfer (best-effort) and scavenger (less-than-best-effort) traffic

Key requirements:y qPerformance (bandwidth, delay, and jitter)Security (access and transmission)


Example: Integrated Services in a Converged p g gNetwork


Intelligent Information Network (IIN)

IIN integrates networked resources and information assets.

IIN extends intelligence across multiple products and infrastructure layers.

IIN actively participates in the delivery of services and applications. (making the network “application aware”)


Phases of IIN

Three phases in building an IIN are:Integrate transport (network convergence)

Integrate services (shared resources)

Integrate applications (making the network “application aware”)


Cisco SONA Framework

Cisco SONA is an architect ral frame orkCisco SONA is an architectural framework.(SONA: Service-Oriented Network Architecture, describe how to build a IIN: Intelligent Information Network)build a IIN: Intelligent Information Network)

Cisco SONA brings several advantages to enterprises:Outlines how enterprises can evolve toward the IINOutlines how enterprises can evolve toward the IINIllustrates how to build integrated systems across a fully converged intelligent networkImproves flexibility and increases efficiency

Cisco provides an extensive product line, services, p p , ,proven architectures, and experience to help the enterprises achieve their business goals. (close gaps b t th d li ti )


between the resources and applications)

Cisco SONA Layers


SONA—Networked Infrastructure Layer

The goal is “anywhere/anytime connectivity ”The goal is “anywhere/anytime connectivity.”


SONA—Interactive Services Layer

voice and collaboration application networking servicesInteractive services includes:

voice and collaboration servicesmobility services

it d id tit i

application networking servicesnetwork infrastructure virtualization

i tsecurity and identity servicesstorage servicescomputer services

services managementadaptive management services


computer services

SONA—Application Layer

business applicationsApplication Layer includes:

collaboration applications


Self Check

1. What are the 3 building blocks of the hierarchical model?

2. Describe the special needs of voice and video traffic.

3 What types of traffic could be considered best-effort3. What types of traffic could be considered best-effort and less-than-best-effort?

4 What is AON?4. What is AON?

5. What are the 3 layers of SONA?


Q and A


SummaryCompanies have used telephone services for over 100Companies have used telephone services for over 100 years as a part of their business practices.

Changing technology and changing enterprise needsChanging technology and changing enterprise needs have influenced changes in telephony services.

The increasing use of IP transport for data voice andThe increasing use of IP transport for data, voice and video has lead to the need for converged networks.


The traditional three layer hierarchical model no longer

SummaryThe traditional three-layer hierarchical model no longer completely meets the needs of large converged networks carrying voice, video, and data. IIN aligns IT

ith b i i itiresources with business priorities.Cisco Enterprise Architecture and SONA provide a framework for deploying converged networksframework for deploying converged networks.Dealing with complex traffic mixes is a key feature of Cisco Enterprise Architecture The Service layer ofCisco Enterprise Architecture. The Service layer of SONA addresses the performance and security requirements of converged networks.IIN aligns IT resources with business priorities.Cisco SONA provides an evolutionary path to IIN.


p y p

Resources

Wikipedia Telephone Exchange articlehttp://en.wikipedia.org/wiki/Telephone_exchange

Cisco IP Telephones on Converged Network Enable Rapid Emergency Responsep g y p

http://newsroom.cisco.com/dlls/partners/success_stories/2001/pss_10-10.html

Making the Business Case for Unified Communicationshttp://www.cisco.com/en/US/netsol/ns340/ns394/ns165/networki l ti di b i b fit0900 d80472 fb hting_solutions_audience_business_benefit0900aecd80472efb.html


Resources

Business Overview of Cisco SONAhttp://cisco.com/en/US/netsol/ns340/ns394/ns431/networking_solutions_white_paper0900aecd803efff3.shtml

What is IIN?http://cisco.com/en/US/netsol/ns650/networking_solutions_market_segment_solution.html

Enterprise Architectures Posterhttp://cisco.com/application/pdf/en/us/guest/netsol/ns477/c643/cdccont 0900aecd802843ce pdfdccont_0900aecd802843ce.pdf



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