© 2006 Cisco Systems, Inc. All rights reserved. EDC113 CCNP4 ONT Module 1 Lesson 1

© 2006 Cisco Systems, Inc. All rights reserved.

EDC113 CCNP4

ONT Module 1 Lesson 1


http://portal.techhigh.us/Teachers/mannf/Pages/default.aspx


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Optimizing Converged Cisco Networks (ONT)

Lesson 1.1: The Evolution of Telephony in the Enterprise


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 services.

Explain the drivers of converged networks.


Basic Telephone System

A telephone system has four elements: A telephone set to convert sound to electrical signals and back to sound

One or more central switching facilities

Connections to the central switching facilities

Connections among multiple switching centers across telephone networks

Subscribers connect to the telephone network using: Dedicated wire connections in overhead or underground cables

Radio waves (cellular, satellite, or radiotelephone)

VoIP


Basic Components of a Modern Telephone System

Fiber

IP

POTS and ADSL

Central Office with Switches

Home Office with Corporate VPN including VoIP

Cellular Phone System

Long Distance and International Connections

Local Loop


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 once

Dial tone and ringing signals

Subscriber dialing

Operator services, such as directory assistance, long distance, and conference calling assistance

Power


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 control

PRI: 23 B-channels (30 in Europe) and 1 D-channel for control

T1 Carrier System: Specification for digital transmission between telephone exchanges and sometimes directly to customer premises. T1 uses copper wire or fiber.

ISDN and T1 Services


Digital Telephone Services include:Voice mail

Caller ID

Call waiting

Reminder calls

(Three-way) conference calling

Enhanced 911 (in North America)

Centrex

A number of other similar services

Digital Telephone Services


Centrex (a virtual PBX):Call Transfer

Call Divert – on no reply and on busy calls

Call Waiting

Three-Party Conference

Call Pick Up (Group)

Ring Back

Reminder or Alarm Call

Last Number Redial

Centrex Hotline (non-dialed connection)

Centrex Warm Line (delayed Hotline)

Centrex Hunt Groups, with optional bypass numbers

Typical Centrex telephone. Note the Recall button and the Message

Waiting lamp.

PBX and Centrex


PBX

May I have a line to Chicago?

PSTN

Is this a business call?

Thank you. One second please.

Chicago Office

Yes it is.

Long-Distance Calling Challenges


Long-distance trunk lines connect telephone exchanges.

Long-distance services include:OUT-WATS: Flat-rate long-distance calling

IN-WATS: Toll-free calling using 1-8xx numbers

Long-Distance and WATS


San Jose Office

Tokyo Office

London Office

PBX

PBXPBX

Separate Voice, Video, and Data Networks


IP WAN

PSTN

Converged Voice, Video, and Data Network


Self Check

1. What are the 2 levels of ISDN service?

2. What is a Centrex?

3. What is a WATS-type plan?

4. What options are available in WATS plans?


Summary

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

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

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


Resources

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

Cisco IP Telephones on Converged Network Enable Rapid Emergency Response

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/networking_solutions_audience_business_benefit0900aecd80472efb.html


Lesson 1.2: Describing Converged Network Requirements

Module 1: Converged Network Connectivity Requirements


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.


Traditional Hierarchical Model


Cisco Enterprise Architecture


Campus Architecture

IP Communications

mobility

advanced security

Campus Architecture combines a core infrastructure of intelligent switching and routing including:


Data Center Architecture

requirements for consolidation

business continuance

security

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


Branch Architecture

security

IP communications

advanced application performance supporting thousands of remote locations/users

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


Teleworker Architecture

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


WAN Architecture

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


Example: Enterprise Network


Network Traffic Mix and Requirements

Converged network traffic mix:Voice and video traffic

Voice applications traffic

Mission-critical applications traffic

Transactional traffic

Routing update traffic

Network management traffic

Bulk transfer (best-effort) and scavenger (less-than-best-effort) traffic

Key requirements:Performance (bandwidth, delay, and jitter)

Security (access and transmission)


Example: Integrated Services in a Converged Network


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.


Phases of IIN

Three phases in building an IIN are:Integrate transport

Integrate services

Integrate applications


Cisco SONA Framework

Cisco SONA is an architectural framework.

Cisco SONA brings several advantages to enterprises:Outlines how enterprises can evolve toward the IIN

Illustrates how to build integrated systems across a fully converged intelligent network

Improves flexibility and increases efficiency

Cisco provides an extensive product line, services, proven architectures, and experience to help the enterprises achieve their business goals.


Cisco SONA Layers


SONA—Networked Infrastructure Layer

The goal is “anywhere/anytime connectivity.”


SONA—Interactive Services Layer

voice and collaboration services mobility services security and identity services storage services computer services

application networking services network infrastructure

virtualization services management adaptive management services

Interactive services includes:


SONA—Application Layer

business applications collaboration applications

Application Layer includes:


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-effort and less-than-best-effort?

4. What is AON?

5. What are the 3 layers of SONA?


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

Cisco Enterprise Architecture and SONA provide a framework for deploying converged networks.

Dealing with complex traffic mixes is a key feature of Cisco 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.

Summary


Q and A


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.pdf
