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© 2008 Cisco Systems, Inc. All rights reserved. SMBEN v2.0—7-2

Module Overview

Upon completing this module, you will be able to:

Describe the process of designing an SBCS 1.0 solution

Describe the process of implementing a SCBC network solution

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Cisco SBCS Solution Design

Small BusinessCommunication SystemSolution Design

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Lesson Objectives

Upon completing this lesson, you will be able to developa Cisco SBCS network design. This ability includes beingable to meet these objectives:

Articulate SBCS overview, capabilities, topology and components

Describe SNF considerations within the SBCS design

Recall Cisco Unified Communications for SMB customers

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SBCS: The Solution

SBCS is designed for SMB to provide the full range of communication needs:

Voice

Data

Video

Security

Wireless capabilities

SBCS focuses on businesses with as many as 64 users,

some of whom can be located in teleworker home officesor mobile worker locations.

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SBCS Solution Design Capabilities

Cisco SBCS solution provides the following capabilities:

WAN access

LAN switching

Controller-based WLAN roaming connectivity

Integrated security

Call processing

Integrated messaging

GUI-based provisioning using CCA

GUI-based network management using Cisco Monitor Director Agent and Cisco Monitor Director

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SBCS Topology

Main Office LAP521

CE520

FaxUC520

Cable/DSLModem

WLC526

CCA and CiscoMonitor Director

Cisco Monitor Director

Partner Site

Mobile Worker at anypublic place (optional)

Teleworker At HomeOffice (optional)

Cisco871W

PSTN

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SBCS Solution Design Components

Number of Users

Device Access Switch Unified IP phones 500 or 7900 or

IP Communicator

WLAN

1-8 UC520-8U None Up to 10 Integrated* or External AP

9-16 UC520-16U CE520-8PC Up to 18 Integrated* or External AP

17-24 UC520-24U CE520-24PC-K9 Up to 28 External AP



RemoteSite

Cisco 871 CE520-8PC** 1-5 of UC520 total Integrated* or External AP

RemotePC

Cisco VPNClient

None 1 of UC520 total — IP Communicator only

Not applicable

* Product Option ** If required

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SBCS Design:Layer 2 and Layer 3 Design

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Layer 2 Design: VLAN Design

WLC526 UC520 CE520

Cisco-Data VLAN 100

Cisco-Voice VLAN 1 Native VLAN for 802.1Q

802.1Q Trunk over physical connection between Switchports

LAP521

Layer 2 LAN

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Layer 2 Design: Trunking and STP

Trunking

– Enables physical connections between devices to carry trafficfrom multiple VLANs

STP – Enables Layer 2 devices to dynamically discover loops in the

network and to block them

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Layer 2 Design: SmartPort Roles

Cisco-verified feature templates that configure the followingwith minimal effort and expertise:

– Switching

– Security

–PoE for IP phones and wireless APs

– QoS

Selected from a drop-down menu in GUI-based provisioningapplication

Reflects the type of device to be connected

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Layer 2 Design:Recommended SmartPort Role Assignments

Device Port Type and Number RecommendedPort Role

Recommended DeviceConnection

UC520 8-port internal switch:FastEthernet port 1/0 to 1/7

IP phone + desktop IP phone/desktop

AP AP-521/LAP-521

AP WLC-526

Expansion Port: FastEthernet 1/8 Switch WS-CE520 series of switch

WAN Port: FastEthernet 0/0 Cannot be changed LAN port of DSL /cable modem

WS-CE520-24PC

FastEthernet 1 to 24 IP phone + desktop IP phone/desktop

AP AP-521/LAP-521

AP WLC-526

Expansion Slots:Gigabit Ethernet 1 to 2

Switch UC520 or another WS-CE520 switch

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Layer 2 Design: PoE

Power over Ethernet:

Offers 48-volt DC power over standard Ethernet cable

Enables Cisco Unified IP phones and other devices to obtainpower

Ensures operational devices remain online during power failuresituations

Is supported by the CE520 and UC520 switches

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Layer 3 Design

Provides the capabilities necessary to forward traffic betweenLayer 3 segments, or VLANS

General Layer 3 design considerations:

– IP addressing

–DNS

– NAT

– IP routing

– NTP

Layer 3 considerations specific to unified communicationsdeployments:

– TFTP

– DHCP

– QoS

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Layer 3 Design: TFTP and DHCP

DHCP provides IP addresses to client devices dynamically

TFTP is a simplified version of FTP

IP phones rely on a TFTP server to acquire configuration information

LaptopIP phone UC520 DHCP

server

TFTPserver

Data VLAN scope

Voice VLAN scope

Phone configurationand software

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Layer 3 Design: QoS Definition

QoS:

Provides improved service to selected network traffic over technologies such as:

– Frame Relay

–MLPS

– Ethernet

QoS processing provides:

– Dedicated bandwidth support

–Improved traffic-loss characteristics

– Network congestion avoidance and management techniques

– Traffic shaping

– Traffic prioritization

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Layer 3 Design: LAN QoS

QoS in the LAN is configured:

Through SmartPort roles

When templates are assigned to switch ports, which:

– Map CoS (Layer 2) and DSCP (Layer 3) values to queues

–Set round-robin queuing allocations for switch ports

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Layer 3 Design: WAN QoS

Different connection speeds between switch ports and WAN connections:

Create traffic processing problems

Cause congestion of the WAN interface

Create problems with routing and VoIP

Do not create congestion issues with traffic sent from WAN to LAN

Monitor Director

Main Office

Cisco IPphone

Windowsserver

CatalystExpress

Mobile Worker

Partner Site

Monitor Director

IP phone800 ISR

Home Office

UC520 withCommunication

Manager ExpressUnity Express

PSTN

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SBCS Design: Cisco Unified Communications

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Cisco Unified Communications: Features

Call-coverage features: Call waiting

Call forwarding

Call-handling features: Call hold

Call transfer

Conferencing

IP phone features: Speed dials

Intercom

Call hunt

Call pickup

Call park

Call blocking

Paging

Music-on-hold (MOH)

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Cisco Unified Communications:Remote IP Phones

Remote IP Phone withG.711 codec

(transcoding support)(for low bandwidth remote

workers)Mobile worker with

Softphone

No E911Support

Cisco871W

Home Office

MainOffice

UC520

VPN Tunnel

VPN Tunnel

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Cisco Unified Communications: Dial Plan

Instructs the UC520 to route calls appropriately

Designed to perform:

– Endpoint addressing

– Path selection

–Call privileges

– Digit manipulation

Three deployment methods:

– PBX model

–Keyswitch model

– Hybrid (PBX+Keyswitch) model

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Cisco Unified Communications:Analog Devices

UC520 and analog devices:

Four analog telephony ports (FXS) are provided in the8 to16-user model

Optional: VIC slot of the 32 to 64 user model

Analog devices connected to FSX ports do not count againstthe maximum number of IP endpoints supported

Limit of four analog devices

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Cisco Unified Communications:Voice Gateway Overview

PSTN

PSTN-to-VoIPcallConference

call

IP phones inSBCS network

DSP resources inthe UC520

Analog/digital interface(FXO, BRI, T1/E1 PRI)Transcoding for

remote(G.729 to/from

G.711)

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Voice Gateway: Telephony Interfaces

Types of telephony interfaces:

Analog – FXS, FXO, analog DID, E&M, and CAMA

– FXO and analog DID are used to connect to the PSTN

– FXS are used for connecting fax machines and analog phones

Digital –

BRI, T1 CAS, E1R2, and T1/E1 PRI

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Voice Gateway: Benefits of SIP Trunking

SIP-based VoIP equivalent of the analog or digital trunks fromtraditional PSTN

Service provider for a SIP trunk provides:

– Basic connectivity

–Emergency services

– Dial plan management

– Operator services

– Long-distance services

–

Optional local number portability – Optional call features

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Lesson Summary

The Cisco SBCS is designed for SMBs to provide voice, data,video, security, and wireless capabilities—while integrating withexisting applications.

Layer 2 and Layer 3 designs provide system management toolsfor SMBs using SBCS.

Cisco Unified Communications offers several features available inthe categories of call coverage, call handling, and IP phone.

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