© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1

Design Clinic:Cisco UC Architecture for Corporate Branch Offices

Tim Wellborn – CCIE #15397

May 7, 2008

© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 2

Point of this Session:Two solutions – Same destination

Cisco Public 3© 2007 Cisco Systems, Inc. All rights reserved.

Customer Scenario

“Standalone” Approach

“Centralized” Approach

Summary

Agenda

Cisco Public 4© 2007 Cisco Systems, Inc. All rights reserved.

Primary Focus

Voice (Call Control)

Voicemail

Cisco Public 5© 2007 Cisco Systems, Inc. All rights reserved.

Customer Scenario Branch Offices

“X” number of sites – might acquire 10 more

12 – 75 people each

Couple just 2 users

Fax or two, some analog trunks, larger sites have PRI

Corporate IT/Telecom (help) manage branch systems

Standardize (features, components)

“4-digit” dialing

Lower Costs / Reduce Long-Distance

Migration – Slow rollout

Interoperate w/ HQ PBX

Cisco Public 6© 2007 Cisco Systems, Inc. All rights reserved.

Devil’s in the details

High level requirements can mean more than one thing

Nip “4-digit” dialing now – look to Universal Dial Plan

How standard? Literally one-size fits all or just similar technology?

Willing to adjust WAN/other to support Voice goals?

Interop – define please

Cisco Public 7© 2007 Cisco Systems, Inc. All rights reserved.

More devilish details

Call ControlSingle PBX? Or networked independent?

VoicemailAll on central? Or each site have own Voicemail?

If each have own – still be able to transfer/forward to central? Between branches?

Network with legacy VM at HQ?

We’ll explore above

Cisco Public 8© 2007 Cisco Systems, Inc. All rights reserved.

Approach One

Cisco Public 9© 2007 Cisco Systems, Inc. All rights reserved.

Approach One

Per site Voice and Voicemail

Cisco Unified Communications Manager Express

Cisco Unity Express

Cisco Public 10© 2007 Cisco Systems, Inc. All rights reserved.

How CUCME/CUE fits criteria

“Buy as you grow”

Leverage H.323 for inter-site calling

Can use variety of ISR sizes – still ‘standardized’

CUE for per-site VM

Remote management by central support team

Use Voice Gateway to connect to HQ PBX

Cisco Public 11© 2007 Cisco Systems, Inc. All rights reserved.

CUCME/CUE - Step One

• 1861/2800/3800 size to # phones1861 (8) to 3845 (250)

PSTN

BRANCH “A”

• Local phones

• CUE licensed for # mailboxAIM-CUE

NME-CUE

• PSTN trunks Analog VIC

PRI VWIC

FAX

Cisco Public 12© 2007 Cisco Systems, Inc. All rights reserved.

CUCME/CUE – Add branch

PSTN

BRANCH “A”

• Configure dial-peers so can call each other

• Separate Voicemail

Voice/DataNetwork

PSTN

BRANCH “B”

CUCME/CUE CUCME/CUE

FAXFAX

Cisco Public 13© 2007 Cisco Systems, Inc. All rights reserved.

CUCME/CUE – Add HQ

PSTN

BRANCH “A”

• More dial-peers

• Still separate VM

Voice/DataNetwork

PSTN

BRANCH “B”

V

Voice Gateway

WAN router

HEADQUARTERS

Voice

CUCME/CUE CUCME/CUE

FAXFAX

Cisco Public 14© 2007 Cisco Systems, Inc. All rights reserved.

Directory Gatekeeper - Network Scaling

Small Network - Gateways only

Medium Network - Multiple GatekeepersMedium-Large Network - Multiple

Gatekeepers and a Directory Gatekeeper

Small Network - simplified with a Gatekeeper

Gateway Gatekeeper Directory Gatekeeper

Cisco Public 15© 2007 Cisco Systems, Inc. All rights reserved.

H.323 With RAS

Registration, Admission and Status

Gatekeeper

CUCME A System B

Address Translation: Every GW needs to know only about the GK, not about all other GWs

IP QoS Network

H.225 (Q.931) Call Setup (TCP)

RTP (UDP)

H.245 Call Control (TCP)

H.225

RAS (UDP)

H.225 RAS (UDP)

Cisco Public 16© 2007 Cisco Systems, Inc. All rights reserved.

Fancy Stuff

Voice Networking Make dialplan manageable Provide redundancy to dialplan component

SOLUTION: Cisco Gatekeeper

Voicemail Networking Network CUE systems Network w/ central Avaya

SOLUTION: Cisco Unified Messaging Gateway

Cisco Public 17© 2007 Cisco Systems, Inc. All rights reserved.

Cisco Unified Messaging Gateway

Hub in a unified messaging network, centralizes message routing and rules

Supports all Cisco Unified Messaging solutions Enables scaling of a unified messaging network as required by branch

offices or enterprises Simplifies configuration and management tasks Helps customers migrate from legacy voicemail systems to Cisco Unified

Communications solutions

Messaging Challenges Today

Cisco Unity Connection

CUE with SRST or

CME

CUE with SRST or

CME

CUE with SRST or

CME

CUE with SRST or CME

CUE withSRST or CME

CUE with SRST or

CME

Cisco Unity

Cisco Unified Messaging Gateway Solution

Unified Messaging

Network

Cisco UnityCisco ISR with CUE

Each UMG Scales up to 1,000 CUE’s Central CUE

(Upto 10 sites)CME

UMG

Cisco Public 18© 2007 Cisco Systems, Inc. All rights reserved.

CUCME/CUE “Final” Solution

PSTN

BRANCH “A”

Voice/DataNetwork

PSTN

BRANCH “B”

V

Voice Gateway

WAN router

HEADQUARTERSUMG

GKVoice

CUCME/CUE CUCME/CUE

• Build Slow

• Dial anyone

• Share VM

• Manage centrally

FAXFAX

Cisco Public 19© 2007 Cisco Systems, Inc. All rights reserved.

OPTION - CUCME with centralized voicemail

PSTN

BRANCH “A”

Voice/DataNetwork

PSTN

BRANCH “B”

CUCME

WAN router

HEADQUARTERS

Voice

CUCMECUCME

Unityor

UConn

MWI Relay

FAXFAX

Cisco Public 20© 2007 Cisco Systems, Inc. All rights reserved.

Approach Two

Cisco Public 21© 2007 Cisco Systems, Inc. All rights reserved.

Approach Two

Cisco’s Centralized Call-processing model

Cisco Unified Communications Manager

Cisco Unity (or Unity Connection)

Cisco Public 22© 2007 Cisco Systems, Inc. All rights reserved.

How CUCM / Unity (or UConn) fit Criteria

Single PBX

“single” point of mangement

Any call any (unless configured not to)

Simpler dialplan management (dialplan itself still pain)

Single VM for everyone

Easy to integrate voice to 3rd-party PBX, or number of them

More 3rd-party voicemail integrations.

Cisco Public 23© 2007 Cisco Systems, Inc. All rights reserved.

CUCM/Unity - Step One

• 1861/2800/3800 size to # phones1861 (8) to 3845 (250)

PSTN

BRANCH “A”

• Local phones

• CUCM

• Unity

• PSTN trunks Analog VIC

PRI VWIC

Voice/DataNetwork

FAX

Cisco Public 24© 2007 Cisco Systems, Inc. All rights reserved.

CUCM/Unity – Add branch

PSTN

BRANCH “A”BRANCH “B”

Voice/DataNetwork

Move/Add/Change to add a site

FAX• Can drop in remote by adding phones

• Add gateway as/when needed

BRANCH “C”

V

Cisco Public 25© 2007 Cisco Systems, Inc. All rights reserved.

CUCM/Unity – Integrate HQ

PSTN

BRANCH “A”

PSTN

BRANCH “B”

Voice/DataNetwork

FAXFAX

V

Voice Gateway

HEADQUARTERS

Voice

Cisco Public 26© 2007 Cisco Systems, Inc. All rights reserved.

CUCM/Unity – Build Out HQ

PSTN

BRANCH “A”

PSTN

BRANCH “B”

Voice/DataNetwork

V

Voice Gateway

HEADQUARTERS

FAXFAX

Add phones at HQ

Cisco Public 27© 2007 Cisco Systems, Inc. All rights reserved.

PSTN

BRANCH “A”

PSTN

BRANCH “B”

Voice/DataNetwork

V

Voice Gateway

HEADQUARTERS

FAXFAX

CUCM/Unity – “Final” Solution

Cisco Public 28© 2007 Cisco Systems, Inc. All rights reserved.

What about use existing VM only?

Not really possible with CUCMENo SMDI – low chance QSIG (no release transfer)

For CUCM have following options1) Dual connect 3rd-party VM

Box not likely to be set up for dual integration

2) Use QSIG link from CUCM to PBX

Cisco Public 29© 2007 Cisco Systems, Inc. All rights reserved.

Criteria that immediately drive Centralized True UM

Requires Unity w/ customer’s Exchange or Notes

Does not require centralized CUCM

Company-wide PresenceRequires centralized CUCM w/ CUP

“agents any location” Contact Center Requires centralized CUCM and UCC Express or Enterprise, possibly CVP

Cisco Public 30© 2007 Cisco Systems, Inc. All rights reserved.

Q and A

Cisco Public 31© 2007 Cisco Systems, Inc. All rights reserved.