Rich Gore
Cisco@Work Case Study:
IP Telephony / Extension Mobility
Cisco Information Technology
November 3, 2003
© 2003 Cisco Systems, Inc. All rights reserved.
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Overview
• Challenge
Not enough desk space for employees in certain locations. Need to
support personal phone extensions even if employees use
different offices in different cities.
• Solution
Provide “virtual” desks and phones instead of “fixed” desks and
phones by adding a built-in feature to the Cisco® CallManager
software. Allows employees to configure any Extension Mobilityenabled IP phone as their own.
• Results
Cisco began a phased deployment of Extension Mobility in EMEA
in 2000. Includes 7,600 employees in all 65 locations throughout
Western Europe, the Middle East, and South Africa use Extension
Mobility.
• Next Steps
Deployment to more sites, larger regions.
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© 2003 Cisco Systems, Inc. All rights reserved.
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Challenge—Desk Sharing
• Not enough desk space for
employees in certain locations
Do not want to rent more office
space, especially in high-rent
districts.
• Make desk sharing practical
Cisco® needed a way for employees
to keep their personal phone
extensions even if they were not
assigned a specific desk to use
everyday.
• Ensure productivity
Employees need to access their own
telephony feature sets, such as
speed-dial numbers, and services
such as Follow-Me, Personal
Assistant, and Unified Messaging.
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© 2003 Cisco Systems, Inc. All rights reserved.
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Solution—Extension Mobility
• Built-in feature of Cisco® CallManager Software
Allows employees to sit at any available desk, press
the Service Key on the Cisco IP Phone 7960, and log
in by entering their CallManager username and PIN.
The phone then instantly configures according to the
user’s profile, including direct telephone number and
characteristics such as speed-dial information and
services.
The administrator uses the CallManager interface to
define the phone by adding its MAC address and the
URL of the login service.
• User profile
The phone retains the user profile until the user logs
off or another user logs on. The administrator can
specify a maximum logon duration, such as 12 hours,
after which phones are automatically logged off.
• All IP phones served by a single CallManager
cluster
* Cisco IP Phone 7940 and 7960
Access from any IP phone* in the CallManager
cluster, from desk, co-worker’s office, conference
room, or lobby phone.
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© 2003 Cisco Systems, Inc. All rights reserved.
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Results—Cost Savings
• Cost savings
The chief benefit of Extension Mobility is the
cost savings that arise from office sharing.
By not renting additional office space and
furniture for every employee, we are saving
real dollars.
• Departmental budgets
Departmental budgets go further because
managers can request “virtual” desks and
phones instead of “fixed” desks and phones.
By totally eliminating MACs, we are saving
hundreds of thousands of dollars each year
in our IT budget. The money saved becomes
available for other projects.
• No additional work added
Total cost of ownership for Extension
Mobility is low. The administrative work
required to create a user profile is equal to
the work required when the user has a
dedicated phone.
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© 2003 Cisco Systems, Inc. All rights reserved.
Extension Mobility Architecture
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Next Steps—Summary
• Deployment to more sites
Presently planning Extension Mobility’s introduction to the Pleasanton,
California and Scotts Valley, California campuses. Cisco® will deploy
Extension Mobility in Beijing and Shanghai during late 2003.
By early 2004 we will have one Cisco CallManager cluster serving all of
Europe, one for the Middle East, and one for South Africa, supporting
Extension Mobility.
• Cached user IDs
Extension Mobility caches the most recently entered user ID for the
convenience of the workers who use the same desk. We would like to see
Extension Mobility enhanced to cache several user IDs.
• Charge back
Cisco is investigating the business benefits of a telecommunications chargeback model: Each employee’s toll calls (off-net calls) would be billed to their
department. Cisco CallManager software and the Extension Mobility feature
already have the capability to collect the necessary usage information.
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© 2003 Cisco Systems, Inc. All rights reserved.
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Enterprisewide Extension Mobility
• Ultimately, any Cisco®
employee will be able to
log in to an IP phone in
any Cisco office in the
world and receive calls
from callers who dialed
their direct number.
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© 2003 Cisco Systems, Inc. All rights reserved.
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This publication describes how Cisco has benefited from the
deployment of its own products. Many factors may have contributed
to the results and benefits described; Cisco does not guarantee
comparable results elsewhere.
CISCO PROVIDES THIS PUBLICATION AS IS WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING THE IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
Some jurisdictions do not allow disclaimer of express or implied
warranties, therefore this disclaimer may not apply to you.
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© 2003 Cisco Systems, Inc. All rights reserved.
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