Application Note
Verizon IP Trunking Service: Connecting Cisco Unified Communications
Manager 6.1(2) via the Cisco Unified Border Element using SIP
October 27, 2008
Table of Contents
Introduction ..................................................................................................................................................................................................................................................... 2
System Components ........................................................................................................................................................................................................................................ 3
Hardware Components ............................................................................................................................................................................................................................... 3
Software Requirements............................................................................................................................................................................................................................... 4
Features............................................................................................................................................................................................................................................................ 4
Features Supported ..................................................................................................................................................................................................................................... 4
Features Not Supported .............................................................................................................................................................................................................................. 4
Caveats ....................................................................................................................................................................................................................................................... 5
Call Flow Overview.................................................................................................................................................................................................................................... 6
Example call flow for Voice Calls (g729) .................................................................................................................................................................................................. 6
Example call flow for FAX Calls (g711ulaw) ............................................................................................................................................................................................ 6
Configuration ................................................................................................................................................................................................................................................. 7
Configuration of Cisco Unified Border Element (CUBE 1.2) IOS Version 12.4(20)T.............................................................................................................................. 7
Configuring Cisco Unified Communications Manager ........................................................................................................................................................................ 16
Acronyms ................................................................................................................................................................................................................................................. 30
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Note: Results and technical information in this document were obtained through joint testing of Verizon business and Cisco engineers in Verizon laboratories.
Page 1 of 31
EDCS# 754249
Revision # initial version
Introduction
Service Providers today, such as Verizon, are offering alternative methods to connect to the PSTN via their IP network. Most of these services utilize SIP as the primary
signaling method and a centralized IP to TDM gateway to provide on-net and off-net services. Verizon’s IP Trunking service is an SP offering that allows connection to
the PSTN and may offer the end customer a viable alternative to traditional PSTN connectivity via either Analog or T1 lines. A demarcation device between these
services and customer owned services is recommended. The Cisco Unified Border Element provides demarcation, security, interworking and session management
services.
•
This application note describes how to configure a Cisco Unified Communications Manager (CUCM) 6.1.2 with a Cisco Unified Border Element (CUBE) for
connectivity to Verizon’s SIP trunk service. The deployment model covered in this application note is CPE (CUCM6.1.2/CUBE) to PSTN via the Verizon IP
Trunking Service
•
Testing was performed in accordance with the test plan for the Verizon IP trunking service, and all features were verified.
•
Although this document does not detail the results of the testing performed it provides the essential commands required for interoperability between
CUCM/CUBE and the Verizon IP Trunking Service.
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 2 of 31
Figure 1 IP Trunking Lab Network
System Components
Hardware Components
•
Cisco CUBE 1.2 (IOS image version 12.4(20)T or later)
•
Cisco Unified Border Element is an integrated Cisco IOS Software application that runs on various IOS platforms, follow the link for more details:
http://www.cisco.com/go/cube
•
Packet Voice Data Module (PVDM). You will need to install DSP modules (PVDM) on CUBE if you require MTP, Transcoding or Conference Bridge resources
for codecs other than G.711.
•
CUCM cluster with (2) Cisco MCS 7800 Series server (Cisco Unified Communications Manager)
•
Cisco IP Phones
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 3 of 31
•
Cisco ATA186 device (only needed for FAX, modem, or analog phones)
Software Requirements
•
Cisco Unified Call Manager 6.1.2.1000-13 (6.1(2))
•
Cisco Unified Border Element CUBE version 1.2 (IOS version 12.4(20)T or later. Advanced IP Services feature set was used for this configuration
•
The documented CUBE configuration can be supported with the following IOS feature sets: IP VOICE, SP SERVICES, ADVANCED IP SERVICES,
ADVANCED ENTERPRISE SERVICES, INT VOICE/VIDEO, IPIP GW, TDMIP GW,INT VOICE/VIDEO, IPIPGW, TDMIP GW AES
•
Consult your Cisco representative for the correct IOS image for the specific application and Device Unit License and Feature License requirements for CUCM
and CUBE.
Features
Features Supported
•
Voice calls using G.729 codec
•
RFC3261 generic feature Support
•
Locating SIP servers via DNS SRV and DNS A Records
•
Early Media Cut-Through with DO to EO
•
Calling party number presentation and privacy (P-Asserted Identity)
•
FAX using G711ulaw passthrough
•
DTMF as RFC2833 NTE (named telephone events) when a compressed audio codec is used
•
CUBE: performs Delay-Offer-to-Early-Offer transcoding of an initial SIP INIVTE from CUCM without SDP
Features Not Supported
•
CUCM/CUBE Codec negotiation of G.726
•
T.38 Fax relay is not supported by Verizon IP Trunking Service
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 4 of 31
Caveats
•
A conference bridge (CFB) resource on CUBE is required in order for a CUCM IP phone to initiate a three-way conference between G729 media end-points. See
configuration section for details.
•
Along with SIP INVITE with early-offer Verizon requires the support of early media for outbound G729 calls. It is necessary to enable PRACK (REL1XX
response) on the call leg between CUCM and CUBE. See configuration section for details.
•
Verizon’s IP Trunking Service only supports G711ulaw codec for FAX calls. G.711 fax passthrough is the supported FAX transport method for the Verizon IP
Trunking Service. See configuration section for details
•
CUCM can only support a single codec between the end device (i.e. IP Phone, ATA) and the SIP trunk. A workaround for this used during testing was to create
multiple Regions and Device pools in order to control the codec selection prior to being presented to the SIP trunk. The end devices were configured with a
specific Device Pool based on the codec used for offnet calls. See configuration section for details
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 5 of 31
Call Flow Overview
The same SIP trunks are utilized between CUCM to CUBE for both Voice and FAX offnet calls. However, the call type (i.e., Voice vs. FAX) must be differentiated to
ensure the desired codec is used. This delineation is achieved by performing digit manipulation at the RL (Route List) prior to the call being delivered to the RG.
Each type of device (i.e., IP Phones vs analog devices for FAX) will have separate RPs (Route-Patterns) that belongs to their respective partition. The route patterns will
then route the calls to the specified RL.
The RL is used to distinguish a Voice call from a FAX call by manipulating the called party numbers (a leading 9 for Voice and an 8 for FAX). After the digit
manipulation, the Route Lists forward the calls to their respective RG and the RG routes the call to the SIP trunks.
The SIP trunks are the same for ALL calls from CUCM to CUBE.
Example call flow for Voice Calls (g729)
CUBE
Route
Pattern
9@
For Voice Calls
CUCM Cluster
Route
List
Route SIP
Group Trunk
CUBE 1
VZ
VoIP
CUBE
No digits stripped on
Voice calls in CUCM
CUBE 2
9 is stripped in CUBE
for Voice calls
Example call flow for FAX Calls (g711ulaw)
A
CUCM Cluster
CUBE
Route
Pattern
9@
For FAX Calls
Route
List
9 is stripped on FAX calls
in CUCM and replaced
with 8
Route
Group
SIP
Trunk
CUBE 1
VZ
VoIP
CUBE
CUBE 2
8 is stripped in CUBE
for FAX calls
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 6 of 31
Configuration
Configuration of Cisco Unified Border Element (CUBE 1.2) IOS Version 12.4(20)T
Critical commands are marked in Bold with footnotes at bottom of the page
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service sequence-numbers
!
hostname cube.1.3825
!
boot-start-marker
boot-end-marker
!
card type t1 2 1
logging message-counter syslog
logging buffered 100000
no logging console
enable password XXXX
!
no aaa new-model
no network-clock-participate slot 2
no network-clock-participate wic 0
!
dot11 syslog
ip source-route
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.0 192.168.0.100
!
!
!
1
ip dhcp pool IPPHONES
network 192.168.0.0 255.255.255.0
1
(Optional ) DHCP Service: automatically assign IP address and TFTP server configuration to Phones
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 7 of 31
default-router 192.168.0.10
option 150 ip 192.168.0.6
!
!
ip cef
!
!
ip domain name SIP.Domain.com
ip name-server X.X.X.X---SIP DNS Server
!
no ipv6 cef
multilink bundle-name authenticated
!
!
!
Voice-card 0
dspfarm
dsp services dspfarm
!
Voice-card 2
dspfarm
!
!
Voice service voip
2
allow-connections sip to sip
FAX protocol pass-through g711ulaw
h323
sip
3
early-offer forced
4
midcall-signaling passthru
!
!
Voice class codec 1
codec preference 1 g729r8 bytes 20
codec preference 2 g711ulaw bytes 160
2
Allow SIP to SIP call processing
3
Use this command to forcefully configure a Cisco Unified Border Element to send a SIP invite with SDP on the Out-Leg (OL), Delayed-Offer
to Early-Offer for SIP calls.
4
Enables support for SIP Supplementary Services (Only used for SIP-to-SIP Calls)
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 8 of 31
!
!
!
!
!
voice translation-rule 8
rule 2 /^8\(.*\)/ /\1/
!
voice translation-rule 9
rule 2 /^9\(.*\)/ /\1/
!
!
5
voice translation-profile DIGITSTRIP-8
translate called 8
!
6
voice translation-profile DIGITSTRIP-9
translate called 9
!
!
!
!
!
!
!
!
!
!
username cisco privilege 15 secret <XXXX>
archive
log config
hidekeys
!
!
!
!
!
!
ip ssh version 2
!
5
6
Strip the leading “8” from outgoing called number
Strip the leading “9” from outgoing called number
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 9 of 31
!
!
!
interface GigabitEthernet0/0
7
description CUBE inside interface
ip address 192.168.0.X 255.255.255.0
ip virtual-reassembly
load-interval 30
duplex auto
speed auto
media-type rj45
!
interface GigabitEthernet0/1
description CUBE outside interface
ip address X.X.X.X 255.255.255.X
ip virtual-reassembly
load-interval 600
duplex auto
speed auto
media-type rj45
!
ip route 0.0.0.0 0.0.0.0 X.X.X.X
no ip http secure-server
!
!
ip rtcp report interval 10000
!
!
!
!
!
!
!
!
control-plane
!
call threshold global cpu-avg low 68 high 75
call threshold global total-mem low 75 high 85
8
call threshold global total-calls low 9 high 11
7
8
No SIP bind commands configured, SIP is sourced from both interfaces
Global Call Admission Control based on Resource utilization
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 10 of 31
!
!
!
!
9
Voice-port 0/1/0
no non-linear
playout-delay maximum 120
playout-delay nominal 15
playout-delay minimum low
timeouts interdigit 2
timeouts call-disconnect 3
timing digit 300
caller-id enable
!
Voice-port 0/1/1
!
!
sccp local GigabitEthernet0/0
sccp ccm 192.168.0.6 identifier 2 priority 2 version 5.0.1
sccp ccm 192.168.0.4 identifier 5 priority 1 version 5.0.1
sccp
!
sccp ccm group 10
associate ccm 5 priority 1
associate ccm 2 priority 2
associate profile 12 register CON001193484810
!
10
dspfarm profile 12 conference
description conference bridge
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
codec g729r8
codec g729br8
maximum sessions 10
associate application SCCP
!
!
9
Optional FXS port for FAX devices connected directly to the CUBE
DSP resources for Conferencing registered with CUCM cluster
10
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 11 of 31
!
dial-peer Voice 10 pots
description dial '9' for outbound calls
preference 1
service session
destination-pattern 10XX
FAX rate disable
port 0/1/0
!
dial-peer Voice 100 voip
description OUTBOUND G729 Voice SIP calls to VzB
11
translation-profile outgoing DIGITSTRIP-9
12
destination-pattern 9T
Voice-class codec 1
13
Voice-class sip early-offer forced
session protocol sipv2
session target sip-server
14
dtmf-relay rtp-nte
no vad
!
dial-peer Voice 101 voip
description INBOUND G729 Voice SIP calls from VzB
Voice-class codec 1
session protocol sipv2
session target sip-server
15
incoming called-number 1...
dtmf-relay rtp-nte
no vad
!
11
12
Strip the leading “9” from outgoing called number
Match on outbound calls from CUCM with leading “9”
13
Use this command to forcefully configure a Cisco Unified Border Element to send a SIP invite with SDP on the Out-Leg (OL), Delayed-Offer
to Early-Offer for SIP calls.
14
Forwards DTMF tones by using RTP with the Named Telephone Event (NTE) payload type.
15
Enables CUBE to set configuration parameters to incoming calls based on the received called number. This ensures that both legs of the SIP
call have matching CODECs
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 12 of 31
!
dial-peer Voice 200 voip
description inbound FAX dial peer from VZ
session protocol sipv2
session target sip-server
16
incoming called-number 1018
17
codec g711ulaw
18
FAX rate disable
no vad
!
dial-peer Voice 201 voip
description outbound FAX calls to VZ
19
translation-profile outgoing DIGITSTRIP-8
20
destination-pattern 8T
Voice-class sip early-offer forced
session protocol sipv2
session target sip-server
codec g711ulaw
FAX rate disable
no vad
!
dial-peer Voice 300 voip
description To/From CUCM subscriber for FAX Calls
preference 2
destination-pattern 1018
session protocol sipv2
session target ipv4:192.168.0.4
21
incoming called-number 8T
16
Match on inbound call-leg for FAX calls. This ensures that both legs of the SIP call have matching CODECs.
17
CODEC is set on dial-peer to force use of g711ulaw for FAX calls.
18
Disables FAX relay transmission capability. FAX-Passthrough is the supported FAX method.
19
Strip leading “8” from outbound FAX calls before sending to VZ
20
Match outbound FAX calls from CUCM cluster with leading “8”
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 13 of 31
codec g711ulaw
FAX rate disable
no vad
!
dial-peer Voice 301 voip
description To/From CUCM publisher for FAX Calls
preference 5
destination-pattern 1018
session protocol sipv2
22
session target ipv4:192.168.0.6
incoming called-number 8T
codec g711ulaw
FAX rate disable
no vad
!
dial-peer Voice 401 voip
description To/From CUCM subscriber for Voice
preference 2
destination-pattern 1...
Voice-class codec 1
session protocol sipv2
session target ipv4:192.168.0.4
23
incoming called-number 9T
FAX rate disable
no vad
!
dial-peer Voice 411 voip
description To/From CUCM publisher for Voice
preference 5
destination-pattern 1...
Voice-class codec 1
session protocol sipv2
24
session target ipv4:192.168.0.6
21
Enables CUBE to set configuration parameters to outgoing calls based on the received called number. This ensures that both legs of the SIP
call have matching CODECs
22
Multiple SIP trunks configured for redundant connections to the CUCM cluster
23
Enables CUBE to set configuration parameters to outgoing calls based on the received called number. This ensures that both legs of the SIP
call have matching CODECs
24
Multiple SIP trunks configured for redundant connections to the CUCM cluster
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 14 of 31
incoming called-number 9T
dtmf-relay rtp-nte
no vad
!
!
sip-ua
retry invite 2
retry bye 2
retry cancel 2
25
sip-server dns:sip.server.com
g729-annexb override
!
line con 0
line aux 0
line vty 0 4
!
scheduler allocate 20000 1000
end
Configuring Cisco Unified Communications Manager
25
SIP Proxy FQDN name for outbound SIP calls to VZ
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 15 of 31
Early-Media Cut-thru : Enable PRACK on CUCM
PRACK- Provisional Acknowledgement to a Session not yet established
•
Purpose is to acknowledge progress information on a requested process
•
The INVITE Includes a Require header stipulating the UAC wants a reliable provisional response
SIP Rel1XX Enabled: This parameter determines whether all SIP provisional responses (other than 100 Trying messages) get sent reliably to the remote SIP endpoint.
If this parameter is disabled, Cisco CallManager does not acknowledge or confirm 18X messages. Valid values specify True (acknowledge 18X messages with PRACK)
or False (do not acknowledge 18X messages with PRACK).
CUCM Administrator>System>Service Parameters
Change the SIP Rel1XX Enabled from the default of False to True
Note: No changes are required on the CUBE. The CUBE supports PRACK by default.
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 16 of 31
Media Resource Group List:
List of Media Resource Groups configured for the SIP Trunk MRGL
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 17 of 31
Media Resource Group:
Configured Conference Bridge resource associated with DSP resources configured on CUBE
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 18 of 31
CODEC Selection using Device Pools and Regions
All Voice calls through the SIP trunk should use G.729 and FAX devices should use G.711. Note in the configuration below, there are two regions. Calls between the
“Default” and “Offsite” region will use G.729 and calls between “Default” and “Offsite” use G.711. Applying this configuration to our testbed, the SIP trunk is placed in
a Device Pool with the “Offsite” region, and phone devices should be placed in a Device Pool that with the “Default” region. Devices used for analog FAX should use a
Device Pool with the “Offsite” region. Devices that belong to the same region are configured to use the G.711 codec
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 19 of 31
List of Device pools and the associated Regions
List of Phones and ATA Devices:
The Device Pools selected determine the codec used for Offnet calls
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 20 of 31
SIP Trunk Configuration:
The Offsite Device Pool is configured for codec negotiation and the SIP_Trunk_MRGL is selected for Conference Bridge resources.
required Not Selected
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 21 of 31
Note: MTP
Route Group Configuration:
Both SIP Trunks are members of the same Route Group
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 22 of 31
Route List for Voice:
The previously defined RG is selected in the Voice RL
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 23 of 31
Route List Details for Voice:
No Digits are discarded for offnet Voice calls.
The leading “9” is preserved when the call is forwarded to the CUBE, this allows the CUBE to differentiate the call as Voice and use the corresponding G729 CODEC.
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 24 of 31
Route List for FAX:
The previously defined RG is selected in the FAX RL (similar to Voice RL)
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 25 of 31
Route List Details for FAX:
The “9” is stripped from the called party number and replaced with an “8”.
This dial plan configuration ensures that the user only needs to dial a “9” for Voice and FAX off-net calls.
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 26 of 31
Route Pattern for Voice:
This Route Pattern is in the Voice partition and is serviced by the Voice RL (No Digits are stripped)
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 27 of 31
Route Pattern for FAX:
This Route Pattern is in the FAX partition and is serviced by the FAX RL (No Digits are stripped)
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 28 of 31
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 29 of 31
Acronyms
Acronym
Definitions
SIP
Session Initiation Protocol
SCCP
Skinny Client Control Protocol
TDM
Time Division Multiplexing
CUCM
Cisco Unified Communications Manager
CUBE
Cisco Unified Border Element
Important Information
THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE.
ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED
WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF
ANY PRODUCTS.
IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL
DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR
INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 30 of 31
Corporate
Headquarters
European
Headquarters
Americas
Headquarters
Asia Pacific
Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
FAX:
408 526-4100
Cisco Systems International
BV
Haarlerbergpark
Haarlerbergweg 13-19
1101 CH Amsterdam
The Netherlands
www-europe.cisco.com
Tel: 31 0 20 357 1000
FAX:
31 0 20 357 1100
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
www.cisco.com
Tel: 408 526-7660
FAX:
408 527-0883
Cisco Systems, Inc.
Capital Tower
168 Robinson Road
#22-01 to #29-01
Singapore 068912
www.cisco.com
Tel: +65 317 7777
FAX: +65 317 7799
Cisco Systems has more than 200 offices in the following countries and regions. Addresses, phone numbers, and FAX numbers are listed on
the Cisco Web site at www.cisco.com/go/offices.
Argentina • Australia • Austria • Belgium • Brazil • Bulgaria • Canada • Chile • China PRC • Colombia • Costa Rica • Croatia • Czech
Republic • Denmark • Dubai, UAE • Finland • France • Germany • Greece • Hong Kong SAR • Hungary • India • Indonesia • Ireland •
Israel • Italy • Japan • Korea • Luxembourg • Malaysia • Mexico • The Netherlands • New Zealand • Norway • Peru • Philippines •
Poland • Portugal • Puerto Rico • Romania • Russia • Saudi Arabia • Scotland • Singapore • Slovakia • Slovenia • South Africa • Spain •
Sweden • Switzerland • Taiwan • Thailand • Turkey Ukraine • United Kingdom • United States • Venezuela • Vietnam • Zimbabwe
© 2007 Cisco Systems, Inc. All rights reserved.
CCVP, the Cisco Logo, and the Cisco Square Bridge logo are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn is a service mark of
Cisco Systems, Inc.; and Access Registrar, Aironet, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, CCSP, Cisco, the Cisco Certified Internetwork Expert logo,
Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step,
Follow Me Browsing, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, iPhone, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, iQuick
Study, LightStream, Linksys, MeetingPlace, MGX, Networking Academy, Network Registrar, Packet, PIX, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet,
StackWise, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and
certain other countries.
All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship
between Cisco and any other company. (0612R)
Printed in the USA
© 2008 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com
Page 31 of 31
">
