cisco catalyst 3550 series switches

Q&A
CISCO CATALYST 3550 SERIES SWITCHES
PROGRAM OVERVIEW
Q. What are the Cisco® Catalyst® 3550 Series Switches?
A. The Cisco Catalyst 3550 Series Switches are a line of enterprise-class, stackable, multilayer switches that provide high
availability, security, and quality of service (QoS) to enhance the operation of the network. With a range of Fast Ethernet
and Gigabit Ethernet configurations, the Cisco Catalyst 3550 Series can serve as both a powerful access-layer switch for
medium-sized enterprise wiring closets and as a backbone switch for midsized networks. For the first time, customers
can deploy networkwide intelligent services, such as advanced QoS, rate-limiting, Cisco security access control lists
(ACLs), multicast management, and high-performance IP routing-while maintaining the simplicity of traditional LAN
switching. Cisco Network Assistant offers centralized management and configuration of the Catalyst 3550 Series to
simplify deployment and ongoing maintenance by using Cisco Smartports technology. Cisco Network Assistant is a PCbased network management application optimized for networks of small and medium-sized businesses (SMBs) with up to
250 users. Through a user-friendly GUI, users can easily apply common services such as configuration management,
®
inventory reports, password synchronization, and Cisco IOS Drag-and-Drop Upgrade across Cisco SMB-class switches,
routers, and access points. Cisco Network Assistant is available at no cost and can be downloaded from Cisco.com.
The Cisco Catalyst 3550-24 PWR Switch can provide a lower total cost of ownership for deployments that incorporate
®
Cisco IP phones and/or Cisco Aironet wireless LAN access points. With up to 15 watts (W) of integrated inline power on
every 10/100 port, the switch provides maximum device support and eases new technology deployments by eliminating
the need for wall power to each IP phone or wireless LAN access point. Additionally, delivering power through the Cisco
Catalyst 3550-24 PWR Switch eliminates the cost for additional electrical cabling that would otherwise be necessary in
wireless LAN and IP phone deployments. Maximum power availability for a converged voice and data network is
attainable when a Cisco Catalyst 3550 Series Switch is combined with the Cisco RPS 675 (RPS 675) for easy protection
against internal power supply failures and an uninterruptible power supply (UPS) system to safeguard against power
outages.
Table 1 shows the complete list of Cisco Catalyst 3550 Series Switches.
Table 1.
Cisco Catalyst 3550 Series Switches
Product Name
Part Number
Cisco Catalyst 3550-48
WS-C3550-48-EMI
Description
● 48 10/100 ports and 2 GBIC-based Gigabit Ethernet ports
● 1 rack unit (RU) stackable, multilayer switch
● Delivers enterprise-class intelligent services to the network edge
● Enhanced Multilayer Software Image (EMI) installed
● Provides advanced IP routing
Cisco Catalyst 3550-48
WS-C3550-48-SMI
● 48 10/100 ports and 2 GBIC-based Gigabit Ethernet ports
● 1 RU stackable, multilayer switch
● Delivers enterprise-class intelligent services and basic IP routing to the network edge
● Standard Multilayer Software Image (SMI) installed, upgradeable to advanced IP routing
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Cisco Catalyst 3550-24
WS-C3550-24-EMI
● 24 10/100 ports and 2 GBIC-based Gigabit Ethernet ports
● 1 RU stackable, multilayer switch
● Delivers enterprise-class intelligent services to the network edge
● EMI installed
● Provides advanced IP routing
Cisco Catalyst 3550-24
WS-C3550-24-SMI
● 24 10/100 ports and 2 GBIC-based Gigabit Ethernet ports
● 1 RU stackable, multilayer switch
● Delivers enterprise-class intelligent services and basic IP routing to the network edge
● SMI installed, upgradeable to advanced IP routing
Cisco Catalyst 3550-24 PWR
WS-C3550-24PWR-EMI
● 24 10/100 ports and 2 GBIC-based Gigabit Ethernet ports
● 1 RU stackable, multilayer switch; integrated inline power
● Delivers enterprise-class intelligent services to the network edge
● EMI installed
● Provides advanced IP routing
Cisco Catalyst 3550-24 PWR
WS-C3550-24PWR-SMI
● 24 10/100 ports and 2 GBIC-based Gigabit Ethernet ports
● 1 RU stackable, multilayer switch; integrated inline power
● Delivers enterprise-class intelligent services and basic IP routing to the network edge
● SMI installed, upgradeable to advanced IP routing
Cisco Catalyst 3550-24 DC
WS-C3550-24-DC-SMI
● 24 10/100 ports and 2 GBIC-based Gigabit Ethernet ports
● 1 RU stackable, multilayer switch, DC powered
● Delivers enterprise-class intelligent services and basic IP routing to the network edge
● SMI installed, upgradeable to advanced IP routing
Cisco Catalyst 3550-24 FX
WS-C3550-24-FX-SMI
● 24 100FX multimode fiber ports and 2 GBIC-based Gigabit Ethernet ports
● 1 RU stackable, multilayer switch
● Delivers enterprise-class intelligent services and basic IP routing to the network edge
● SMI installed, upgradeable to advanced IP routing
Cisco Catalyst 3550-12G
WS-C3550-12G
● 10 GBIC-based Gigabit Ethernet ports and 2 10/100/1000 ports
● 1.5 RU stackable, multilayer Gigabit Ethernet switch
● Delivers enterprise-class intelligent services to the network edge
● Provides advanced IP routing
Cisco Catalyst 3550-12T
WS-C3550-12T
● 10 10/100/1000 ports and 2 GBIC-based Gigabit Ethernet ports
● 1.5 RU stackable, multilayer Gigabit Ethernet switch
● Delivers enterprise-class intelligent services to the network edge
● Provides advanced IP routing
EMI Upgrade Kit
CD-3550-EMI=
● EMI upgrade kit for all standard versions of the Cisco Catalyst 3550-24, Catalyst 3550-24
PWR, Catalyst 3550-24 DC, Catalyst 3550-24 FX, and Catalyst 3550-48 Switches
● Provides advanced IP routing
Q. What is the difference between the EMI and the SMI?
A. The Cisco Catalyst 3550-24, Catalyst 3550-48, and Catalyst 3550-24 PWR switches can be ordered with the SMI or the
EMI. The Cisco Catalyst 3550-24 DC and Catalyst 3550-24 FX can only be ordered with the SMI preinstalled, but as with
all switches running the SMI, they can be upgraded to the EMI version using an EMI upgrade kit. The Cisco Catalyst
3550-12T and Catalyst 3550-12G switches come installed with EMI. The EMI enables a richer set of enterprise-class
features including advanced hardware-based IP unicast and multicast routing, Policy-Based Routing (PBR), and the Web
Cache Communication Protocol (WCCP). Additional details about the differences between the SMI and EMI are provided
later in this Q&A.
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Q. Can I enable static IP routing using the SMI?
A. Yes, there is support for basic IP unicast routing via Static Routes and Routing Information Protocol (RIP) Versions 1 and
2 using the SMI. The EMI provides advanced IP unicast and multicast routing. These advanced routing protocols are
Open Shortest Path First (OSPF), Interior Gateway Routing Protocol (IGRP), Enhanced Interior Gateway Routing
Protocol (EIGRP), Border Gateway Protocol Version 4 (BGPv4), Protocol Independent Multicast (PIM), and PBR.
Q. Is the EMI required to allow Layer 3 and Layer 4 lookups for QoS and security?
A. No. Both the SMI and the EMI allow for Layer 3 and Layer 4 lookups for QoS and security.
Q. Why do I need intelligence at the edge of my network?
A. Networks today are evolving to address four new developments at the network edge:
●
Increase in desktop computing power
●
Introduction of bandwidth-intensive applications
●
Expansion of highly sensitive data on the network
●
Presence of multiple device types, such as IP phones and wireless LAN access points
These new demands are contending for resources with many existing mission-critical applications. As a result, IT
professionals must view the edge of the network as critical to effectively manage the delivery of information and
applications.
As companies increasingly rely on networks as the strategic business infrastructure, it is more important than ever to
ensure their high availability, security, scalability, and control. By adding Cisco intelligent functionality to the wiring closet,
customers can now deploy networkwide intelligent services that address these requirements in a consistent way from the
desktop to the core and through the WAN.
With Cisco Catalyst switches, Cisco helps companies to realize the full benefits of adding intelligent services into their
networks. Deploying capabilities that make the network infrastructure highly available to accommodate time-critical
needs, scalable to accommodate growth, secure enough to protect confidential information, and capable of differentiating
and controlling traffic flows is essential to further optimizing network operations.
Q. Can you provide more details on how an intelligent switch from Cisco will help my network?
A. New applications are requiring higher bandwidth and the need to differentiate and control the traffic flow. Applications
such as ERP (Oracle, SAP, etc.), voice (IP telephony traffic), video (videoconferencing or e-learning applications), and
CAD/CAM require prioritization over less time-sensitive applications such as FTP or e-mail (SMTP). It would be highly
undesirable to have a large file download destined to one port on a wiring closet switch and have quality implications
such as increased latency in voice traffic that is destined to another port on this switch. This condition is avoided by
ensuring that voice traffic is properly classified and prioritized throughout the network. Cisco switches implement superior
QoS to help ensure that network traffic is classified and prioritized, and congestion is avoided.
Q. How does the Cisco Catalyst 3550 Series manage the security needs of a network?
A. With the rise in internal threats to a network, Cisco switches enhance data security through a wide range of features
including Secure Shell (SSH) Protocol, Kerberos, Simple Network Management Protocol Version 3 (SNMPv3), ACLs,
802.1X, 802.1X with VLAN assignment, 802.1X with ACL assignment, 802.1X with voice VLAN, 802.1X with Port
Security, Port Security, Private VLAN Edge, Dynamic Host Configuration Protocol (DHCP) Interface Tracker, MAC
Address Notification, Switched Port Analyzer (SPAN) for Intrusion Detection System (IDS) support, and
RADIUS/TACACS+. Depending on your security needs, the Cisco Catalyst 3550 Series complements devices such as
firewalls, VPNs, and IDSs.
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Q. For security purposes, how can I prevent unauthorized users from accessing my network?
A. The Cisco Catalyst 3550 Series supports 802.1X, which works in conjunction with a RADIUS server to authenticate users
as they access a network. The 802.1X standard is considered port-level security and is commonly used for both wired
and wireless LANs. Additionally, portions of the network can be restricted by using ACLs. Access can be denied based
on Media Access Control (MAC) addresses, IP addresses, or Transmission Control Protocol (TCP)/User Datagram
Protocol (UDP) ports. ACL lookups are done in hardware-thus forwarding and routing performance is not compromised
when implementing ACL-based security. An additional protection method is to use Port Security, which allows only
appropriate users on the network by limiting access to the port based on MAC addresses.
Q. For security purposes, how can I allow mobility of the user base while also ensuring security?
A. 802.1X in conjunction with a RADIUS server allows for dynamic port-based user authentication. 802.1X-based user
authentication can be extended to dynamically assign a VLAN or an ACL based on a specific user regardless of where
the user connects on the network. This intelligent adaptability allows IT departments to offer greater flexibility and mobility
to their stratified user populations. By combining access control and user profiles with secure network connectivity,
services, and applications, enterprises can more effectively manage user mobility and drastically reduce the overhead
associated with granting and managing access to network resources.
Q. For security purposes, how can I monitor or track activities in my network?
A. IDSs are tailored to monitor and track activities in a network. The Cisco Catalyst 3550 Series supports SPAN
enhancements that allow an IDS to take action if an intruder is detected. Additionally, the Cisco Catalyst 3550 Series can
complement this through features such as MAC Address Notification, which will send an alert to a management station
so that network administrators know when and where users came on to the network and can take appropriate actions.
The DHCP Interface Tracker (Option 82) feature will track where a user is physically connected on a network by providing
both switch and port ID to a DHCP server.
Q. For security purposes, how do I protect administration passwords and traffic going to the switch during
configuration or troubleshooting?
A. To protect administration traffic during the configuration or troubleshooting of a switch (such as passwords or device
configuration settings), the best approach is to encrypt the data. SSH, Kerberos, and SNMPv3 (crypto version) provide
encryption of data during Telnet and SNMP sessions. These features require the use of an image with strong encryption
technology. Because of export restrictions, this image does not ship preinstalled on the switches and must be
downloaded from a special area on Cisco.com.
Q. Are the Cisco Catalyst 3550 Series Switches available with Web-based setup?
A. The Cisco Catalyst 3550 Series Switches will support Express Setup with the next Cisco IOS Software release. This
feature is designed to simplify the initial “out-of-the-box” deployment of Cisco Catalyst fixed-configuration switches. In the
past, users had to connect a computer to the console port of the switch (using a special rollover cable), launch a terminal
emulation program, and then configure an IP address, switch name, password, etc. using the CLI. With Express Setup,
the user can now simply connect a PC with an Ethernet cable into any port on the switch, hold the "mode" button to
activate Express Setup, and launch a Web browser. The switch can then be set up using a single Webpage.
Q. What gigabit interface converters (GBICs) are supported on the Cisco Catalyst 3550 Series?
A. The Cisco Catalyst 3550 Series supports the following Cisco GBICs: 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX,
1000BASE-T, 1000BASE-CWDM, and the Cisco GigaStack® Stacking GBIC.
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Q. Is there any limit to the number of a particular GBIC or combination of different GBICs that can be used on a
Cisco Catalyst 3550 Series Switch?
A. No. Users can populate all the GBIC ports of any Cisco Catalyst 3550 Series Switch with the same GBIC or with a
combination of different GBICs.
Q. Does the Cisco Catalyst 3550 Series have redundant power system (RPS) support?
A. Yes, the Cisco RPS 300 supports all Cisco Catalyst 3550 Series Switches except the Cisco Catalyst 3550-24 PWR. The
new RPS 675 supports the Cisco Catalyst 3550-24 PWR and all other Cisco Catalyst 3750, Catalyst 3550, Catalyst
2970, and Catalyst 2950 Series models. The RPS 675 does not support Cisco Catalyst 3524-PWR XL. The Cisco RPS
300 and RPS 675 provide superior internal power-source redundancy for up to six Cisco networking devices, resulting in
improved fault tolerance and network uptime. Please see the Cisco RPS 300 Switch Compatibility matrix and the Cisco
RPS 675 Switch Compatibility matrix for a list of Cisco devices supported by the RPS 300 and RPS 675.
RPS 300: http://www.cisco.com/en/US/products/hw/routers/ps2883/prod_release_note09186a00800d9d95.html
RPS 675: http://www.cisco.com/en/US/products/hw/routers/ps2883/ps5066/index.html
Q. Does the Cisco Catalyst 3550 Series support Inter-Switch Link (ISL) virtual LAN (VLAN) trunking?
A. Yes, the Cisco Catalyst 3550 Series supports both 802.1Q trunking and ISL trunking. VLAN trunks can be created from
any port using either standards-based 802.1Q tagging or the Cisco ISL VLAN architecture.
Q. Does it cost more for a Layer 3 or special-features license?
A. The Cisco Catalyst 3550-24 EMI, Catalyst 3550-48 EMI, Catalyst 3550-24 PWR EMI, Catalyst 3550-12T, and Catalyst
3550-12G are loaded with the EMI, so all feature license fees are part of the standard list price. However, the Cisco
Catalyst 3550-24 SMI, Catalyst 3550-48 SMI, Catalyst 3550-24 PWR SMI, Catalyst 3550-24 DC SMI, and Catalyst 355024 FX SMI switches are loaded with the SMI; these switches can be upgraded to the EMI with the purchase of the EMI
upgrade kit (part number CD-3550-EMI=).
Q. What features are only supported on the EMI?
A. The following features and functionality are only supported with the EMI:
●
●
Advanced IP routing protocols for load balancing and constructing scalable LANs:
◦
OSPF
◦
IGRP and EIGRP
◦
BGPv4
WCCP to allow switch interaction with a cache for the purpose of redirecting content requests to a cache and
performing basic load balancing across multiple caches
●
PBR to allow specific policies to be implemented by causing selective traffic to take different paths
●
PIM for IP multicast routing within a network that enables the network to receive the multicast feed requested and for
switches not participating in the multicast to be pruned; support for PIM sparse mode (PIM SX), PIM dense mode (PIM
DX), and PIM sparse-dense mode
●
Distance Vector Multicast Routing Protocol (DVMRP) tunneling for interconnecting two multicast-enabled networks
across non-multicast networks
Q. Are there five packs or multipacks for the Cisco Catalyst 3550 Series Switches?
A. No.
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COMPARISON TO OTHER CISCO CATALYST FIXED-CONFIGURATION SWITCHES
Q. Are there plans to discontinue the Cisco Catalyst 3500 XL Series Switches?
A. The Cisco Catalyst 3550 and Catalyst 2950 Series Switches have replaced the majority of Cisco Catalyst 3500 XL Series
Switches. The end of sale for the Cisco Catalyst 3512 XL, Catalyst 3524 XL, and Catalyst 3548 XL was July 27, 2002.
Information is available at: http://www.cisco.com/en/US/products/hw/switches/ps637/prod_eol_notices_list.html
The end of sale for the Cisco Catalyst 3524-PWR XL was August 12, 2004. Information is available at:
http://www.cisco.com/en/US/products/hw/switches/ps637/prod_eol_notices_list.html
The end of sale for the Cisco Catalyst 3508G XL was September 17, 2005. Information is available at:
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps637/prod_end-of-life_notice0900aecd8021a948.html
Q. What is the positioning of the Cisco Catalyst 3550 Series relative to the Cisco Catalyst 3500 XL Series?
A. The Cisco Catalyst 3550 Series Switches are expected to be deployed in similar topological positions in the network as
the Cisco Catalyst 3500 XL Series Switches. These positions include the access layer and network backbone of
enterprise wiring closets and branch office networks. The Cisco Catalyst 3550 Series is ideal for those networks requiring
multilayer services such as IP routing, advanced QoS, multicast management, and security ACLs.
Q. How is the Cisco Catalyst 2970 Series positioned relative to the Cisco Catalyst 3550 Series?
A. The Cisco Catalyst 2970 Series Switches are standalone Gigabit Ethernet switches, whereas the Cisco Catalyst 3550
Series comprises stackable 10/100 switches with GBIC-based gigabit connectivity for the access layer and gigabit
switches for the network backbone. Cisco Catalyst 3550 Series customers who are migrating to gigabit should first
consider their needs for IP routing, fiber uplinks, increased availability and scalability, ease of use, and stacking, which
are all offered in the Cisco Catalyst 3550 Series.
Q. What is the positioning of the Cisco Catalyst 3550 Series relative to the Cisco Catalyst 2950 Series?
A. The Cisco Catalyst 3550 Series and the Cisco Catalyst 2950G switches are capable of delivering intelligent services
such as advanced QoS, rate-limiting, security filtering, and multicast management to the network edge. The Cisco
Catalyst 3550 Series Switches are the premium fixed-configuration switches and offer greater product family breadth, a
richer set of enterprise-class features, and a platform that supports dynamic, hardware-based IP routing.
Q. Are the Cisco Catalyst 3550 Series Switches compatible with the Cisco Catalyst 3500 XL Series Switches?
A. The Cisco Catalyst 3550 Series Switches are completely compatible with the Cisco Catalyst 3500 XL Series Switches.
Committed to protecting customers' investments in desktop switches, Cisco Systems® has ensured that all desktop
switching platforms including the Cisco Catalyst 3750, Catalyst 3550, Catalyst 2970, Catalyst 2950, Catalyst 2940,
Catalyst 3500 XL, Catalyst 2900 XL, Catalyst 2900 LRE XL, and Catalyst 1900 Series can be mixed and managed using
the Cisco Network Assistant Software. Additionally, the GBIC ports on the Cisco Catalyst 3550 Series support the Cisco
GigaStack GBIC for point-to-point or cascade stacking configurations. These investments deliver long-term value for
Cisco customers.
Q. What is the positioning of the Cisco Catalyst 3550 Series relative to the Cisco Catalyst 4908G-L3 and 2948G-L3?
A. The Cisco Catalyst 3550 Series Switches are next-generation, fixed-configuration multilayer switches. Cisco expects
customers to migrate to the Cisco Catalyst 3550-12G from the Catalyst 4908G-L3, and to the Catalyst 3550-48 from the
Catalyst 2948G-L3. This migration is expected because the Cisco Catalyst 3550 Series Switches are able to provide
some features not supported by the Catalyst 4908G-L3 and Catalyst 2948G-L3 switches-such as support for 802.1p,
802.1p-to-DSCP mapping, and SPAN-at a significantly lower price per port.
Q. Does the Cisco Catalyst 3550-24 PWR Switch support the 802.3af inline power standard?
A. No, this switch supports Cisco Pre-Standard Power over Ethernet. The Catalyst 3750 Series and Catalyst 3560 Series
support the Cisco Pre-Standard Power over Ethernet and IEEE 802.3af Power over Ethernet.
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SOFTWARE UPDATES
Q. For which fixed-configuration and stackable Cisco Catalyst switch product series can I obtain a “no additional
cost” Cisco IOS Software update?
A. Cisco offers ongoing Cisco IOS Software updates for the following fixed-configuration and stackable Cisco Catalyst
switch product series at no additional cost. For the life of the product, updates within the Cisco IOS package purchased
(such as LAN Base, IP Base, IP Services, etc.) will be made available to customers.
●
Cisco Catalyst Express 500 Series Switches
●
Cisco Catalyst 2900 XL Series Switches
●
Cisco Catalyst 2940 Series Switches
●
Cisco Catalyst 2948G-GE-TX Series Switch
●
Cisco Catalyst 2950 Series Switches
●
Cisco Catalyst 2950 LRE Series Switches
●
Cisco Catalyst 2955 Series Switches
●
Cisco Catalyst 2960 Series Switches
●
Cisco Catalyst 2970 Series Switches
●
Cisco Catalyst 3500 XL Series Switches
●
Cisco Catalyst 3550 Series Switches
●
Cisco Catalyst 3560 Series Switches
●
Cisco Catalyst 3750 Series Switches
●
Cisco ME 2400 Series Ethernet Access Switches
●
Cisco ME 3400 Series Ethernet Access Switches
Note that upgrades are different from updates. For example, an upgrade from the IP Base Package to the IP Services
Package provides significant new functions; therefore, this upgrade requires the purchase of a software license upgrade.
Updates are incremental software features and bug fixes that are released within a Cisco IOS package for which you own
a license.
This statement supersedes any previous warranty or software statement and is subject to change without notice.
Q. How do I get a ”no additional cost” Cisco IOS Software update for my fixed-configuration and/or stackable Cisco
Catalyst switch?
A. Customers that own a software license for any of the aforementioned fixed-configuration and/or stackable Cisco Catalyst
switch product series (listed previously) may obtain a software update at the Cisco.com Website.
Go to the following URL: http://tools.cisco.com/support/downloads/pub/MDFTree.x?butype=switches or from
http://www.cisco.com click on “Downloads” and select “Switch Software”. To download software, you will be required to
log in using your Cisco.com username and password. If you do not have a Cisco.com username, you can obtain one by
clicking on “Register” at the top of any Cisco.com Webpage (http://tools.cisco.com/RPF/register/register.do).
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WARRANTY AND SERVICE
Limited Lifetime Warranty
The hardware warranty available on Cisco Catalyst 3750, Catalyst 3560, Catalyst 3550, Catalyst 2970, Catalyst 2960,
Catalyst 2950, Catalyst 2940, Catalyst Express 500, Catalyst 3500 XL, and Catalyst 2900 XL Series Switches is the Limited
Lifetime Hardware Warranty. This warranty automatically comes with the purchase of eligible Cisco Catalyst products, free of
charge. Additionally, it offers free advance replacement of products within 10 business days. For details on the Limited
Lifetime Hardware Warranty, visit: http://www.cisco.com/univercd/cc/td/doc/es_inpck/lh2ben__.htm
Q. What type of service and support is available for the Cisco Catalyst 3550 Series?
A. A full complement of lifecycle service and support is available for the Cisco Catalyst 3550 Series. From implementation to
operation and optimization, Cisco offers Technical Support Service and Advanced Service delivered either directly by
Cisco or through one of its best-in-class partners.
TECHNICAL SUPPORT SERVICE
Technical Support Service is available through Cisco SMARTnet® service and SMARTnet Onsite. Cisco SMARTnet service
augments the resources of your operations staff by providing them with access to a wealth of expertise, both online and via
telephone, and a range of hardware Advance Replacement options. Cisco SMARTnet Onsite complements the hardware
Advance Replacement feature by adding the services of a field engineer, services that can be critical for those locations
where staffing is insufficient or unavailable to replace parts. For more information on Cisco SMARTnet service, visit:
http://www.cisco.com/en/US/products/svcs/ps3034/ps2827/ps2978/serv_group_home.html
PRODUCT AND CONTACT INFORMATION
Q. Where can I find technical and product specifications and other additional information on the Cisco Catalyst
3550 Series?
A. For a variety of product literature including data sheets and product specifications, please refer to the Cisco Catalyst
3550 Series Website at: http://www.cisco.com/go/catalyst3550
FOR MORE INFORMATION
For more information about the Cisco IP Phone 7905G, visit
http://www.cisco.com/en/US/products/hw/phones/ps379/ps1851/index.html or contact your local account representative.
For more information about the Cisco End-of-Life Policy, go to: http://www.cisco.com/en/US/products/prod_end_of_life.html.
To subscribe to receive end-of-life/end-of-sale information, go to: http://www.cisco.com/cgi-bin/Support/FieldNoticeTool/fieldnotice.
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Printed in USA
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