Cisco Catalyst 4200 Series Switches

Catalyst 4224 Access Gateway Switch

Data Sheet

Catalyst 4200

Access Gateway Switch

The Cisco Catalyst® 4200 Access Gateway Switch extends data, voice, and video to the small branch office in unprecedented fashion. By delivering WAN-routing, Ethernet-switching, and voice-gateway capabilities into a two-rack-unit (2U) chassis, deploying converged IP communications has never been easier or more cost-effective. (See Figure 1.)

Figure 1: Catalyst 4200 Access Gateway Switch

The Catalyst 4200 has twenty-four 10/100 switched Ethernet ports with integrated inline power and advanced quality-of-service (QoS) features that make it an ideal choice for extending IP telephony networks to small branch offices of up to 24 users.

The Catalyst 4200 includes an integrated eight-port foreign-exchange-station (FXS) module to support devices such as analog phones, fax machines, and modems. The Catalyst 4200 shares modular voice- and WAN-interface-card interfaces with the Cisco 1700, 2600, 3600, and Catalyst 4000 Access Gateway Module platforms, protecting customer investment, streamlining operations costs associated with sparing of parts, and simplifying training.

The Catalyst 4200 can be deployed in several ways, including:

  • Single-box solution for small branch offices deploying converged IP telephony; the Catalyst 4200 provides switching, IP routing, and Public-Switched-Telephone-Network (PSTN) voice-gateway services using onboard digital signal processors (DSPs)

  • Centralized call-processing networks using a centrally deployed Cisco CallManager and survivable-remote-site (SRS) telephony software

  • Converged networks where a single-box solution will provide a lower total cost of ownership (TCO)

Ethernet Switch Features

The Catalyst 4200 supports QoS based on the Institute of Electrical and Electronics Engineers (IEEE) 802.1p class of service (CoS), and port-based prioritization. The Catalyst 4200 supports port-based reclassification, which allows the switch to change the CoS settings of tagged packets on a per-port basis. The Catalyst 4200 supports four queues that are configurable using a Weighted-Round-Robin (WRR) scheduler. This enables users to prioritize mission-critical traffic, such as VoIP and IP-based video applications over regular traffic.

The Catalyst 4200 can automatically configure virtual LAN (VLAN) and trusted-extension settings for IP phones. This overcomes the management complexity of overlaying a voice topology onto a data network while maintaining the quality of voice traffic. With the auxiliary VLAN feature, network administrators can segment phones into separate logical networks even though the data and voice infrastructures are physically the same. The auxiliary VLAN feature places the phones into their own VLANs without the need for end-user intervention. A user can plug the phone into the switch, and the switch provides the phone with the necessary VLAN information.

Other key Ethernet switch features include:

  • Twenty-four 10BaseT/100BaseTX autosensing ports, each delivering up to 200 Mbps of bandwidth (full duplex) to individual users, servers, or workgroups to support bandwidth-intensive applications

  • Forwarding and filtering at full wire speed on each port

  • Support for up to 8000 unicast and 256 multicast addresses

  • Protocol-Independent-Multicast (PIM) and Internet-Group-Management-Protocol (IGMP) snooping

  • Four queues on each 10/100 port, enabling network traffic prioritization and seamless data, voice, and video integration through the IEEE 802.1p protocol

  • Port-based reclassification that allows users to reclassify IEEE 802.1p CoS values on a per-port basis for a finer granularity of QoS control

  • Per-port broadcast, multicast, and unicast storm control that prevents faulty end stations from degrading overall system performance

  • Inline 48-volt DC power to all 24 10BaseT/100BaseTX autosensing ports

  • Media Access Control (MAC)-based port-level security to prevent unauthorized stations from accessing the switch

Inline Power

The Catalyst 4200 can provide 48-volt DC power over standard Category 5 unshielded twisted-pair (UTP) cable up to 100 meters. Instead of requiring wall power at every desktop, terminal devices such as IP phones use power supplied by the Catalyst 4200. With the phone discovery feature, the Catalyst 4200 automatically detects the presence of an IP phone and supplies inline power. By deploying Catalyst 4200 switches with uninterruptible power supply (UPS) systems, network administrators can ensure that power outages do not affect the telephony connections of a branch office.

Router Features

A key benefit of the Catalyst 4200 is that it runs Cisco IOS® Software, the operating system deployed in most of the Internet backbone equipment around the world.

Key router benefits include:

  • A high-performance MPC 8260 processor provides all the processing power required for delivering voice, streaming video, and data to the branch office

  • Impressive packet-processing capabilities (35,000 pps at 64-byte Layer 3)

  • Broad protocol support, including IP, Internetwork Packet Exchange (IPX), and IBM Systems Network Architecture (SNA) features

  • Shares modular voice- and WAN-interface-card interfaces with the Cisco 1700, 2600, 3600, and Catalyst 4000 Access Gateway Module platforms (see Table 1).

Table 1: Multiflex Voice and WAN Interface Cards for the Catalyst 4200
Module Description

One-port T1/fractional T1 multiflex trunk with channel/data service unit (CSU/DSU)


Dual-port T1/fractional T1 multiflex trunk with CSU/DSU


One-port E1/fractional E1 multiflex trunk with DSU


Dual-port E1/fractional E1 multiflex trunk with DSU


T1/fractional T1 CSU/DSU


One-port four-wire 56/64-kbps CSU/DSU


One-port high-speed serial


Dual-port high-speed serial


Dual-port async/sync serial

Voice-Gateway Features

To help make the migration to IP telephony easier and more cost-effective, the Catalyst 4200 includes an integrated eight-port FXS gateway. FXS ports can provide significant cost savings in the branch office by consolidating PSTN trunk connections typically used by modems and fax machines into the Catalyst 4200. The gateway provides enhanced line-cross protection for shorts on tip and ring.

The Catalyst 4200 supports a wide range of voice interface cards and supports most popular signaling protocols. Supported protocols and interface types include T1-Primary Rate Interface (PRI), E1-PRI, T1-channel-associated signaling (CAS), E1-CAS R2, ISDN Basic Rate Interface (BRI), and foreign exchange office (FXO) (see Table 2).

Table 2: Voice Interface Cards for the Catalyst 4200
Module Description

Two-port FXS voice/fax interface card


Two-port FXO voice/fax interface card (version for North American and other countries)


Two-port BRI S/T terminal equipment voice/fax interface card (supports voice or data)


One-port T1/fractional T1 multiflex trunk with CSU/DSU


Dual-port T1/fractional T1 multiflex trunk with CSU/DSU


One-port E1/fractional E1 multiflex trunk with DSU


Dual-port E1/fractional E1 multiflex trunk with DSU

Additional key voice-gateway benefits include:

  • Private-branch-exchange (PBX) and PSTN connectivity

  • H.323v2 voice-over-IP (VoIP) gateway functions

  • Onboard DSPs allocated to voice interfaces

  • Fax and modem pass-through

Centralized Call Processing

The demand for technology to support increased employee productivity and lower costs is at an all-time high. At the same time, many organizations are struggling to deploy new applications and services because of flat budgets or a lack of qualified IT personnel. The centralized call-processing model can provide technology to users that require it, while simultaneously providing centralized management and maintenance of applications to network administrators. (See Figure 2.)

Figure 2: Centralized Call-Processing Network Diagram

Instead of deploying and managing key systems or PBXs in small branch offices, applications are centrally located at the corporate headquarters or data center, and accessed via the IP WAN. This deployment model allows branch-office users to access the full enterprise suite of communications and productivity applications for the first time, while lowering the TCO. There is no need to "touch" each branch office each time a software upgrade or new application is deployed, accelerating the speed in which organizations can adopt and deploy new technology solutions. In the Internet economy, the ability to quickly roll out new applications to remote users can provide a sustainable competitive advantage versus companies that must visit each of their branch sites to take advantage of new applications.

An architecture in which a Cisco CallManager and other Cisco IP telephony applications are located at the central site has the following benefits:

  • Centralized configuration and management

  • Access at every site to all Cisco CallManager features, next-generation contact centers, unified-messaging services, personal productivity tools, mobility solutions, and soft phones

  • No requirement for IT staff at each remote site

  • Ability to rapidly deploy applications to remote users

  • Easy upgrades and maintenance

  • Lower TCO

Survivable-Remote-Site Telephony

As enterprises extend their IP telephony deployments from central sites to remote offices, an important consideration is the ability to cost-effectively provide backup redundancy at the remote branch office. However, the size and number of these small-office sites precludes most enterprises from deploying dedicated call-processing servers, unified-messaging servers, or multiple WAN links to each site to achieve the required high availability. The Cisco CallManager IP telephony solution with the SRS telephony feature allows companies to extend high-availability IP telephony to their remote branch offices with a cost-effective solution that is easy to deploy, administer, and maintain.

The SRS telephony capability is embedded in the Cisco IOS Software that runs on the Catalyst 4200. SRS telephony automatically detects a failure in the network, and using Cisco Simple Network Automated Provisioning (SNAP) capability, initiates a process to intelligently autoconfigure the Catalyst 4200 to provide call-processing backup redundancy for the IP phones in the affected office. The router provides call processing for the duration of the failure, ensuring that critical phone capabilities are operational. Upon restoration of the WAN and connectivity to the network, the system automatically shifts call-processing functions to the primary Cisco CallManager cluster. Configuration for this capability is done only once in the Cisco CallManager at the central site. The Catalyst 4200 can provide SRS support for up to 48 IP telephones.

VPN and Firewall Features

Security is critical in enterprise networks, and securing converged voice, video, and data networks will continue to increase in importance. The innovative features of the Catalyst 4200 Switch provide the same high-level security capabilities to voice and video networks as is available to data networks. The Catalyst 4200 can be ordered with the Cisco IOS Software Firewall Feature Set, optional IP Security (IPSec) with Data Encryption Standard (DES), and Triple DES (3DES). Hardware encryption using the onboard encryption accelerator provides significantly higher performance than software-based encryption, and frees processor capacity for other services.

The following encryption features are supported:

  • 56-bit DES encryption using cipher-block-chaining (CBC) mode*

  • 168-bit IPSec 3DES encryption using CBC mode*

  • Message Digest 5 (MD5) and secure-hash-algorithm 1 (SHA-1) hashing, including support for the hash-based message authentication code (HMAC) transform with IPSec authentication header (AH) and Encapsulating Security Protocol (ESP)

  • Support for Diffie-Hellman key exchange

  • Rivest, Shamir, Adelman (RSA) and Digital Signal Standard (DSA) public key signature and verification (when implemented by the Cisco IOS Software IPSec Crypto Engine)

* IPSec DES and 3DES software are controlled by U.S. export regulations on encryption products. For additional details, visit

Quality of Service

The Catalyst 4200 provides the performance and intelligent services of Cisco IOS Software for branch-office applications. The Catalyst 4200 can identify user applications—such as voice or multicast video—and classify traffic with the appropriate priority levels. QoS policies are enforced using Layer 2 and 3 information such as 802.1p and IP Precedence. The queues of the Catalyst 4200 with configurable thresholds employ Weighted Random Early Detection (WRED), WRR, and type/class-of-service (ToS/CoS) mapping to ensure that QoS is maintained as packets traverse the network.

To ease the deployment of QoS, the Catalyst 4200 is supported by Cisco QoS Policy Manager (QPM). QPM is a complete policy-management tool that enables provisioning of end-to-end differentiated services across network infrastructures with converged voice, video, and data applications. The combination of QPM and the CiscoWorks Service Management Solution enables network administrators to adjust service levels in accordance with defined QoS policies. The end result is network-wide intelligent and consistent QoS that enables performance protection for voice applications while reducing costs for growing networks.

Cost of Ownership

Multiple devices generally lead to higher deployment, management, and maintenance costs. By integrating Ethernet-switching, IP-routing, and voice-gateway capabilities into a single chassis, deploying data, voice, and video to the branch office has a direct, positive effect on TCO. The Catalyst 4200 lowers management and maintenance expenses, reducing operational complexity and accelerating time to deployment. With a single, remotely manageable solution, remote offices can be maintained without onsite technical resources.

Deploying the Catalyst 4200 in a centralized call-processing environment can further lower ownership costs. By centralizing Cisco CallManager servers and other IP voice and video applications, enterprises gain valuable control of all data, voice, and video applications. Deploying distributed applications requires server hardware and technical personnel at each site to operate and maintain these applications. Often, distributed applications mean that small branch offices receive less-capable or feature-limited applications relative to central-site or large regional offices. Centralized applications guarantee all users access to the same advanced applications, increasing productivity even at small branch sites.

Redundant-Power-Supply Support

The Cisco Redundant Power System 300 (RPS 300) provides internal power-supply redundancy for up to six networking devices and features an immediate fail-over capability. The Cisco RPS 300 can be combined with the Catalyst 4200 and a UPS to provide highly available voice, video, and data services to the branch office. (See Figure 3.)

Figure 3: Cisco Redundant Power Supply System 300

Catalyst 4200 Cisco IOS Images

  • IP Plus (standard)

  • IP Plus/IPX/SNA

  • IP Plus/Firewall

  • IP Plus/IPX/SNA/Firewall

  • IP Plus/IPSec 56

  • IP Plus/3DES

  • IP Plus/Firewall/IPSec 56

  • IP Plus/Firewall/3DES

  • IP Plus/IPX/SNA/Firewall/IPSec 56

  • IP Plus/IPX/SNA/Firewall/3DES

  • Optional feature license required to use SRS telephony

Table 3: Catalyst 4200 Specifications
Description Specification

Processor Type

MPC 8260 with 200-MHz 603e core


35,000 pps at 64-byte Layer 3, 3.3-Mpps Layer 2 switch

Flash Memory

32 MB

System Memory (DRAM)

64 MB

Voice/WAN-Interface-Card Slots

Two (first and second slot support voice/WAN interface cards)

Voice-Interface-Card Slots

One (third slot is voice interface card only)

Console Port

One (up to 115.2 kbps)

10/100BaseT Management Port


Onboard LAN Ports

24 10BaseT/100BaseTX autosensing full-duplex ports

Onboard FXS Ports

8 (RJ-21 connector)

Redundant-Power-Supply Support (Cisco RPS 300)


MAC Addresses


SRS Telephony Users


Hardware Encryption

Included onboard



Power Requirements

Power Supply

240W, 12V/-48V AC-DC Supply


12V at 8A, -48V at 3A

AC Input Voltage

100 to 240 VAC



AC Input Current

AC rated current 4.2 A

Environmental Specifications

Operating Temperature

32° to 104° F (0° to 40° C)

Nonoperating Temperature

-13° to 158° F (-25° to 70° C)

Relative Humidity

5-90% noncondensing

Operating Altitude

Up to 6500 ft (2000m)

Dimensions (H x W x D)

3.42 x 17.17 x 14.3 in. (8.69 x 43.61 x 36.32 cm)

Weight (without voice/WAN interface cards)

16.5 lb (7.6 kg)

Table 4: Regulatory Compliance
Specification Description
Regulatory Compliance Products bear CE marking, indicating compliance with the 99/5/EEC directives


UL 1950

CAN/CSA-C22.2 No. 950

EN 60950

IEC 60950

TS 001


FCC Part 15

ICES-003 Class A

EN55022 Class A

CISPR22 Class A

AS/NZS 3548 Class A

VCCI Class A

Telecom (T1)

FCC Part 68

Canada CS-03

JATE Blue Book

CTR 21

Ordering Information

Part Number Description

Catalyst 4200 Access Gateway Switch

For More Information on Cisco Products, contact:

United States and Canada: 800 553-NETS (6387)

Europe: 32 2 778 4242

Australia: 612 9935 4107

Other: 408 526-7209

World Wide Web URL:

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