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This section describes the Catalyst 4224 Access Gateway Switch and contains the following topics:
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Note Throughout this publication, the term Catalyst 4224 is used to refer to the Catalyst 4224 Access Gateway Switch. |
The Catalyst 4224 is a compact, five-slot voice and data integrated switch/router intended for use by enterprise branch offices with as many as 24 users (see Figure 1-1).
The Catalyst 4224 can interface with networking equipment using Ethernet (10BaseT) and Fast Ethernet (100BaseT) interfaces.
The Catalyst 4224 has five slots. Slots 1 and 2 are reserved for the voice interface cards (VICs) and wide area network interface cards (WICs). Slot 3 is reserved for a VIC. Slot 4 is reserved for the eight-Port RJ21 FXS module. Slot 5 consists of 24 10BaseT and 100BaseTX autosensing ports with Quality of Service (QoS) support. For more information, see the "Slots" section.
Table 1-1 describes the Catalyst 4224 features.
| 1MAC = Media Access Control
2VTP = VLAN Trunk Protocol 3CLI = command-line interface 4SNMP = Simple Network Management Protocol 5RMON = Remote Monitoring 6CDP = Cisco Discovery Protocol 7CGMP = Cisco Group Management Protocol 8IKE = Internet Key Exchange |
This section describes the Catalyst 4224 components:
Figure 1-2 shows the front panel of the Catalyst 4224.
The Catalyst 4224 has two types of management ports: console serial and 10/100BaseT management.
An RJ-45 console serial port allows you to perform switch-management functions using a terminal.
For a description of the console port pinouts, see "Technical Specifications."
An RJ-45 802.3-compliant port allows you to perform TCP/IP switch-management functions (Telnet, SNMP, and FTP), configure IP addresses with BOOTP, and download software images.
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Note The 10/100BaseT port is used for network management only. You cannot use this port for switching. No connection exists between this port and the 10/100BaseT switching ports. |
For a description of the management port pinouts, see "Technical Specifications."
The Catalyst 4224 has the following slots:
The LEDs on the front panel of the Catalyst 4224 are described in Table 1-2.
The system fan assembly provides cooling air for the internal chassis components. The fans exhaust warm air from one end and draw in cool air at the other end.
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Note For complete environmental specifications, including airflow requirements, see "Technical Specifications." |
Figure 1-3 shows the direction of airflow through the Catalyst 4224.
If an individual fan fails, the other fans continue to run. Sensors monitor the internal air temperatures. If the air temperature exceeds a tolerable threshold, the environmental monitor displays warning messages.
The Catalyst 4224 supplies 240W, 12V output power with AC power factor correction. When power is removed from the power supply on a Catalyst 4224, the Cisco Redundant Power System 300 (RPS 300) is triggered to produce full power (see Figure 1-4). The RPS 300 provides internal power supply redundancy for up to six networking devices and features an immediate failover capability. When the RPS 300 is combined with the Catalyst 4224 and a uninterruptible power supply (UPS), the branch office receives highly available voice, video, and data services.
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Note For complete power specifications for the Catalyst 4224, see "Technical Specifications." |
The environmental monitoring feature maintains the normal system operation by correcting adverse environmental conditions before the switch ceases to operate.
Every 30 seconds, a background switch process monitors the status of the RPS 300 and the temperature sensor. If one of the following situations is detected, the STATUS LED turns red:
Based on the situation detected, the RPS LED is set as follows:
Instead of requiring wall power at every desktop, terminal devices such as IP phones use power supplied by the Catalyst 4224. Each of the 24 ports on the Catalyst 4224 provide 6.3 watts of -48V power to the IP phones over standard 5 UTP cable up to 100 meters. By default, the ports are set to AUTO to power up an IP phone discovered via CDP on that port.
This section outlines the interface cards supported by the Catalyst 4224:
The Catalyst 4224 allows you to perform LAN switching and IP WAN routing by using WICs. A one-port 56/64-kbps data service unit/channel service unit (DSU/CSU) card provides service at 56- and 64-kbps; a two-port asynchronous/synchronous serial card provides service to dedicated 64 kbps lines; a one- or two-port serial card provides service at speeds up to 115.2 kbps; and a two-port ISDN card provides connection to an ISDN WAN through an external NT1 device.
For details on these WAN interface cards, see the following sections:
The one-port 56/64-kbps Data Service Unit/Channel Service Unit (DSU/CSU) card (see Figure 1-5) includes an integrated DSU/CSU. You can configure this card to provide circuit-switched, dedicated, or leased-line service at 56 kbps. This card also supports 64-kbps dedicated lines.
The Catalyst 4224 supports the WIC-1DSU-56K DSU/CSU card.
The one-port T1/fractionalized T1 (FT1) WAN interface card (see Figure 1-6) includes an integrated Data Service Unit/Channel Service Unit (DSU/CSU) and can be configured for either full T1 or fractionalized T1 services.
The Catalyst 4224 supports the WIC-1DSU-T1 card.
The two-port asynchronous/synchronous (A/S) serial card (see Figure 1-7) provides an EIA/TIA-232, EIA/TIA-449, V.35, X.21, Data Terminating Equipment/Data Communication Equipment (DTE/DCE), EIA-530, or EIA-530A serial interface to a Catalyst 4224.
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Note The Catalyst 4224 supports only the 128 kbps synchronous link at this time. |
The Catalyst 4224 supports the WIC-2A/S serial card.
The one- and two-port serial WAN interface cards provide serial connections to remote sites or legacy serial network devices such as SDLC concentrators, alarm systems, and POS devices. Data encapsulation occurs through Frame Relay. Both cards support speeds up to a maximum of 2.048 mbps.
The Catalyst 4224 supports the one-port WIC-1T serial card (see Figure 1-8). The WIC-1T supports these electrical interfaces when used with the appropriate transition cable: V.32, RS-232, RS-449, RS-530, and RS-530A in male and female versions for both DCE and DTE devices.
The Catalyst 4224 supports the two-port WIC-2T serial card (see Figure 1-9). You can configure each port on the WIC-2T independently of the other card, allowing support for different physical interfaces (protocol and DTE/DCE).
The WIC-2T supports a wide variety of electrical interfaces: V.32, RS-232, RS-449, RS-530, and RS-530A in male and female versions for both DCE and DTE devices.
The Catalyst 4224 allows you to access the Public Switched Telephone Network (PSTN) through toll by-pass by using VICs.
The Catalyst 4224 supports two types of Foreign Exchange interface cards: FXS and FXO.
The two-port FXS analog interface card provides direct connections to a telephone. The eight-port FXS TM analog interface module provides service to analog phones and fax machines. The two-port FXO analog interface card provides connections to a central office (CO).
The Catalyst 4224 also supports a two-port ISDN BRI/ST card to provide a physical interface to an NT1 terminator.
For details on these voice interface cards, see the following sections:
A two-port FXS interface card (see Figure 1-10) connects directly to a standard telephone or similar device. This interface supplies ringing voltage and dial tone to the station.
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Note The ports on this interface card are color-coded gray. |
The Catalyst 4224 supports the VIC-2FXS card.
The eight-port FXS RJ21 card (see Figure 1-11) is a high-density analog phone and fax relay interface that emulates a PSTN Central Office (CO) or a PBX.
A two-port FXO interface card connects local calls to a central office or a PBX. A standard telephone provides this interface.
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Note The ports on this interface card are color-coded pink. |
The Catalyst 4224 supports the following two-port FXO analog interface cards (see Figure 1-12):
The two-port ISDN BRI voice interface card (see Figure 1-13) provides a client-side ISDN S/T interface to connect to an NT1 terminating an ISDN telephone network. Each port can support two calls (one over each ISDN B channel), for a total of four calls per ISDN BRI card.
The Catalyst 4224 supports the VIC-2BRI-S/T-TE ISDN card.
Voice/WAN Interface Cards (VWICs) are multiflex trunk interface cards that provide voice and data access to the PSTN through TDM ports. Using VWICs, the Catalyst 4224 provides basic structured and unstructured service for fractional T1 networks, structured service for fractional E1 networks, and support for unstructured G.703. Each card includes an integrated DSU/CSU.
This section describes these cards:
The Catalyst 4224 supports these one-port multiflex trunk interface cards:
You can distinguish between T1, E1 and G703 interface cards by the labeling on the faceplate. The label is beneath the port and next to the LEDs.
The Catalyst 4224 supports these two-port multiflex trunk interface cards:
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Note The Catalyst 4224 does not support the drop-and-insert functions on the VWIC-2MFT-T1-DI and VWIC-2MFT-E1-DI cards. |
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Note You can distinguish between T1, E1, drop-and-insert, and G703 interface cards by the labeling on the faceplate. |
Posted: Sat Jan 18 13:43:19 PST 2003
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