Cisco Network Modules

Overview

Cisco Catalyst 4000 Series
   Inline Power Solution

Enabling inline power and simplifying IP telephony deployment in the enterprise wiring closet and branch office.

The Cisco^® Catalyst^® 4000 Series switches extend the Cisco AVVID (Architecture for Voice, Video and Integrated Data) networking capabilities of the Cisco Catalyst backbone to the enterprise wiring closet and branch office. The Cisco Catalyst 4000 Inline Power Fast Ethernet line card enables the modular wiring-closet infrastructure to provide centralized power for Cisco AVVID IP telephony networks. The line card prepares the network infrastructure for IP-based, converged business applications that will provide transparent communications and collaboration between branch and corporate sites (refer to Figure 1).

The Cisco Catalyst 4000 Inline Power solution includes:

Enabling Leading-Edge Features

Cisco Catalyst 4000 Inline Power 10/100BASE-TX Switching Line Card

The Cisco Catalyst 4000 Inline Power 10/100BASE-TX Ethernet Switching line card supports up to 48 ports per line card (RJ-45 interfaces). Along with phone discovery, these line cards support autosensing and autonegotiation to determine the speed and duplex mode of the attached device. The Cisco Catalyst 4006, with support for up to 240 multiservice ports, directly provides inline power. To support the demand for phone power on the Cisco Catalyst 4006, Cisco has developed an auxiliary DC power shelf that supplies the Cisco Catalyst 4006 with the 48 volts needed for inline power.

Auxiliary DC Power Shelf

The auxiliary DC power solution includes:

Figure 2 shows the connectivity between each of these inline power components.

The auxiliary DC power shelf is a 3-slot chassis that supports two or three auxiliary PSUs that generate the 48 VDC required for IP phones. Each PSU delivers 1050W of power, and two PSUs can be combined to provide up to 2100W of power. Two PSUs are required in the nonredundant configuration as a minimum, supporting the full 240-port capacity of the Cisco Catalyst 4006. The third PSU is an optional, fault-tolerant supply, providing N + 1 redundancy. The auxiliary power shelf connects to a 110-VAC 12A power source.

Power Entry Module

The Cisco Catalyst 4000 PEM is the interface between the auxiliary DC power shelf and the Cisco Catalyst 4006 chassis. The PEM has a dedicated bay in the power section of the Cisco Catalyst 4006 chassis, as shown in Figure 3. The PEM enables the chassis to draw -48-VDC power directly from the auxiliary DC power shelf and distribute it over the Cisco Catalyst 4006 backplane traces to the inline power 10/100 Ethernet line cards in the Cisco Catalyst 4006 chassis.

Inline Power

Inline power is 48-VDC power provided over standard Category 5 unshielded twisted-pair (UTP) cable up to 100 meters. Instead of requiring wall power, terminal devices such as IP telephones can utilize power provided from the Cisco Catalyst 4000 Switch. This capability gives the network administrator centralized power control, which translates into greater network availability. By deploying Cisco Catalyst 4000 switches with uninterruptible-power-supply (UPS) systems in secured wiring closets, network administrators can ensure that power outages in a building will not affect network telephony connections.

The inline power feature works using a customer's existing Category 5 UTP installations. The Cisco Catalyst Inline Power implementation passes the required domestic and international safety regulations and compliance measures. These line cards are fully compliant with the 802.3 standard when no inline power is supplied. The 802.3 standard does not include specifications for providing power over Ethernet. Cisco is committed to standards-based operation and will support the IEEE in its efforts to add Ethernet power specifications to the 802.3 Ethernet standard.

IEEE 802.3af

Although the IEEE draft for power over Ethernet standards are not yet fully defined, the Cisco Catalyst 4006 chassis, auxiliary power shelf, and PEM are ready to support delivery of up to 15.4 watts per Ethernet port. New inline power line cards supporting both the IEEE 802.3af standard and Cisco inline power implementation will be available when the standard is ratified. For IEEE 802.3af compliance, an existing Cisco 48-port 10/100 Inline Power line card (part number WS-X4148-RJ45V) must be replaced with a new IEEE 802.3af-compliant line card.

Phone Discovery

The Cisco phone-discovery feature eases the network management burden by automating the inline-power feature. With phone discovery, the Cisco Catalyst switch automatically detects the presence of an IP phone and supplies inline power. This means that network administrators can maintain centralized control without the need to manually enable each port to supply inline power. The phone-discovery mechanism is intelligent enough to differentiate between an IP phone and a network interface card (NIC), and will not supply inline power to a NIC or other device not designed to use inline power. Network administrators can depend on automatic and centralized control of inline power that is safe to deploy and maintain.

Auxiliary VLAN

A unique feature that demonstrates advanced Cisco IP telephony leadership is the auxiliary VLAN feature. This feature provides automatic VLAN configuration for IP telephones, and overcomes the complexity of overlaying a voice topology on a data network. Network administrators can easily segment phones into separate logical networks, even though the data and voice infrastructure are physically the same. The auxiliary VLAN feature places the phones in their own VLANs without any end-user intervention. These VLAN assignments can be transparently maintained, even if the phone is moved to a new location. The user simply plugs the phone into the switch, and the switch provides the phone with the necessary VLAN information. By placing phones in their own VLANs, network administrators gain the advantages of network segmentation and control. Network administrators can preserve their existing IP topology for the data end stations. IP phones can be easily assigned to different IP subnets using standards-based Dynamic Host Configuration Protocol (DHCP) operation. With the phones in their own IP subnets and VLANs, network administrators can more easily identify and troubleshoot network problems. Additionally, network administrators can create and enforce quality-of-service (QoS) or security policies. With the auxiliary VLAN feature, Cisco enables network administrators to gain all the advantages of physical infrastructure while maintaining separate logical topologies for voice and data terminals, creating the most effective way to manage a multiservice network.

The auxiliary VLAN feature uses 802.1Q as the standards-based VLAN tagging mechanism between the switch and the phone. On the link between the phone and the switch, voice packets going to and from the phone are tagged with VLAN information. Packets going to and from the data end station remain untagged in the default configuration. Because the configuration between the switch and the phone is fully automated, the network administrator enjoys the benefits of VLANs without configuration complexity.

Additionally, the Cisco Catalyst 4000 Series offers more-advanced network management features. Each line card has extensive interface-level statistics, including four Remote Monitoring (RMON) groups: alarms, events, history, and statistics. For in-depth network analysis, users can employ the Enhanced Switched Port Analyzer (ESPAN) feature to redirect traffic from each switched port to a specific VLAN, allowing the user to add, move, and easily change group access to network resources from centralized locations using CiscoWorks. The Cisco Catalyst 4000 Series delivers comprehensive tools that enable network managers to control their fast-growing multiservice networks.

Increased Link Resiliency and Bandwidth Aggregation

Cisco Catalyst 4000 Series Fast Ethernet line cards fully support Cisco Fast EtherChannel^® technology and the IEEE 802.3ad Link Aggregation standard, giving network managers a reliable high-speed solution for the campus network backbone. Cisco Fast EtherChannel technology provides flexible, incremental bandwidth aggregation in multiple 200-Mbps increments, up to 1.6 Gbps per Fast EtherChannel link.

Customers can take advantage of the new multimodule-channeling feature that combines ports from the same line card or from different line cards into a Fast EtherChannel link. This is ideal for customers requiring scalable, flexible bandwidth within the network. Customers also benefit from Fast EtherChannel automatic recovery and redistribution of loads across the remaining links, ease of management, and technology that is transparent to network applications.

Superior Traffic Management

The Cisco Catalyst 4000 Series Fast Ethernet switching line cards offer superior traffic management with large per-interface buffers and multiple queues for QoS. These features allow users to configure a higher priority for mission-critical applications on any switched interface. The Cisco Catalyst 4000 Series of switches maintains up to 32,000 active Media Access Control (MAC) addresses in the bridge lookup table. The standard 802.1d spanning-tree algorithm is supported on a VLAN basis for fault-tolerant connectivity.

Features

The Cisco Catalyst 4000 Inline Power 10/100BASE-T Ethernet Switching line card features:

Features of the Cisco Catalyst 4000 Auxiliary DC Power Shelf include:

Ordering Information

Specifications

Physical Specifications

Cisco Catalyst 4000 Inline Power 10/100 BASE-TX Switching Line Card

Cisco Catalyst 4000 PEM

Cisco Catalyst 4000 Auxiliary DC Power Shelf

Cisco Catalyst 4000 Auxiliary PSU

Power Specifications

Cisco Catalyst 4000 Inline Power 10/100BASE-TX Switching Line Card

Cisco Catalyst 4000 Auxiliary PSU

Cisco Catalyst 4000 PEM

Standard Network Protocols

Environmental Conditions

Frame Processing

Network Management

Maximum Station-to-Station Cabling Distance

Indicators and Interfaces

Cisco Catalyst 4000 Inline Power 10/100BASE-TX Switching Line Card

Cisco Catalyst 4000 Auxiliary PSU

Compliance

Cisco Catalyst 4000 Inline Power 10/100BASE-TX Switching Line Card and Cisco Catalyst 4000 Auxiliary DC Power Shelf

Safety Certifications

Cisco Catalyst 4000 Inline Power 10/100 BASE-TX Switching Line Card and Cisco Catalyst 4000 Auxiliary DC Power Shelf

Electromagnetic Emissions Certifications

Cisco Catalyst 4000 Inline Power 10/100 BASE-TX Switching Line Card

Cisco Catalyst 4000 Auxiliary DC Power Shelf