Cisco HWIC-4SHDSL Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 4-Pair G.SHDSL High-Speed WAN Interface Card
Spare SKU:HWIC-4SHDSL=
Naming Breakdown
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HWIC: High-Speed WAN Interface Card
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4SHDSL: Four copper-pair ITU-T G.991.2 symmetrical DSL interface
Core Product Positioning
The Cisco HWIC-4SHDSL is a single-wide pluggable symmetrical DSL WAN interface card designed for Cisco ISR modular integrated service routers. It delivers scalable symmetrical broadband connectivity over existing copper twisted-pair cabling compliant with ITU-T G.991.2 standards. Supporting flexible 2-wire / 4-wire configurations, M-pair bonding and IMA (Inverse Multiplexing over ATM), the module aggregates up to four copper pairs to boost total throughput. It serves as a cost-effective alternative to T1/E1 leased lines for inter-site enterprise connectivity, unified communications including VoIP and video conferencing, and remote branch WAN access. This card operates purely in ATM transport mode.
2. Hardware Compatibility & Supported IOS Releases
Supported Router Platforms
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Cisco 1841
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Cisco 2800 Series: 2801, 2811, 2821, 2851
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Cisco 3800 Series: 3825, 3845
Unsupported Platforms
Legacy 1700/2600/3600 routers, ISR 2900/3900/4000/9000 series, Catalyst Ethernet switches
Note: HWIC-4SHDSL isnot supportedon ISR G2 2900 / 3900 platforms.
Supported IOS Firmware
Minimum IOS Release: 12.4(11)XJ; Validated releases: 12.4T, 15.0, 15.1, 15.2(4)M
3. Physical & Electrical Technical Specifications
Form Factor
Single-wide HWIC module, occupies one standard HWIC expansion slot
Front Panel Interface
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1 × RJ45 connector supporting up to four copper wire pairs
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Four independent LED indicators for link status and traffic activity
DSL Standard & Performance
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Standard: ITU-T G.991.2 (G.SHDSL) Annex A, Annex B, Annex F, Annex G
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Single pair (2-wire): 192 kbps ~ 5.696 Mbps symmetrical
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Dual pair (4-wire bonded): Up to 11.392 Mbps symmetrical
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Four-pair IMA bonding: Aggregated bandwidth up to 9.2 Mbps
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Line coding: TC-PAM
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Supports both CPE and CO operating modes
Important: HWIC-4SHDSLdoes not support Dying Gaspsignaling.
Power Consumption
Typical power draw: 6.8 W
Environmental Operating Parameters
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Operating temperature: 0°C to 40°C (32°F – 104°F)
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Storage temperature: -40°C to 70°C (-40°F – 158°F)
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Relative Humidity: 5% – 85% non-condensing
4. Key Protocol & Networking Feature Set
ATM Transport Capabilities
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ATM AAL5 encapsulation; supports up to 8 permanent virtual circuits (PVCs)
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IMA v1.1 multi-link aggregation and M-pair bonding
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ILMI protocol for interoperability with standard G.SHDSL DSLAMs
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ATM service classes: UBR, VBR-RT, VBR-NRT, ABR
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Built-in loopback diagnostics for copper line fault troubleshooting
Routing & Tunnel Services
IPv4 / IPv6 dual stack, Static routing, EIGRP, OSPF, RIP
GRE tunneling, IPsec VPN termination over DSL WAN links
Voice & QoS Functions
End-to-end QoS scheduling, traffic policing and shaping
IP DSCP and 802.1p CoS marking for VoIP, video and data prioritization
AAL2 voice transport support when paired with Cisco voice DSP modules
Interoperability
Compatible with standard G.SHDSL DSLAMs; supports direct back-to-back router-to-router copper connections without aggregation equipment
Management Features
IOS CLI full configuration access, SNMP v1/v2c/v3, Syslog logging
Real-time DSL line monitoring: SNR margin, line attenuation, bit error counters
5. Typical Enterprise Deployment Use Cases
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High-bandwidth symmetrical branch WAN access replacing costly T1/E1 leased circuits
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Multi-pair bonded copper connections for medium enterprise inter-site VPN infrastructure
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Unified communications deployments supporting simultaneous data, VoIP and video traffic
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Industrial and campus long-distance point-to-point connectivity over existing telephone copper
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Primary or redundant backup WAN links for remote regional office networks
6. Regulatory & Compliance Certifications
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Safety Standards: UL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1
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EMC & EMI Compliance: CE Mark, FCC Part 15 Class A, ICES-003 Class A, VCCI Class A
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Environmental Directives: EU RoHS 2.0 compliant, EU WEEE compliant
7. Standard Factory Package Contents
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Cisco HWIC-4SHDSL four-pair G.SHDSL HWIC module
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Hardware installation guide
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Safety and regulatory documentation
Copper connection cables are sold separately.
End-of-Life Status Note
Cisco HWIC-4SHDSL has reached Cisco End-of-Sale (EoS). Official firmware maintenance and new hardware production have been discontinued. Recommended migration alternatives: EHWIC-4SHDSL-EA for newer ISR platforms or fiber-based WAN solutions.
UNSPSC Classification Code
43222608 – Cisco HWIC-4SHDSL four-pair G.SHDSL symmetrical DSL High-Speed WAN Interface Card for Cisco 1841/2800/3800 integrated service routers, providing ATM-based multi-pair bonded symmetrical broadband WAN connectivity over twisted-pair copper for enterprise branch networking.
Standard Hardware Warranty
Brand-new modules carry a 1-year limited factory hardware warranty covering manufacturing defects. Refurbished inventory follows supplier warranty terms.
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