Cisco HWIC-1SHDSL Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 1-Pair G.SHDSL High-Speed WAN Interface Card
Spare SKU:HWIC-1SHDSL=
Naming Breakdown
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HWIC: High-Speed WAN Interface Card
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1SHDSL: Single-pair ITU-T G.991.2 G.SHDSL symmetrical DSL interface
Important Clarification: HWIC-1SHDSL belongs to the ISR G2 HWIC platform. Do not confuse it with legacy WIC-1SHDSL / WIC-1SHDSL-V2 for older 1700/2600 routers.
Core Product Positioning
The Cisco HWIC-1SHDSL is a single-wide pluggable symmetrical DSL WAN interface card designed for Cisco Integrated Services Routers. It delivers cost-effective symmetrical broadband connectivity over existing copper twisted-pair cabling based on the G.SHDSL standard. It enables inter-site WAN connections, VoIP, video conferencing and business data services for enterprise branch offices as an economical alternative to traditional T1/E1 leased lines. The card operates in ATM transport mode and supports flexible rate adjustment over copper loops.
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 2900 Series: 2901, 2911, 2921, 2951
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Cisco 3800 Series: 3825, 3845
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Cisco 3900 Series: 3925, 3945, 3925E, 3945E
Unsupported Platforms
Legacy 1700/2600/3600 routers, ISR 4000/9000 series, Catalyst switches
Supported IOS Firmware
Minimum IOS Release: 12.4(11)XJ; Fully validated releases: 12.4T, 15.0, 15.1, 15.2(4)M and subsequent IOS mainline versions
3. Physical & Electrical Technical Specifications
Form Factor
Single-wide HWIC module, occupies one HWIC expansion slot
Front Panel Interface
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1 × RJ45 port for single-pair G.SHDSL copper connection
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Status LED indicators: LINK, TRAFFIC activity light
DSL Standard & Performance
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Standard: ITU-T G.991.2 (G.SHDSL) Annex A / Annex B
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Symmetrical data rate range: 192 kbps up to 2.304 Mbps over single copper pair
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Line coding: TC-PAM
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Supports CPE (customer premises) and CO (central office) operating modes
Maximum Loop Reach
Rate-dependent distance over standard telephone copper cable
Power Consumption
Typical power draw: 5.6 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 Features
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ATM AAL5 encapsulation, supports up to 8 permanent virtual circuits (PVCs)
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ILMI management protocol for DSLAM interoperability
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ATM traffic classes: UBR, VBR-RT, VBR-NRT, ABR
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Loopback diagnostics for line fault testing
Routing & Data Services
IPv4 / IPv6 dual stack, Static routing, EIGRP, OSPF, RIP
GRE tunneling, IPsec VPN termination over DSL links
Voice & QoS Capabilities
QoS traffic classification, queuing and shaping for VoIP and video traffic
Supports AAL2 transport for voice when deployed with Cisco voice modules
802.1p and IP DSCP marking for end-to-end service prioritization
Interoperability
Compatible with Cisco G.SHDSL DSLAMs and third-party standard-compliant G.SHDSL equipment
Supports back-to-back router-to-router direct copper connection without DSLAM
Management Functions
IOS CLI configuration, SNMP v1/v2c/v3, Syslog logging
DSL line monitoring: signal-to-noise ratio (SNR), attenuation, error counters
5. Typical Enterprise Deployment Use Cases
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Symmetrical low-cost branch WAN access replacing expensive T1/E1 leased lines
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Inter-site enterprise VPN connectivity for remote offices and regional branches
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Unified communications deployments supporting simultaneous data, VoIP and video traffic
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Industrial and campus long-distance copper-based point-to-point data links
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Secondary backup WAN circuit for primary internet or private network connections
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-1SHDSL single-pair G.SHDSL HWIC module
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Hardware installation guide
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Safety and regulatory documentation
Copper DSL cable is sold separately.
End-of-Life Status Note
Cisco HWIC-1SHDSL has reached Cisco End-of-Sale (EoS). Official firmware maintenance and new hardware production are discontinued. Recommended migration alternatives: HWIC-2SHDSL or modern ISR 4000 NIM DSL interfaces.
UNSPSC Classification Code
43222608 – Cisco HWIC-1SHDSL single-pair G.SHDSL symmetrical DSL High-Speed WAN Interface Card for Cisco ISR 1841/2800/2900/3800/3900 integrated service routers, providing ATM-based symmetrical broadband WAN connectivity over existing copper twisted-pair cabling for enterprise branch deployments.
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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