Cisco HWIC-1ADSL Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 1-Port ADSL/ADSL2/ADSL2+ over POTS High-Speed WAN Interface Card
Spare SKU:HWIC-1ADSL=
Naming Breakdown
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HWIC: High-Speed WAN Interface Card
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1ADSL: Single asymmetric DSL interface supporting ADSL, ADSL2, ADSL2+ (Annex A, ADSL over Plain Old Telephone Service)
Core Product Positioning
The Cisco HWIC-1ADSL is a single-wide pluggable asymmetric DSL WAN module designed for Cisco Integrated Services Routers. It delivers business-grade broadband access over standard single-pair copper telephone cabling. The card separates voice POTS traffic and data DSL signals on the same loop, enabling simultaneous telephone service and IP data connectivity. Operating over ATM transport, it serves as a cost-effective primary or backup internet/WAN connection for enterprise branch offices, small businesses and remote site deployments.
2. Hardware Compatibility & Supported IOS Releases
Supported Router Platforms
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Cisco 1841, 1861
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Cisco 1900 Series: 1921, 1941
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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 switching platforms
Distinction note: HWIC-1ADSL = Annex A (POTS); HWIC-1ADSL-M = Annex M for increased upstream bandwidth.
Supported IOS Firmware
Minimum IOS Release: 12.4(4)T; Fully 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 × RJ11 port for ADSL copper loop connection
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Status LEDs: LP (Loop), CD (Carrier Detect), OK (Module Status)
DSL Standards & Performance
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ITU-T G.992.1 (ADSL), G.992.3 (ADSL2), G.992.5 (ADSL2+) Annex A
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ADSL2+: Downstream up to 24 Mbps, Upstream up to 1.5 Mbps
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ADSL2: Downstream up to 12 Mbps, Upstream up to 1.0 Mbps
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ADSL: Downstream up to 8 Mbps, Upstream up to 800 kbps
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Integrated splitter support for coexistence of POTS voice and data
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Supports Dying Gasp alarm notification for power failure events
Power Consumption
Typical power draw: 5.3 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 Functions
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ATM AAL5 encapsulation, supports multiple Permanent Virtual Circuits (PVCs)
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ILMI auto-configuration for interoperability with standard DSLAMs
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ATM service classes: UBR, VBR-NRT, VBR-RT
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Built-in loopback tests for copper line diagnostics
Routing & Tunneling
IPv4 / IPv6 dual stack, Static routing, EIGRP, OSPF, RIP
GRE tunneling, IPsec VPN termination for secure site-to-site connectivity
Voice & QoS Capabilities
DSCP and 802.1p CoS marking, traffic policing and shaping
Optimized to support VoIP, video conferencing and unified communications traffic
AAL2 voice transport compatible with Cisco DSP voice modules
Interoperability
Works with all industry-standard ADSL/ADSL2+ DSLAMs from Cisco and third-party carriers
Management Features
IOS CLI configuration, SNMP v1/v2c/v3, Syslog event logging
Real-time DSL line monitoring: SNR margin, line attenuation, error counters
5. Typical Enterprise Deployment Use Cases
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Primary low-cost broadband internet access for small enterprise branch offices
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Secondary backup WAN link for redundancy against leased-line outages
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Remote site unified communications supporting simultaneous voice telephone and data services
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Retail location network connectivity for POS systems, staff workstations and surveillance cameras
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SME site-to-site VPN deployment over carrier ADSL broadband circuits
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-1ADSL single-port ADSL HWIC module
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Hardware installation guide
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Safety and regulatory documentation
RJ11 telephone cable is sold separately.
End-of-Life Status Note
Cisco HWIC-1ADSL has reached Cisco End-of-Sale (EoS). Official firmware maintenance and new hardware production have been discontinued. Recommended migration: EHWIC-1ADSL for newer ISR platforms or fiber broadband WAN solutions.
UNSPSC Classification Code
43222608 – Cisco HWIC-1ADSL single-port ADSL/ADSL2+ Annex A High-Speed WAN Interface Card for Cisco ISR 1800/1900/2800/2900/3800/3900 integrated service routers, providing ATM-based asymmetric broadband connectivity over existing copper telephone lines for branch office WAN access.
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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