Cisco HWIC-2ADSL Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco Dual-Port ADSL/ADSL2/ADSL2+ Annex A High-Speed WAN Interface Card
Spare SKU:HWIC-2ADSL=
Naming Breakdown
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HWIC: High-Speed WAN Interface Card
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2ADSL: Dual independent asymmetric DSL interfaces compliant with ADSL, ADSL2, ADSL2+ (Annex A for POTS coexistence)
Important Note: HWIC-2ADSL provides two separate RJ11 ADSL ports for two independent copper loops, supporting two distinct broadband circuits simultaneously. Do not confuse with HWIC-ADSLI-B-S/T which combines ADSL and ISDN.
Core Product Positioning
The Cisco HWIC-2ADSL is a single-wide pluggable asymmetric DSL WAN expansion module designed for Cisco modular Integrated Services Routers. It delivers two independent ATM-based ADSL/ADSL2/ADSL2+ connections over separate twisted-pair copper telephone lines. Each port supports simultaneous POTS voice and data transmission, enabling multi-homing broadband connectivity, redundant internet links, and separated data services for enterprise branch offices, retail sites and remote locations. It offers a low-cost alternative to expensive leased-line circuits for primary or backup WAN access.
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 ISRs, ISR 4000/9000 series, Catalyst switching platforms
Supported IOS Firmware
Minimum IOS Release: 12.4(6)T; 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 standard HWIC expansion slot
Front Panel Interfaces
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2 × independent RJ11 ports for ADSL copper loops
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Per-port LED indicators: LP (Loop), CD (Carrier Detect), Module OK status
DSL Standards & Performance
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ITU-T G.992.1 (ADSL), G.992.3 (ADSL2), G.992.5 (ADSL2+) Annex A (POTS)
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ADSL2+: Downstream up to 24 Mbps, Upstream up to 1.5 Mbps per port
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ADSL2: Downstream up to 12 Mbps, Upstream up to 1.0 Mbps per port
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ADSL (G.DMT): Downstream up to 8 Mbps, Upstream up to 800 kbps per port
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Built-in line separation to support coexistence of analog POTS voice and IP data
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Dying Gasp power-failure alarm supported on each DSL port
Power Consumption
Typical power draw: 6.2 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 independent Permanent Virtual Circuits (PVCs) on each port
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ILMI auto-provisioning for interoperability with industry-standard DSLAMs
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ATM service categories: UBR, VBR-NRT, VBR-RT
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Integrated loopback diagnostics for copper line troubleshooting
Routing & Tunneling Services
IPv4 / IPv6 dual stack, Static routing, EIGRP, OSPF, RIP
GRE tunneling, IPsec site-to-site VPN termination for secure inter-branch connectivity
Voice & QoS Capabilities
IP DSCP and 802.1p CoS priority marking, traffic policing and shaping
Optimized transport for VoIP, video conferencing and unified communications
AAL2 voice transport compatible with Cisco DSP voice modules
Interoperability
Fully interoperable with Cisco and third-party carrier ADSL/ADSL2+ DSLAM equipment
Management Capabilities
Native IOS CLI configuration, SNMP v1/v2c/v3, Syslog event logging
Per-port DSL monitoring: SNR margin, line attenuation, bit error statistics
5. Typical Enterprise Deployment Use Cases
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Dual broadband multi-homing for branch offices connecting to two separate ISPs for internet redundancy
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Independent primary and backup WAN circuits to prevent single-link failure
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Segregated network services: separate DSL links for corporate data and guest internet access
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Multi-location retail infrastructure for POS payment systems and surveillance traffic
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SME site-to-site VPN deployment using two independent carrier broadband 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-2ADSL dual-port ADSL HWIC module
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Hardware installation guide
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Safety and regulatory documentation
RJ11 telephone cables are sold separately.
End-of-Life Status Note
Cisco HWIC-2ADSL has reached Cisco End-of-Sale (EoS). Official firmware maintenance and new hardware manufacturing have been discontinued. Recommended migration: EHWIC ADSL modules for newer ISR platforms or fiber-based broadband access solutions.
UNSPSC Classification Code
43222608 – Cisco HWIC-2ADSL dual-port ADSL/ADSL2+ Annex A High-Speed WAN Interface Card for Cisco ISR 1800/1900/2800/2900/3800/3900 integrated service routers, delivering two independent ATM-based asymmetric broadband connections over twisted-pair copper for multi-homing and redundant branch office WAN 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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