Cisco HWIC-1B-U Module
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Subcategory: Cisco 1800 Series High Speed WAN Interface Cards
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Model: HWIC-1B-U-RF
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Description: 1-port ISDN BRI NT1 HWIC REMANUFACTURED
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Price: 580.69 USDLast Update: 2021-11-01
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The Cisco 1-Port ISDN BRI U High-Speed WAN Interface Card (HWIC) is designed to provide reliable WAN connectivity for modular routers, specifically catering to the needs of small to medium-sized businesses and enterprise branch offices. By integrating this card into Cisco’s router platforms, organizations can achieve a more streamlined network infrastructure that supports essential data, security, and voice services within a single, cohesive system.
This solution emphasizes flexibility and investment protection, allowing businesses to adapt their network configurations as their bandwidth requirements or service provider offerings evolve. Because the card is compatible with a wide range of Cisco Integrated Services Routers, it helps reduce the complexity of managing multiple hardware components, ultimately leading to more efficient network operations and simplified deployment processes.
Product overview
The primary product discussed is the Cisco 1-Port ISDN BRI U High-Speed WAN Interface Card (HWIC-1B-U). This module provides a single ISDN BRI port with a built-in NT1 and utilizes an RJ-49C connector for connectivity. It is engineered to be a direct, high-performance upgrade for users familiar with the previous Cisco 1-Port ISDN WIC, ensuring that deployment can be handled smoothly without the need for additional training.
The card is supported across a broad spectrum of Cisco Integrated Services Routers, including the 1841, 1941, 2800, 2900, 3800, and 3900 series. By consolidating WAN access and voice functions—such as IP telephony and automated attendants—into these platforms, the HWIC enables a converged environment. This integration not only saves physical space but also enhances overall system reliability by reducing the number of individual devices, power supplies, and cables required in the network rack.
Features and benefits
- Integrated Connectivity: Features one ISDN BRI port with a U interface and a built-in NT1, using a standard RJ-49C connector.
- Operational Efficiency: Simplifies management through remote configuration, monitoring, and troubleshooting via Cisco IOS Software CLI and SNMP.
- Platform Flexibility: Supports redeployment across various Cisco router series (1841, 1941, 2800, 2900, 3800, and 3900), which helps reduce inventory stocking units.
- Enhanced Reliability: Minimizes potential points of failure by reducing the total number of components and cables in the network setup.
- Converged Services: Enables the deployment of advanced voice services, such as Cisco Communications Manager Express and SRST, when used with compatible routers and digital signal processors.
- Seamless Transition: Offers full feature parity with the legacy Cisco 1-Port ISDN WIC, allowing for an easy upgrade path for existing network infrastructures.
Figure 1. Cisco 1-Port BRI U interface High-Speed WAN Interface Card

Features
• One ISDN BRI port with U interface (built-in NT1)
• Utilizes an RJ-49C connector
Benefits
Integration
• Fewer devices and cables to deploy and manage
• Remote and local configuration, monitoring, and troubleshooting with the Cisco IOS Software command-line interface (CLI) and Simple Network Management Protocol (SNMP)
• Single-vendor support
• Enhanced reliability
• Physical space savings
Flexibility and Investment Protection
Enhanced Reliability
Converged Platform for SMB and Enterprise Branch Applications
Shared Features with Cisco 1-Port ISDN WIC
Table 1. Comparison Between WIC and HWIC
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Cisco 1-Port ISDN WIC |
Cisco 1-Port ISDN HWIC |
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One ISDN BRI port (U interface, integrated NT1) |
One ISDN BRI port (U interface, integrated NT1) |
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Supported on Cisco 1841, 2800, and 3800 Series |
Supported on Cisco 1841, 2800, 3800, 1941, 2900, and 3900 Series |
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Supported in NM-1FE2W-V2, NM-1FE1R2W, NM-2FE2W-V2, and NM-2W |
Supported in NM-1FE2W-V2, NM-1FE1R2W, NM-2FE2W-V2, and NM-2W |
Product Specifications
Platform Support
Table 2. Platform Support Details
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Feature |
Description |
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Supporting Platforms |
1841 (HWIC), 2801 (WIC/HWIC), 2811 (HWIC), 2821 (HWIC), 2851 (HWIC), 3825 (HWIC), 3845 (HWIC), 1941(HWIC), 2901(HWIC), 2911 (HWIC), 2921 (HWIC), 2951 (HWIC), 3925 (HWIC), 3945 (HWIC) |
Table 3. Maximum Number of HWICs per Platform
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Platform |
Maximum Number of HWICs |
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Cisco 1841 and 2801 |
2 |
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Cisco 1941 and 2901 |
2 |
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Cisco 2811, 2821, 2851 |
4 |
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Cisco 2911, 2921, 2951 |
4 |
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Cisco 3825 and 3845 |
4 |
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Cisco 3925 and 3945 |
4 |
Software Requirements
Table 4. Minimum Cisco IOS Software Release
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Platform |
Minimum Cisco IOS Software Release |
Cisco IOS Software Feature Set or Licenses |
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Cisco 1841, 2801, 2811, 2821, 2851, 3825, and 3845 |
12.4(16) and 12.4(20)T |
IP Base and Up |
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Cisco 1941, 2901, 2911, 2921, 2951, 3925, and 3945 |
15.0(1)M |
IP Base and up |
Ordering Information
Table 5. Ordering Information
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Product Number |
Description |
|
HWIC-1B-U |
1-Port ISDN BRI U interface High-Speed WAN Interface Card |
Hardware Specifications
Table 6. Hardware Specifications
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Feature |
Cisco 1-Port ISDN HWIC |
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ISDN Chipset |
Infineon |
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Dimensions |
• Width: 2.80 inches
• Depth: 4.75 inches
• Height: 0.75 inches
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Weight |
0.45 lbs |
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LEDs |
• B1 and B2 for ISDN channel status
• NT1 for connection status
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Ports |
Single RJ-49C port |
Safety, EMC, Telecom, Network Homologation, Power, Environmental Requirements, and Regulatory Approvals
• Cisco 1800 Series (modular): http://www.cisco.com/en/US/products/ps5853/products_data_sheet0900aecd8016a59b.html
• Cisco 2800 Series: http://www.cisco.com/en/US/products/ps5854/products_data_sheet0900aecd8016fa68.html
• Cisco 3800 Series: http://www.cisco.com/en/US/products/ps5855/products_data_sheet0900aecd8016a8e8.html
• Cisco 1900 Series (modular): http://www.cisco.com/en/US/products/ps10538/index.html
• Cisco 2900 Series: http://www.cisco.com/en/US/products/ps10537/index.html
• Cisco 3900 Series: http://www.cisco.com/en/US/products/ps10536/index.html.
For More Information
| Model | HWIC-1B-U-RF |
| Category | Cisco 1800 Series Integrated Services Routers |
| Subcategory | Cisco 1800 Series High Speed WAN Interface Cards |
| Description | 1-port ISDN BRI NT1 HWIC REMANUFACTURED |
| Price | 580.69 USD |
| Last Update | 2021-11-01 |
