Cisco HWIC-1DSU-T1 Voice WAN Interface Card
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Cisco HWIC-1DSU-T1 Interface Card Voice WAN Factory Sealed New

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Part Number#: HWIC-1DSU-T1
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Short Description:
HWIC-1DSU-T1 One-Port T1 Fractional Data Service Unit/Channel Service Unit (DSU/CSU) Wide Area Network (WAN) Wan High-Speed Ethernet Interface Card | Made by Cisco | New Factory Sealed
Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

Product Overview of the Cisco Voice WAN Interface Card

In the ever-evolving landscape of networking technologies, Cisco remains a stalwart provider of cutting-edge solutions. One such offering is the Cisco HWIC-1DSU-T1 Ethernet Interface Card, a versatile component designed to facilitate Voice Wide Area Network (WAN) connectivity. In this comprehensive guide, we will delve into the intricate details of this Ethernet Interface Card, examining its features, functionalities, and the broader context of Voice WAN.

Understanding Cisco HWIC-1DSU-T1

The Cisco HWIC-1DSU-T1 Ethernet Interface Card is a hardware module designed to enhance networking capabilities by providing a seamless interface for T1 connections. T1, short for T-carrier level 1, is a digital transmission service standard that supports voice and data communication over long distances. The integration of this Ethernet Interface Card into Cisco networking equipment augments the device's capacity to handle T1-based communication, enabling efficient voice data transfer across Wide Area Networks.

Key Features of Cisco HWIC-1DSU-T1

T1 Connectivity

The T1/FT1 network technology supported by the HWIC-1DSU-T1 extends its versatility. T1 (Time Division Multiplexing) and FT1 (Fractional T1) are widely utilized in telecommunications for transmitting digital signals. The Cisco HWIC-1DSU-T1's compatibility with T1/FT1 technology makes it adaptable to a variety of network configurations, allowing users to tailor their setups to specific requirements.

Ethernet Interface

The Ethernet capability of the HWIC-1DSU-T1 ensures seamless integration into Ethernet-based networks. Ethernet, a widely adopted networking technology, enables high-speed data transfer and is fundamental to modern communication infrastructures. The incorporation of Ethernet technology in the Cisco HWIC-1DSU-T1 enhances its compatibility with contemporary network setups.

Voice WAN Compatibility

The emphasis on Voice WAN compatibility sets the HWIC-1DSU-T1 apart. With specialized support for voice traffic, the card is optimized for Voice over Internet Protocol (VoIP) applications, ensuring clear and reliable voice communication over WAN connections.

Compact Form Factor

Cisco's commitment to efficiency is evident in the compact form factor of the HWIC-1DSU-T1 card. This space-saving design allows for easy integration into various Cisco routers and switches, making it a practical choice for organizations with limited rack space.


Designed with scalability in mind, the Cisco HWIC-1DSU-T1 Ethernet Interface Card accommodates the evolving needs of growing networks. Its compatibility with a range of Cisco devices makes it a versatile solution that can scale alongside network expansion.


The installation process for the HWIC-1DSU-T1 is user-friendly, featuring a plug-and-play mechanism. This simplifies the integration of the card into existing network infrastructure, reducing downtime and minimizing the need for specialized technical expertise.

Voice WAN Implementation

The integration of the Cisco HWIC-1DSU-T1 Ethernet Interface Card into a network introduces new possibilities for Voice WAN implementation. Voice WAN refers to the deployment of voice communication services over a Wide Area Network, extending the reach of voice-enabled applications beyond local networks. The HWIC-1DSU-T1 plays a pivotal role in realizing the benefits of Voice WAN:

Enhanced Voice Quality

With its specialized support for voice traffic, the HWIC-1DSU-T1 ensures high-quality voice communication over WAN connections. The dedicated T1 link provides the necessary bandwidth and reliability to maintain clear and consistent voice calls.

Reduced Latency

Voice WAN demands low-latency communication to prevent delays and ensure real-time interaction. The HWIC-1DSU-T1's T1 connectivity, known for its low latency characteristics, contributes to a seamless voice experience over extended network distances.

Reliable Connectivity

The reliability of T1 lines, coupled with the robustness of the HWIC-1DSU-T1 card, results in a stable Voice WAN environment. This is crucial for businesses relying on voice communication for critical operations, such as customer support and collaboration.

Scalable Voice Solutions

As networks grow, the scalability of the HWIC-1DSU-T1 becomes instrumental. The card supports the expansion of voice services across geographically dispersed locations, making it a strategic choice for businesses with a regional or global presence.

Integration with VoIP Services

The HWIC-1DSU-T1 seamlessly integrates with Voice over IP (VoIP) services, enabling organizations to leverage cost-effective and feature-rich voice solutions. This integration aligns with the industry trend of transitioning from traditional telephony to modern, IP-based communication.

Connectivity Media: Copper T1

The connectivity media of the HWIC-1DSU-T1 is based on Copper T1. Copper T1 lines leverage copper cables for transmission, offering a reliable and cost-effective solution for network connectivity. This choice of connectivity media enhances the adaptability of the Cisco HWIC-1DSU-T1, making it suitable for various deployment scenarios.

Data Transfer Rate: 1.54 Mbps T1

One of the standout features of the Cisco HWIC-1DSU-T1 is its impressive data transfer rate of 1.54 Mbps, aligning with the T1 standard. This high-speed data transfer capability ensures efficient communication and data exchange across the network, making the HWIC-1DSU-T1 an excellent choice for bandwidth-intensive applications.

Technological Specifications

Form Factor

The Cisco HWIC-1DSU-T1 is designed with a compact form factor, allowing it to seamlessly integrate into Cisco routers and network devices. Its form factor is optimized for space efficiency without compromising performance, making it suitable for deployment in diverse networking environments.


The HWIC-1DSU-T1 is engineered to be compatible with a range of Cisco routers, ensuring a smooth integration process. This compatibility factor adds to the card's flexibility, enabling users to leverage their existing Cisco infrastructure while enhancing their network capabilities.

Interface Type

The interface type of the HWIC-1DSU-T1 is designed to be user-friendly and easily configurable. With a straightforward interface, network administrators can efficiently manage and monitor the card's performance, contributing to the overall simplicity and effectiveness of the networking setup.

LED Indicators

Equipped with LED indicators, the Cisco HWIC-1DSU-T1 provides visual cues for monitoring its status and activity. These indicators offer real-time insights into the card's performance, aiding in troubleshooting and ensuring a proactive approach to network management.

General Information about the Cisco HWIC-1DSU-T1

  • Manufacturer: Cisco
  • Part Number or SKU# HWIC-1DSU-T1
  • Product Type: Interface Card

Technical Information

  • Application/Usage
  • Designed for Wide Area Network (WAN) applications.


  • Total Number of Ports: 1
  • Connector Type: RJ-48
  • Interface Details: 1 x RJ-48 T1/FT1 WAN

Media & Performance

  • Ethernet Technology: Ethernet
  • Network Technology: T1/FT1
  • Connectivity Media: Copper T1
  • Data Transfer Rate: 1.54 Mbps T1

Modem Information

  • Type: DSU/CSU
  • Enclosure Type: Integrated, Plug-in module
  • Interface Type: HWIC
  • Connectivity Technology: Wired

Protocols & Specifications

  • Form Factor: Internal
  • Bus: HWIC
  • Transmit Bit Rate: 1.544 Mbps +/- 50 bps
  • Receive Bit Rate: 1.544 Mbps +/- 100 bps
  • Line Code: AMI, B8ZS
  • AMI One's Density

Safety Approvals

  • UL 60950 (United States)
  • CAN/CSA 22.2, CSA60950 (Canada)
  • GB 4943 (China)
  • AS/NZS 60950 (Australia/New Zealand)
  • EN60950 (Europe)
  • IEC 60950 (International)
  • Interfaces: 1 x modem - T1 - RJ-48
  • Compatible Slots: 1 x HWIC
Environmental Parameters
  • Min Operating Temperature: 32 °F
  • Max Operating Temperature: 104 °F
  • Humidity Range Operating: 10 - 85%
Compatibility Information
  • Explore compatibility with various Cisco router models, including but not limited to:
  • Cisco 1841, 1941, 2801, 2821, 2851, 2911, 2921, 2951, 3825, 3845, 3925, 3925E, 3945, 3945E

Overall, the Cisco HWIC-1DSU-T1 Voice Interface Card is a versatile and powerful component for organizations seeking to enhance voice communication over T1 networks. From its key features to the installation process, compatibility considerations, and various use cases, this comprehensive guide has covered the essential aspects of the HWIC-1DSU-T1. As technology continues to evolve, understanding the capabilities of networking hardware such as the HWIC-1DSU-T1 becomes increasingly important for those involved in network administration, telecommunications, and related fields.

Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

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