Cisco 1-Port 56-/64-kbps WAN Interface Card for DDS Networks

Overview

The Cisco HWIC-1DSU-56K4= is a 1-port WAN interface card designed to deliver reliable connectivity for digital data service (DDS) and 4-wire switched 56-kbps networks. It fits into HWIC slots on compatible Cisco routers, enabling seamless integration without the need for external devices. Supporting synchronous data transfer rates up to 64 kbps, this card ensures steady and secure communication for both point-to-point and multipoint network configurations.

Its internal form factor helps maintain a tidy network environment, which is especially valuable in office or data center setups where space and cable management are priorities. The RJ-48 modem interface simplifies connection to DDS lines, making it a practical choice for businesses that depend on dedicated digital circuits for their communications. This interface card provides a dependable solution that fits naturally within Cisco’s hardware ecosystem, supporting legacy network connections and specific digital services.

Key features

• 1-port CSU/DSU WAN interface that supports both 56 kbps and 64 kbps data rates for flexible network use
• Designed for DDS and 4-wire switched networks, ensuring compatibility with established digital communication lines
• Internal form factor allows for clean installation inside Cisco routers, reducing clutter and external hardware
• RJ-48 modem interface provides straightforward and reliable connection to DDS circuits
• Fits into HWIC slots on Cisco routers, simplifying upgrades and expansions without additional adapters
• Supports synchronous data transfer to maintain consistent and secure network communication

Key specs

• Data transfer rate: up to 64 kbps synchronous
• Interface type: 1-port CSU/DSU WAN
• Network support: DDS and 4-wire switched 56-kbps networks
• Connector: RJ-48 modem interface
• Form factor: Internal HWIC card for Cisco routers

Connectivity and compatibility

This WAN interface card is compatible with Cisco routers that feature HWIC slots, allowing easy integration into existing network infrastructures. The RJ-48 modem interface ensures direct connection to DDS lines, which are commonly used in dedicated digital communication setups. This makes the card suitable for environments where legacy digital services remain essential, such as certain enterprise or government networks.

Ideal uses and environments

The HWIC-1DSU-56K4= is well suited to businesses and organizations that rely on stable, dedicated digital circuits for their communications. It fits naturally in office networks and data centers where space efficiency and cable management are important. This card is a strong choice for maintaining legacy DDS connections or supporting specific 4-wire switched network configurations without adding external hardware.