Cisco HWIC-4A/S 4-Port High-Speed WAN Interface Card

BRAND NEW. FACTORY SEALED. FULL CISCO WARRANTY INCLUDED. MANUFACTURED BY CISCO. FROM CHICAGO COMPUTER SUPPLY

Overview

The Cisco HWIC-4A/S is a high-speed serial WAN expansion module designed to support legacy and synchronous WAN connectivity across enterprise and branch router deployments. It provides four serial ports supporting X.21 and V.35 protocols, enabling reliable communication with carrier networks and legacy WAN infrastructures.

Built for flexibility, this plug-in module allows organizations to extend the life of existing serial-based WAN circuits while maintaining stable, predictable performance. It integrates seamlessly into supported Cisco Integrated Services Routers without disrupting existing network configurations.

Key Features

• Four high-speed serial WAN ports
• Supports X.21 and V.35 protocols
• RS-232, RS-449, RS-530 interface support
• Plug-in HWIC form factor for easy installation
• Designed for synchronous WAN connectivity
• Cisco-genuine enterprise hardware

Technical Specifications

Device Type: High-Speed WAN Interface Module

Model: HWIC-4A/S

Form Factor: Plug-in Module

Ports: 4 × Serial WAN

Supported Protocols: X.21, V.35

Interfaces: RS-232, RS-449, RS-530, V.35, X.21

Maximum Data Rate: 256 Kbps

Compatible Slot: 1 × Expansion Slot

UPC: 00074632092016

Use Cases

The Cisco HWIC-4A/S is best for environments where legacy synchronous serial WAN circuits remain critical to operations. Many enterprise branch offices continue to rely on X.21 or V.35 connections for leased lines, private carrier circuits, or regulated industry networks. This module allows organizations to maintain those connections while upgrading their core routing platforms.

It also plays a key role in migration scenarios. Businesses transitioning from older serial-based infrastructures to modern Ethernet WANs often deploy the HWIC-4A/S to ensure uninterrupted service during phased upgrades. In industrial, utility, and government environments where certified serial links are still mandated, the module provides stable, standards-compliant connectivity without requiring a complete infrastructure overhaul.

Why Choose Cisco HWIC-4A/S

• Extends the life of legacy serial WAN infrastructure
• Supports multiple synchronous serial standards
• Reliable performance for mission-critical WAN links
• Broad compatibility with Cisco ISR platforms
• Backed by Cisco enterprise-grade engineering

FAQs

What protocols does the HWIC-4A/S support?

It supports X.21 and V.35 serial WAN protocols, as well as RS-232, RS-449, and RS-530 interfaces.

How many ports are available on this module?

The module provides four high-speed serial WAN ports.

Is this suitable for legacy WAN environments?

Yes. It is designed specifically for environments that still rely on synchronous serial WAN connections.

Which routers are compatible with HWIC-4A/S?

It is compatible with a wide range of Cisco Integrated Services Routers across multiple series.

Is this an original Cisco module?

Yes. It is Cisco-genuine hardware and ships with full Cisco warranty coverage.