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HWIC-4B-S/T
4-port ISDN BRI High-Speed WAN Interface Card Cisco Router H...
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HWIC-4B-S/T is a high-speed WAN interface card designed for Cisco Integrated Services Routers. It delivers four B-channel ports via RJ-45 connectors engineered for T1/E1 deployments, providing both voice and data connectivity with support for essential protocols such as PPP and HDLC. The module’s compact HWIC form factor allows it to be directly installed in compatible Cisco routers, ensuring a seamless upgrade to routed WAN interfaces.
HWIC-4B-S/T offers reliable performance and flexible integration, making it ideal for environments that demand improved WAN connectivity and enhanced voice services. Its proven design supports mission-critical applications—from expanding small branch offices to reinforcing data center network scalability—while meeting industry standards for power efficiency and operational durability.
HWIC-4B-S/T price is $530.00, a 66.9% saving from the Cisco list price of $1,600.00. HWIC-4B-S/T is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for HWIC-4B-S/T for additional pricing. Browse the full Router Ehwic Wan Cards series or explore all Cisco products.
Deploy the HWIC-4B-S/T-4-port ISDN BRI High-Speed WAN Interface Card on Cisco ISR routers at distributed retail or finance branches to provide automatic ISDN-based failover when primary MPLS or broadband links fail. Outcome: seamless connectivity, <99.99% uptime, simplified SLA compliance and reduced revenue loss during outages.
Use the HWIC-4B-S/T-4-port ISDN BRI card on Cisco routers to connect remote oil-and-gas field offices or temporary project sites—where DSL or fiber isn’t available—to headquarters via ISDN BRI. Outcome: reliable, encrypted WAN access at up to 512 Kbps aggregated bandwidth, ensuring real-time data collection and operational continuity.
Integrate legacy TDM PBX systems into Cisco Unified Communications by terminating up to four ISDN BRI lines on the HWIC-4B-S/T-4-port card. Outcome: cost-effective VoIP trunking, phased migration to IP telephony, preservation of existing voice infrastructure and accelerated ROI.
To get the detailed certification, please go to the Compliance Center.
 HWIC-4B-S/T |  HWIC-4ESW |  HWIC-4T1/E1 |  HWIC-D-9ESW-POE |  HWIC-CABLE-D-2 | |
|---|---|---|---|---|---|
| Product Type | Network Module / Network Card | Network Module | WAN Module | Network Module / Network Card | Network Module |
| Module Type | WAN Module | Ethernet Switch Module | T1/E1 | Ethernet | WAN |
| Data Rate | 64Kbps per B-channel | 10/100 Mbps | 1.544Mbps / 2.048Mbps | 10/100Mbps | 1Gbps |
| Connector Type | RJ-45 | RJ-45 | RJ-48 | RJ-45 | RJ-45 |
| Supported Protocols | PPP / HDLC | TCP/IP | PPP/HDLC | TCP/IP, Ethernet | TCP/IP |
| Form Factor | HWIC | Modular | Modular (HWIC) | HWIC | Modular |
| Operating Temperature | 0 to 55°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 70°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | N/A | 3.3V | N/A | 3.3V |
| Compatibility | Cisco Integrated Services Routers | Cisco Routers | Cisco | Cisco Integrated Services Routers | Cisco |
| Max Speed | 64Kbps per B-channel | 100Mbps | 1.544Mbps / 2.048Mbps | 100Mbps | 1Gbps |
| Supported Features | Integrated voice and data, QoS, call admission control | Auto-negotiation, QoS | N/A | PoE, VLAN, Auto-negotiation, QoS | Auto-negotiation / Wake-on-LAN / Jumbo Frames / QoS |
| Power Consumption | N/A | N/A | N/A | 15W | N/A |
| Interface Ports | RJ-45 | Ethernet | T1/E1 | RJ-45 | Ethernet |
| Expansion Slots | HWIC slot | EHWIC | EHWIC | HWIC | EHWIC |
| Product Name | Cisco HWIC-4B-S/T | HWIC-4ESW | HWIC-4T1/E1 | Cisco HWIC-D-9ESW-POE | HWIC-CABLE-D-2 |
| Height | N/A | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | N/A | N/A |
| Depth | N/A | N/A | N/A | N/A | N/A |
| Weight | N/A | N/A | N/A | N/A | N/A |
The HWIC-4B-S/T module provides reliable ISDN BRI connectivity. It supports four BRI connections, ensuring stable data transfer and improving our communication system.
We've been using the HWIC-4B-S/T for months. It's a reliable ISDN BRI solution, offering four BRI connections for stable, efficient communication.
The HWIC-4B-S/T module is perfect for expanding our ISDN BRI connections. It ensures reliable, high-speed communication for all our remote offices.
The HWIC-4B-S/T has improved our communication system. It offers four stable BRI connections, ensuring smooth, uninterrupted communication across our infrastructure.
The HWIC-4B-S/T is an essential part of our network. It supports four ISDN BRI connections, providing reliable, high-speed communication for our operations.
The Cisco HWIC-4B-S/T is a 4-port ISDN BRI High-Speed WAN Interface Card that provides reliable digital WAN connectivity for Cisco routers by supporting up to 128 kbps per port.
The HWIC-4B-S/T is compatible with Cisco 1800, 2800, 2900, 3800, and 3900 Series routers that have an available HWIC slot.
It offers four RJ-45 S/T BRI ports, each supporting an aggregate of 128 kbps over two 64 kbps B-channels plus a 16 kbps D-channel for signaling.
Power off the router, insert the module into an available HWIC slot, secure the retention screws, power on, and verify installation with the "show inventory" command.