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HWIC-1DSU-T1
1-Port T1/Fractional T1 DSU/CSU WAN Interface Card Cisco Rou...
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HWIC-1DSU-T1 is a high-performance WAN module designed specifically for T1 digital services, providing a reliable DSU/CSU interface that integrates seamlessly into Cisco router HWIC slots. It features robust support for T1 line connectivity via an RJ-45 connector, ensuring dependable digital voice and data transmission over leased line circuits.
This module is engineered for critical WAN applications, making it ideal for upgrading network infrastructures and ensuring continuous, high-quality connectivity in enterprise environments. With its compact, modular design and compatibility exclusively with Cisco platforms, the HWIC-1DSU-T1 is purpose-built to meet the rigorous demands of modern digital service deployments.
HWIC-1DSU-T1 price is $481.00, a 65.6% saving from the Cisco list price of $1,400.00. HWIC-1DSU-T1 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for HWIC-1DSU-T1 for additional pricing. Browse the full Router Ehwic Wan Cards series or explore all Cisco products.
In a multi-site enterprise, the HWIC-1DSU-T1-1-Port T1/Fractional T1 DSU/CSU WAN Interface Card in a Cisco ISR router provides a dedicated fractional T1 link to back up primary MPLS or broadband circuits. When the primary link degrades or fails, the router automatically switches to the Fractional T1 interface, ensuring uninterrupted data access, predictable performance, and streamlined network management. Benefit: Delivers high-availability connectivity and consistent SLAs without costly full-rate T1 circuits.
A healthcare provider uses the HWIC-1DSU-T1-1-Port module in Cisco ISR routers to terminate a dedicated T1 line for VoIP traffic between satellite clinics and headquarters. By allocating fixed T1 timeslots exclusively for voice, the solution guarantees low latency, jitter under 5 ms, and <1% packet loss—meeting HIPAA requirements for secure, real-time communications. Benefit: Enables reliable, carrier-grade voice services with end-to-end QoS assurance on existing router infrastructure.
A nationwide retailer deploys the HWIC-1DSU-T1-1-Port T1/Fractional T1 DSU/CSU card in Cisco branch routers to link remote stores to a centralized ERP and POS host over a dedicated T1 circuit. The DSU/CSU interface provides a hardened, in-line clock reference and full-rate or fractional channelization, ensuring PCI DSS compliance and secure transaction processing. Benefit: Achieves dependable bandwidth, streamlined monitoring, and simplified PCI audits using existing network gear.
To get the detailed certification, please go to the Compliance Center.
| HWIC-1DSU-T1 |  HWIC-3G-GSM |  HWIC-1FE |  HWIC-4A/S |  HWIC-1T | |
|---|---|---|---|---|---|
| Product Type | WAN Module | Network Module | Network Module | Network Module | Network Module / Network Card |
| Module Type | WAN | WAN | Ethernet | WAN | Ethernet |
| Data Rate | N/A | N/A | 100Mbps | 1Gbps | 1Gbps |
| Connector Type | RJ-45 | N/A | RJ-45 | RJ-45 | RJ-45 |
| Supported Protocols | N/A | TCP/IP | TCP/IP | TCP/IP, iSCSI | TCP/IP |
| Form Factor | Modular | Modular | Modular | Modular | Modular |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco | Cisco | Cisco | Cisco | Cisco, Juniper, Arista, Dell, HP |
| Max Speed | N/A | N/A | 100Mbps | 1Gbps | 1Gbps |
| Supported Features | N/A | N/A | Auto-negotiation / Jumbo Frames / QoS | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation, Jumbo Frames, QoS |
| Power Consumption | N/A | N/A | N/A | 5W | 5W |
| Interface Ports | N/A | N/A | Ethernet | Ethernet | Ethernet |
| Expansion Slots | EHWIC | EHWIC | EHWIC | EHWIC | HWIC |
| Product Name | HWIC-1DSU-T1 | HWIC-3G-GSM | HWIC-1FE | HWIC-4A/S | HWIC-1T Ethernet WAN Interface Card |
| Height | N/A | N/A | N/A | N/A | 0.5 inches |
| Width | N/A | N/A | N/A | N/A | 3.4 inches |
| Depth | N/A | N/A | N/A | N/A | 4.2 inches |
| Weight | N/A | N/A | N/A | N/A | 0.3 lbs |
The HWIC-1DSU-T1 offers excellent T1 connectivity. It's been reliable, delivering stable and consistent performance for our network.
This card integrates seamlessly with our Cisco routers. The HWIC-1DSU-T1 offers stable T1 connectivity for our remote office needs.
The HWIC-1DSU-T1 has been essential in ensuring reliable T1 communication in our office. It's easy to install and has shown great performance.
We depend on the HWIC-1DSU-T1 for its stability and reliability. It's a great choice for T1 connectivity in our office network.
The HWIC-1DSU-T1 has proven to be a dependable option for T1 WAN connections. It delivers consistent performance and smooth integration.
The Cisco HWIC-1DSU-T1 is a high-speed WAN interface card that provides a single T1 or fractional T1 DSU/CSU port for Cisco ISR routers, enabling reliable enterprise-grade connectivity.
The HWIC-1DSU-T1 is compatible with Cisco 2800, 2900, 3800 and 3900 Integrated Services Routers, delivering seamless integration into existing network infrastructures.
The HWIC-1DSU-T1 supports full-rate T1 at 1.544 Mbps and fractional rates as low as 64 Kbps, accommodating diverse WAN bandwidth requirements.
This WAN interface card features an RJ-48C connector for direct T1 circuit termination with DSU/CSU timing and line coding built in.
Power off the router, insert the HWIC-1DSU-T1 into an available HWIC slot, secure the mounting screw, then power on and verify the interface with 'show hwic'.
In global config mode, enter 'interface serial 0/0/0', set 'encapsulation hdlc', define 'clock rate 1544000', and apply 'no shutdown' to activate the T1 link.
Yes, the HWIC-1DSU-T1 supports fractional T1 configurations down to 64 Kbps, allowing cost-effective allocation of WAN bandwidth.
The HWIC-1DSU-T1 consumes up to 2.5 watts and draws no external power beyond the host router’s HWIC slot supply.
Operating temperature range is 0°C to 40°C with relative humidity between 10% and 90% non-condensing, per Cisco hardware environmental standards.
No additional IOS license is needed; the HWIC-1DSU-T1 operates under the router’s existing WAN or data feature set license.
Key features include integrated DSU/CSU, RJ-48C T1 port, support for full and fractional T1, built-in diagnostics, and Cisco IOS management.
Use Cisco IOS commands like 'show interface serial' and 'show controllers t1' to view line status, errored seconds, and alarm conditions in real time.
No, the HWIC-1DSU-T1 is not hot-swappable. You must power down the router before inserting or removing the module.
The HWIC-1DSU-T1 includes an integrated DSU/CSU, whereas the HWIC-1T1 requires an external CSU/DSU for T1 line termination.
Ideal use cases include enterprise branch office connectivity, legacy voice gateways, point-to-point WAN links, and managed service provider deployments.
Order using Cisco SKU HWIC-1DSU-T1. Reference this part number when purchasing through authorized Cisco resellers or direct distribution channels.