Specifications
| Brand headquarters / origin | Cisco / USA |
|---|---|
| Model | HWIC-1T |
| Interface | 1 × Cisco Smart Serial port |
| Synchronous speed | Up to 8Mbps |
| Asynchronous speed | Up to 115.2kbps |
| Serial protocols | EIA-232, EIA-449, EIA-530, EIA-530A, V.35 and X.21 |
| Functions | Synchronous/asynchronous operation, Bisync and network clock synchronization |
| Supported routers | 1841, 1941, 2801, 2811, 2821, 2851, 2901, 2911, 2921, 2951, 3825, 3845, 3925 and 3945 per platform table |
| Unsupported example | Cisco 1861 |
| Software | IP Base minimum; compatible Cisco IOS release required by platform |
| Form factor | Singlewide HWIC |
| Dimensions (H × W × D) | 21 × 79 × 142mm |
| Operating temperature | 0–40°C; NEBS short-term up to 50°C per datasheet |
| Storage temperature | −20–65°C |
| Humidity | 10–90% RH, non-condensing |
| Power | Supplied by a compatible host-router slot |
| Optional cabling | Matching Cisco Smart Serial DTE/DCE cable selected for the interface protocol and connector |
Key Features
- Add a serial WAN interface to a compatible Cisco router.
- Support synchronous links up to the documented 8Mbps limit.
- Use asynchronous operation for supported serial applications.
- Select a Smart Serial cable suited to the remote interface.
- Integrate the connection into the host router’s Cisco IOS management.
Product Information
HWIC-1T adds one serial interface to supported Cisco Integrated Services Routers. It uses Cisco Smart Serial cabling and supports synchronous operation up to 8Mbps and asynchronous operation up to 115.2kbps. Supported electrical interfaces depend on the selected cable.
Verify the host-router model, available HWIC slot, Cisco IOS release and cable type before installation. This is a serial card, not the separate HWIC-1DSU-T1 module with a built-in T1 CSU/DSU. The required DTE or DCE cable is an optional selection; no cable is claimed as included. The module receives operating power from its compatible host.




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