The 4-Port Async/Sync Serial HWIC provides four serial async/sync ports using Smart Serial connectors and cabling. Each port can operate up to 256 Kbps in sync mode, or up to 230.4 Kbps in async.
- General Information
 - Manufacturer
 - Cisco Systems, Inc
 
- Manufacturer Website Address
 - http://www.cisco.com
 
- Brand Name
 - Cisco
 
- Product Type
 - HWIC
 
- Technical Information
 - Application/Usage
 - Wide Area Network
 
- Interfaces/Ports
 - Total Number of Ports
 - 4
 
- Connector Type
 - Smart Serial
 
- Interfaces/Ports Details
 - 4 x Smart Serial Asynchronous/Synchronous Serial WAN
 
- Media & Performance
 - Maximum Data Transfer Rate
 - 256 kbit/s
 
- Physical Characteristics
 - Height
 - 0.8"
 
- Width
 - 3.1"
 
- Depth
 - 5.6"
 
- Miscellaneous
 - Additional Information
 - DCN (Data Communications Network)
 - Serial & Legacy Concentration
 - Bi-synchronous Support
 
Interfaces supported:
- In both DTE and DCE formats: V35, X.21, RS-232, and RS-449
 - In DTE format only: EIA-530 and EIA-530A
 
- Compatibility
 Supported Platforms & Minimum IOS Versions:
- Cisco 2851 - 12.3(14)T
 - Cisco 2821 - 12.3(14)T
 - Cisco 2811 - 12.3(14)T
 - Cisco 2801 - 12.3(14)T
 - Cisco 1841 - 12.3(14)T
 - Cisco 3845 - 12.3(14)T
 - Cisco 3825 - 12.3(14)T