Serial and asynchronous modules provide highly flexible connections for Cisco®1800, 1900, 2800, 2900, 3800, and 3900 Series Integrated Services Routers (ISRs). These modules HWIC-8AS-RS232思科原装线卡模块help customers enable applications such as WAN aggregation, transport for traditional protocols, console servers, and dial access servers. Customers can mix and match modules to tailor cost-effective solutions for common networking problems such HWIC-8AS-RS232思科原装线卡模块as remote network management, external dial-modem access, low-density WAN aggregation, transport for traditional protocols, and high-port-density support.

• HWIC-8AS-RS232思科原装线卡模块 High-Speed WAN Interface Card (HWIC-4T): Four high-speed serial ports (Figure 1A)

• Cisco 4-Port Asynchronous/Synchronous High-Speed WAN Interface Card (HWIC-4A/S): Four low-speed synchronous/asynchronous ports (Figure 1B)

• Cisco 8-Port Asynchronous/Synchronous High-Speed WAN Interface Card (HWIC-8A/S-232): Eight low-speed synchronous/asynchronous ports, EIA-232 only (Figure 1C)

• Cisco 8-Port Asynchronous High-Speed WAN Interface Card (HWIC-8A): Eight asynchronous EIA-232 ports (Figure 1D)

• Cisco 16-Port Asynchronous High-Speed WAN Interface Card (HWIC-16A): Sixteen asynchronous EIA-232 ports (Figure 1E)

• Cisco 32-Port Asynchronous Serial Service Module (SM-32A): Thirty-two asynchronous EIA-232 ports Figure 1F)

Figure 1. Cisco Serial and Asynchronous Modules

Common Applications HWIC-8AS-RS232思科原装线卡模块

WAN Aggregation HWIC-8AS-RS232思科原装线卡模块

Figure 2. WAN Aggregation HWIC-8AS-RS232思科原装线卡模块

Transport for Traditional Protocols

• Systems Network Architecture (SNA) and Synchronous Data Link Control (SDLC) Protocol

• Binary Synchronous Communications (Bisync) Protocol

• X.25 Protocol

Figure 3. Network Convergence

Console and Terminal Server

Figure 4. Managing Multiple Remote Devices from a Single Location

Dial Access Server

Figure 5. Dial Access Server