These flexible interface cards support multiple integrated data and voice applications, facilitating the migration from data-only as well as circuit-switched voice services to a packet voice solution.
Introduction
The Cisco® Fourth-Generation 1-, 2-, 4-, and 8-Port T1/E1 Multiflex Trunk Voice and WAN Network Interface Modules (NIMs) support data and voice applications on the Cisco 4000 Integrated Services Routers (Figure 1). These cards combine WAN-interface-card (WIC), voice-interface-card (VIC), ISDN Primary Rate Interface (PRI), dial-access integration, and channelized-data (CE1T1) functions to provide superior flexibility, versatility, and investment protection through their many uses. Customers who choose to integrate data and voice in multiple steps preserve their investment in a T1/E1 WAN interface. More information: Network | Supported network protocols | T1/E1 | Operational conditions | Operating temperature (T-T) | 0 - 50 °C |  | Storage temperature (T-T) | -20 - 65 °C | | Operating relative humidity (H-H) | 10 - 85 % | | Storage relative humidity (H-H) | 5 - 95 % | Technical details | Number of connectors | 2 | | Compatibility | Cisco 4451-X | Weight & dimensions | Weight | 191 g |
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