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.. Features. Compatible products. Cisco 4451-X. Supported network protocols. T1/E1. Number of connectors. 2. Product type. Voice network module. Operational conditions. Storage relative humidity (H-H). 5 - 95%. Operating relative humidity (H-H). 10 - 85%. Storage temperature (T-T). -20 - 65 °C. Operating temperature (T-T). 0 - 50 °C. Weight & dimensions. Weight. 191 g. mmo_20020277_1498716665_3848_8214.pdf
