Cisco® 4400 Series Integrated Services Router Network Interface Modules (ISRNIMs) provide highly reliable synchronous serial WAN connections for remote sites. These interfaces use well-known point-to-point WAN protocols such as High-Level Data Link Control (HDLC) and Point-to-Point Protocol (PPP) as well as Frame Relay, offering cost-effective virtualized WAN connections in both point-to-point and point-to-multipoint designs. You can mix and match NIMs to tailor cost-effective solutions for common networking solutions for low- and high-density WAN aggregation.. Network. Supported protocols. EIA-232, EIA-449, EIA-530, EIA-530A, V.35, and X.21. Data transmission. Bandwidth. 0.08 Gbit/s. Performance. Compatibility. Cisco 4400
