Cisco 4000 Series 4-Port Synchronous Serial Network ModuleThe NP-4T network module has four synchronous serial interfaces. All ports use identical DB-60 connectors that support five interface types (RS-232, RS-449, RS-530, V.35, X.21) in either DTE or DCE mode.Compatible with the following Cisco routers:4000-M Series4500-M Series4700-M Series
