Cisco 2821 router with VWIC2-2MFT-G703 (a 2-port G.703 card), ISDN switch type is NET5, no DSPs are installed, IOS 15.0 I am trying to configure ISDN PRI for data calls only (no voice), but I get following error: vtpR01t(config)#card type e1 0 2 vt...