Cisco WIC-1B-U-V2 ISDN Basic Rate Interface (BRI) U WAN Interface Card Version 2 with internal NT-1, 1-Port RJ-45
(1) ISDN BRI port (U interface, internal NT-1), (1) RJ-45 connector. Can go into slot W0 or W1 of the 1E2W, 2E2W, and 1E1R2W network modules, Supported in NM-1FE1R2W, NM-1FE2W, NM-2FE2W, and NM-2W, Cannot mix in same Network module with a WIC36-1B-U WIC. Provides NT-1 status information on the IOS show controller command.
Cisco WIC-1B-U-V2 inserts into a mixed-media network module or directly into the WIC slot on the Cisco 1700, 2600, 3600, 3700 chassis. Supported on 1700, 2600, 3600, 3700. Cannot be used with Cisco 1600 Series or the Cisco 1750. Does not support hot swap.