- One ISDN BRI port (S/T interface, requires external NT−1)
- RJ−45 connector
- Supported on Cisco 1600, 1720, 2600, 3600 or 3700 series
- Cannot be used with Cisco 1603 or 1604 base units
- Does not support hot swap, however no hardware damage occurs if it is swapped while power is on
- Can go into slot "W0" or "W1" of the 1E2W, 2E2W, and 1E1R2W
- Supported in NM−1FE1R2W, NM−1FE2W, NM−2FE2W, NM−2W
The WIC-1B/ST offers a single ISDN BRI S/T−interface. It requires an external NT−1 that depends on the region of the world. The WIC inserts into a mixed−media network module or directly into the WIC slot on the Cisco 1600, 1700, 2600, 3600 or 3700 chassis.
The ability to add BRI connectivity via a WIC lets administrators maximize valuable slot space while it provides additional connectivity options, such as Ethernet, on the same module.