sm slot

1 Single-wide SM and 1 Double-wide (top slot) SM. Slot 1, 2. Does not support extension modules. Requires a network module adapter. See “Using Network Modules in Service Module Slots” section. Removing the top right panel for a double-wide SM, the double-wide top slot becomes slot 2. Cisco 3945. 4. 4 Single-wide SMs. or royal99 slot