I want to connect two Routers with a WIC-1T over X21 bach-to-back. Does this work with a CAB-SS-X21FC and a CAB-SS-X21MT for testing pupose? I know that will have to configure the clockrate on the DCE side.
The WIC-1T has a DB60 interface. The cables you listed use the smart serial connector so they will not work. The following cables should work.
DB15F X21 to DB60 CISCO Cable: CAB-X21FC
DB15M X21 to DB60 CISCO Cable: CAB-X21MT