The DataPro 6625 is a replacement cable for the Cisco CAB-SS-232MT cable, one of the Cisco family of "Smart Serial" cables.
The router end terminates in a Foxconn High-Density 26-pin connector (DF26M), the WAN end terminates in a 25-pin male DSUB connector (DB25M).
Custom lengths are available, up to 10 feet.