Cisco - Serial RS-449 cable (DTE) - Smart Serial (M) to DB-37 (M) - 10 ft - refurbished - for P/N: HWIC-4A/S-RF/ HWIC-4T-RF/ NM-CEM-4SER-RF/ SPA-4XT3/E3/ WIC-2T= PRO/ WIC-2T-OEM=