Cisco serial interface cable

This is a Cisco serial interface cable, specifically a DB25-to-DB25 serial cable often used with older networking equipment. What you’re looking at: Both ends are DB25 connectors (25-pin). The connectors have screw locks to secure them tightly. The branding shows Cisco, which confirms it’s meant for Cisco devices. The thick, shielded cable suggests it’s used for data communication, not simple console access. Common uses: Connecting routers to CSU/DSU units WAN serial connections (like V.35 / RS-232 interfaces) Legacy enterprise networking setups