This connector cable is designed for most common applications using manual and automatic switchboxes. It features exclusive wiring technology to ensure optimal performance and data transfer. Molded strain relief and PVC overmolding provide durability for Connects Devices (From/To): PC to Serial Modem; Connector/Port: DB 25 Female, DB 25 Male; For Device Type: DB25 Cable Assembly, PC, Serial Modem, Mac; Cable Type: Extension Straight Through.