Startechcom db9 to rj45 modular adaptors startechcom gc98mf the startechcom gc98mf modular adaptor features 1 x db9 male connector and 1 x rj45 female connector used for modular rs232 rs422 and rs485 connections the adaptor converts your db9 female connection into an rj45 female connection the adaptor allows for custom serial pin out configurationsbacked by the startechcom lifetime warranty startech gc98mf db9 to rj45 modular adaptor mf