The present disclosure provides for electrical connectors or jack assemblies/housings for use in voice/data communication systems. More particularly, the present disclosure provides for modular jack assemblies that include a movable locking member. The present disclosure provides for improved systems/designs for jack assemblies/housings that are easily secured and/or unsecured to or from a jack panel or jack faceplate. In exemplary embodiments, the present disclosure provides for convenient, low-cost and effective systems and methods for easily securing and/or unsecuring jack assemblies/housings to or from a jack panel/faceplate (e.g., in the field) by utilizing advantageous modular jack assemblies that include a movable locking member, and related assemblies.