Use the JMI Motofocus HUSC Hand Unit Cable Adapter Set to convert the HUSC's 3.5mm plug into a standard RJ11 phone plug, allowing you to extend the length of its cord using a regular telephone cord. The set consists of two separate adapters:
The first adapter has a 3.5mm female socket that accepts the HUSC's stock cable with an RJ11 outlet on the other for the phone line extensionThe second adapter has an RJ11 outlet for the other end of the phone line with a 3.5mm male plug that gets inserted into the Motofocus motor unit