Our standard interface cables are 15 feet in length. This length is not required to keep the JPS gateway from interfering with the radio (in fact, we are FCC Part 15 Certified). This is actually to help facilitate the appropriate separation of radios when connected to our multi-channel gateway products. If wanted, you can order interface cables from us in custom lengths. Please contact email@example.com for more information, or firstname.lastname@example.org for pricing information.