When you have a problem with Inside Wiring, Coax, Ethernet (CAT5), Telephone Jacks and Data Jacks inside your office, you want it addressed as quickly and efficiently as possible. The Inside Wire Maintenance Plan (IWMP) is an OPTIONAL monthly service for customers that does just that. The Plan ensures that Hawaiian Telcom will send an experienced technician to solve the problem at no cost beyond the regular, monthly charge for inside wire maintenance service.