I was wondering if there was an easy way of programming an Inter-tel 5860 phone for use with headset. Apparently when out company got these, they didn't program them for use with a headset, according to tech support. They're saying they need to log in and do it remotely (with service charge) or have technician come and do it (with bigger service charge). Seems like this should be easy to fix..since the phone has the plug for headsets..or at least should have been programmed as a default. Any help her would be appreciated. Thanks.