Hi Mark, Usually the SCM and the chassis match up. In cases where this is not true, due to swapping, the features follow the SCM and the S/N of the SCM is what shows up on a 'get base' and is what is used for 'hashed' features/options. Hope this helps, - David -----Original Message----- From: Mark Frater [mailto:mfrater at quicksilver.co.nz] Sent: Sunday, September 15, 2002 9:01 PM To: rte-ascend at lists.real-time.com Subject: [Ascend] TNT enabled features / options Hi List, If you swap the Shelf controllers between two TNTs, do all the enabled features follow the SC and work ok with a new chassis or are the enabled features dependent upon chassis serial number? Mark