5YR SUPPORT Total for all OS6900 Chassis models. Includes 24x7 Remote Telephone Support. 24x7 Remote Problem Diagnosis. access to Software Updates and Upgrades. and access to support portal and four (4) hour advance hardware replacement. OmniSwitch 6900 Power Supplies. OmniSwitch 6900 Modules. OS6900-FT-F. and OS6900-FT-R are included in advance hardware replacement.