B4545 MFP UPG & 1YR ON-SITE WTY EXTN Oki is proud to offer Service Enhancement Programs designed to maximize the uptime of your Oki printer and facsimile products. The Warranty Extension Program (WEP) is available to you at the time of printer purchase through the 90th day of ownership and provides the same and/or upgraded coverage you receive under your printers' standard warranty.