While not a member of any Siemens or ROLM partnership or other affiliation, DeskFlex got its start with the CBX-9004 and 9005 back in 1993. Currently, DeskFlex is available for the:

Siemens ModelsCBX 9005, all Models

A point of pride: DeskFlex handles especially well the LOAD_STBY_MEM_ALL problems frequently encountered on Node 2 of a Model 70.