The Partner ACS R5.0 012E Expansion Module provides 12 ETR (Enhanced Tip/Ring) station ports and zero CO Lines to the Partner ACS R5.0. The 012E Module will provide the capability for a Partner ACS R5.0 to support a maximum of 48 stations. The new Partner 012E module will only work with the ACS R5.0. Older Partner ACS systems will require a software upgrade (1326-020) LUC-700191323 allowing for the installation and use of the new 012E (60559) module.