Medallion pn# 1539-10365-00
this will also replace the following discontinued sku's
3961007 (1539-10273-00)=Switch Module, Digital, Rear, '09
3961007.1 (1539-10273-00 (r3...))=Switch Module, MUX, Rear, "v3.5", '09
3961007.2 (1539-10283-00)=Switch Module, MUX, Rear, "v4.0", '09