The Rolm Phonemail MSC Circuit Card Assembly, identified by part numbers 49317A and 97D9270, is a dedicated circuit-card subassembly that provides the MSC interface within Rolm Phonemail equipment. Public documentation and retailer listings identify this card as MSC Card P/N 49317A (and 49317), confirming its place in the Rolm Phonemail MSC family for legacy Phonemail installations. As a circuit card assembly, it consists of a single printed circuit board used as a replacement subassembly to support the MSC functionality in the Rolm Phonemail system.
