Dell GVC F-1156IV/R9F 56K V.90 Data/Fax Internal PCI Modem. Dell part number: 04M460.
 

Manufacturer: GVC

Part Number: F-1156IV/R9F

Interface: PCI

Bracket: Low profile

Packaging: OEM (does not include the driver cd or any other accessory)

Compatible with: OptiPlex GX150, OptiPlex GX150 Desktop, OptiPlex GX150 Mini-Tower, Optiplex GX150 Small Form Factor, OptiPlex GX150 Ultra Small Form Factor, OptiPlex GX240, OptiPlex GX50, OptiPlex GX50 (1.2 Ghz and above), OptiPlex GX50 (R2), OptiPlex GX50 (Under 1.2Ghz), OptiPlex GX60, OptiPlex GX60 Desktop