The 644LX is a the manufacturer industrial component. Key specifications include fsc_application_data: TELEPHONE AND FACSIMILE EQUIPMENT, general_characteristics_item_description: 0.562 IN. WIDTH,1.156 IN.

LENGTH IN. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5815-00-701-5488, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.