This Southwestern Bell Deluxe Executive Display Cartridge FS 30 was removed in good working order and guaranteed not DOA.

The South Western Bell FS-30 Unit Model#FS30 is Required for Audio on Hold, Music on Hold, display features, or External Paging, and a copy of the installation guide user owners manual is ready for immediate shipment for flat rate $9 in 48 states, a few more for others.

Pictures should show all model information and all questions will be answered promptly.

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Standard Disclaimer:
This Equipment may work with or require a Telephone System or Expansion Module Cartridge Controller usually Telephones that interface standard single analog sets will work alone without such Key Service Unit. Reference documentation for specific compatibility.