Mitel SX-2000 - Manual (Page 48)

SX-200 General Information Guide
34 Revision A 50003510
System Fail Transfer
System Fail Transfer (SFT) (or power fail transfer) is provided by the SFT control port, allowing
preselected DTMF or rotary telephones to be connected directly to CO trunks in the event of
system failure in the system. To provide system fail transfer, an external SFT unit or SPINE
Bay LS/CLASS trunks are required.