 The Basic Generic program included constant "audits" to correct errors in the call registers and other data.When a critical hardware failure in the processor or peripheral units occurred, such as both controllers of a line switch frame failing and unable to receive orders, the machine would stop connecting calls and go into a "phase of memory regeneration", "phase of reinitialization", or "Phase" for short.The Phases were known as Phase 1,2,4 or 5.