This reports whether this SVC's call setup indicated a need for end-to-end timing synchronization between the two endpoints, which matters for circuit-emulation-style calls where the receiving end must recover the exact same clock rate as the sender rather than just receive data reliably. An admin diagnosing timing-sensitive slips or bit errors on a circuit-emulation SVC would check that this negotiated as end-to-end(2) as expected, since a call that came up as not-indicated or not-end-to-end wouldn't provide that clock-recovery guarantee. For example, a DS1 circuit-emulation SVC experiencing periodic frame slips might turn out to have negotiated timing requirements as not-end-to-end(3), explaining the clock drift.