This read-only octet string (up to 32 characters) reports the operator-identifying trail trace text actually being received right now on an OTU2e (enhanced OTU2, roughly 11.1 Gb/s) trunk carrying an oversized client signal such as 10GbE LAN. An administrator compares this live value against the configured expected operator string to confirm the incoming signal genuinely originates from the intended carrier's equipment. For example, if OTU2e reports a received operator string that does not match the expected value, that discrepancy is treated as evidence of an unintended cross-connection to a different operator's network.