Question: In Telecommunication Performance Management, what condition excludes a successful out-of-band codec negotiation from being counted in the 'Successful out of band codec negotiation number' measurement when the originating MSC-S adopts G.711?
Option 1: The terminated MSC-S must also adopt G.711 for the voice call.
Option 2: Mid-call receipt of an 'APM' message with 'Selected Codec' equal to a codec other than G.711 is required.
Option 3: No condition is specified; all negotiations are counted regardless of codec selection.
Option 4: The negotiation establishment is excluded if the originating MSC-S adopts G.711 and the mid-call 'APM' message shows 'Selected Codec' as G.711.
Explanation: This answer is correct because, in the provided context, if the originating MSC-S adopts G.711 and the mid-call 'APM' message indicates 'Selected Codec' as G.711, this negotiation establishment is specifically excluded from the successful out-of-band codec negotiation measurement.