Question: In a mobile terminated call, when a subscriber has both eMLPP and Call Waiting (CW) subscriptions, what action does a compatible mobile station take if called party pre-emption applies?
Option 1: Automatically accept the waiting call, send a hold message to the network, and await a hold acknowledge before releasing the ongoing call.
Option 2: Immediately release the ongoing call without sending any additional messages to the network and then accept the waiting call.
Option 3: Prompt the called party to manually choose between accepting the waiting call or continuing with the ongoing call.
Option 4: Ignore the pre-emption request and handle the incoming call as per standard CW procedures.
Explanation: According to eMLPP specifications for mobile terminated calls, when a compatible mobile station determines that called party pre-emption applies due to an incoming call with higher priority, it automatically accepts the waiting (higher priority) call. However, to manage the ongoing call gracefully, it sends a hold message to the network. The successful acceptance of the waiting call is contingent upon receiving a hold acknowledge for the ongoing call, ensuring a managed handover between calls.