Question: What is indicated by Cause No. 13 "call completed elsewhere" in a mobile radio interface Layer 3 specification?
Option 1: The call has been cleared due to a network congestion.
Option 2: The called user's device is out of coverage area.
Option 3: The call has been rejected by the called user on all devices.
Option 4: The called user has responded to the call on another device.
Explanation: Cause No. 13 "call completed elsewhere" indicates that the call is being cleared by the network towards the present device because the called user has responded to the call on another device, typically in scenarios where the MSC/VLR is an MSC server enhanced for ICS and performs interworking with SIP.