Question: What does Cause No. 88 "incompatible destination" indicate in a mobile radio interface?
Option 1: The equipment sending this cause has received a request to establish a call with incompatible low layer compatibility attributes.
Option 2: The equipment sending this cause has received a request to establish a call which has both low and high layer compatibility, as well as other compatible attributes.
Option 3: The equipment sending this cause has received a request to establish a call with only high layer compatibility attributes that cannot be accommodated.
Option 4: The equipment sending this cause has received a request to establish a call with no compatibility attributes.
Explanation: Cause No. 88 "incompatible destination" indicates that the equipment sending this cause has received a request to establish a call which has low layer compatibility, high layer compatibility, or other compatibility attributes (e.g., data rate) which cannot be accommodated.