Which of the following descriptions are wrong? (Multiple choice)

Which of the following descriptions are wrong? (Multiple choice)
A . eSRVCC optimizes the near-end session update process, and the media switch point is changed to the called side network element, which shortens the switch duration.
B . In order to support VOLTE in an LTE network, IMS and PCRF network elements need to be configured.
C . EPS bearer is a LTE network QoS basic management unit, if necessary in LTE network to provide different QoS service, it is necessary to establish different EPS bearers
D . In a network that supports LTE VoIP, if dual AP configuration is used, only one default EPS bearer will be established each time the power is registered.

View Answer

Answer: AD