Which of the following are correct regarding ISDN?（）

• A、Legacy DDR can use port information to define interesting traffic.
• B、Legacy DDR can configure multiple dialer configurations on the same interface.
• C、Legacy DDR can use ACLs to define interesting traffic.
• D、HDLC or PPP can be used to encapsulate ISDN D channel information.
• E、The BRI interfaces on ISDN routers with dialer profiles configured cannot belong to multiple dialer pools.
• F、Dialer profiles cannot use extended ACLs to define interesting traffic.