Three types of call back are supported:
-
Link Control Protocol (LCP)
-
After authentication the incoming call is dropped and an outgoing call is made to a predefined number to reestablish the link.
-
Microsoft Callback Control Protocol (CP)
-
After authentication from both ends, the incoming call is dropped and an outgoing call to a predefined number made to reestablish the link.
-
Extended Callback Control Protocol (CBCP)
-
Similar to Callback CP however, the Microsoft application at the remote end will prompt for a phone number. An outgoing call will then be made to that number to reestablish the link.
