DLF Schema for Dialup service The dialup DLF schema represents each connection attempt with one DLF record. The time at which the dial up connection started. Telephone number of the local telephone. Telephone number which is being called. The duration of the dial up connection. Direction of the connection. Inbound connections are those in which is machine on which the log is recorded is called, while in outbound connections the machine makes the call. The type of the connection: speech or data. The status of the connection: busy, ring, failed or connected. A failed connection happens when the dialed telephone number does not exist (is unallocated). The status of the connection: no_answer, unallocated or normal. An unallocated telephone number is a number that does not exist. The total cost of the dial up connection. The currency in which the cost is expressed.