| 摘要 |
PURPOSE:To easily realize special charging at the number guide service charging by expanding low-order 3 digit of dial number of a toll originating call and discriminating whether or not the low-order 3-digit is the toll number guide call. CONSTITUTION:If a number guide in a Tokyo district is called from a district, a subscriber dials 03-104. When an outgoing register 1 receives the final number, the connection marker 2 is started. Since the received dial digit number is 4 digits of '3104', the telephone number reception digit relay 4DR is operated by a telephone number reception relay contact d-, the contact 4dr is sent to the translator 3. In the translator 3, since the toll telephone guide call has low-order 3 digits of 104, the toll telephone number guide call is discriminated by the circuit of resistor lamp RL tog-4dr... b1 cu-d4* toll telephone number guide relay OPD of the translator from the -48V of the connection marker 2. Thus, the special charging is attained.
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