| http://www.w3.org/ns/prov#value | - In such a system as above, an outgoing route information transfer program is provided in the central controller of the local unit and started periodically, whereby the use condition of each VPI in this local unit is checked and an outgoing route control signal having as parameter, for example, a 2-bit value to be set in the outgoing call management table 182 is transmitted.
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