| 摘要 |
A method for setting a supervisory control circuit includes a link establish requesting process wherein a first network element transmits a link establish request to a second network element via an unused channel, and a link establish responding process wherein the second network element that receives the link establish request decides a channel for establishing a supervisory control line and transmits a link establish response to the first network element via the decided channel. The method for the setting supervisory control line further includes a connection establishing process wherein the first network element that receives the link establish response allocates the channel that transmits the link establish request as a channel for establishing the supervisory control line.
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