Some SONET / SDH rings have two sets of bidirectional links between nodes.
2.
It works as a basic bidirectional link with the Japanese ground-controlled intercept network, and it is limited because it is not a true network.
3.
In turn, histamine evokes the release of substance P and calcitonin gene-related peptide; thus, a bidirectional link between histamine and neuropeptides in neurogenic inflammation is established.
4.
Later, as founder, CEO, CTO and Chairman of the Board of Xanadu Operating Company, Roger led design and development of a hypertext technology that includes quotable documents with version control, fine-grained, bidirectional links, the ability to track intellectual property rights, and a mechanism to pay royalties.