| http://www.w3.org/ns/prov#value | - Integrated service digital networks (ISDNs) have characteristics specified by numerous ISO, CCITT/ITU-T standards; such networks are organized as a plurality of B and D type transmission channels together with corresponding protocols; B channels (circuit mode) are dedicated mainly to carrying messages or data to be communicated; D channels (packet mode) are dedicated mainly to carrying signalling
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