Paragraph 51 DEFINITIONS OF TERMS IN THIS ANNEX
“Fast select” (4 5) means a facility applicable to virtual calls which allows a data terminal equipment to expand the possibility to transmit data in call set-up and clearing packets beyond the basic capabilities of a virtual call.
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N.B.: “Packet”: a group of binary digits including data and call control signals which is switched as a composite whole. The data, call control signals and possibly error control information are arranged in a specified format.