| 摘要 |
FIELD: information systems. SUBSTANCE: communication system, such as telephone communication system, has at least two coupled devices 1, for example, telephones, computers, telefaxes, designed, among other things, to transmit messages among communication entities, such as computer-aided systems, physical or juridical persons, and also system coupling them and incorporating line sets 2, switchboard 3, and identifier 4. EFFECT: provision for additional conveniences and services for users of information systems. |
