| 摘要 |
The invention relates to a method and an equipment to establish both telephone and digital communication through an interface between a subscriber unit (1) and a Local Exchange (LE) on a telecommunication line intended for digital traffic, for instance an ISDN-line. For the telephone communication, the subscriber unit (1, 3, 4) and the Local Exchange (LE) are communicating by transmitting packages according to a protocol comprising PSTN speech communication together with at least service functions through an interface between the subscriber unit and the Local Exchange.
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