| 摘要 |
Digital communication system, for example ISDN or ISPABX, comprising at least one exchange and at least one user station, which exchan ge communicates with the user station by at least a D channel and a B channel, a service station being connected to the exchange, each user station comprising a processor in which, for example, the telephone number (DNR directory number) of the servi ce station is stored, the programming information available at the service station being transmitted to the user station over the B channel.
|
