| 摘要 |
An integrated services communication system ISDN in which a plurality of ISDN supported terminal stations can be coupled to an S0 bus coupled to a private branch exchange, of which a maximum of 2 terminal stations can be active over B-channels. Them is proposed also to connect incompletely ISDN supported terminal stations to the S0 bus, which stations have many non-ISDN supported features, there being investigated on line cards which type of terminal station is connected. On the basis of a Terminal Endpoint Identifier (TEI) in a layer-2 message, either a standard ISDN protocol is handled from layer-2 onwards, or a firm-owned protocol.
|
