| 摘要 |
<p>An ISDN Satellite Switch (ISS) is disposed between ISDN user equipment (e.g., an ISDN PBX) and a satellite network, to extract and process the ISDN signalling information originated from the ISDN user equipment, allocate an appropriate satellite capacity for the user service request, generate signalling response messages to the originating user, generate messages to be transmitted over a satellite signalling channel to corresponding ISS (14) connected to the destination user, and provide an appropriate Protocol Conversion Function (PCF), when necessary for a certain class of data protocols. A destination ISS (14), after receipt of these messages, generates ISDN incoming call signalling messages to be sent to the called user.</p> |
