| 摘要 |
<p>A telephone system has access both to a terrestrial radio telephone service 19 23 21 25 and to a satellite telephone service 3 5 13. In the event that no terrestrial service 19 23 21 25 is available, an equipment identifier 69 in the handset 1 permits the ground portion 5 13 of the satellite service to accept calls from the handset 1 and to establish a call basis, by display of questions on the handset display 35 and acceptance of responses from the handset keypad 33, if no basis already exists. The system permits more than one identifiable user per handset 1 and flexibility in establishment of the call basis. The system can use the equipment identifier 69 to recognise the style of handset and adapt its protocols accordingly. <IMAGE></p> |
