| 摘要 |
<p>Known telecommunication devices for providing calling line identification in response to an identification signal transmitted between two rings of a ringing signal are not suitable for use in large numbers. By providing said telecommunication device with a predefined impedance to be activated or switched on during said identification signal and to be deactivated or switched off during said rings, said device operates in a better defined way which allows it being used by each one of a large number of subscribers in for example a telecommunication network. <IMAGE></p> |
