| 摘要 |
<p>The basic idea of the invention is to exploit the mobile phone and the control apparatus controlling the phone already installed in the radio network. An example of such phones are the phones installed in the radio repeaters. According to the invention, the mobile phone of the radio repeater is used to both receive and make test calls. The controlling apparatus in the radio repeater is configured to make a test call to another repeater in response to having received a test call. These consecutive test calls form a test chain. A repeater can belong to a plurality of test chains. In this embodiment, the repeater belonging to a plurality of test chains is given a list of test phone numbers, i.e. a phone number of a radio repeater for every chain. The chains are distinguished by phone numbers or other identifiers of the preceding repeater in the chain.</p> |
