| 摘要 |
A utility meter or other fixed device is assigned a permanent dialed number that is unrelated to the telephone number of the customer premise where t he device is located. Instead, the dialed number is permanently assigned to a line termination location in the switch such that when the dialed number is dialed a connection is made to the line terminated at that physical location in the netwo rk switching system irrespective of the customer's telephone number. As a result, t he number dialed by the calling party is unrelated to the customer's telephone numb er such that changes in a customer's telephone number do not affect the telemetry system. Moreover, the telemetry number could be selected from a specified range of numbers or could include a predetermined command digit such as *8 prior to the number string. As a result, the switching system is able to identify that the re quest is for a special service such as telemetry connection by the dialed telemetry numbe r rather than by the trunk on which the call is received. Thus, the availability o f the service will not depend on access to specialized trunks.
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