PRIVATE CIRCUIT PROVISION IN A TELECOMMUNICATIONS NETWORK

摘要

A telecommunications network includes local switches (14, 15, 16) main switches (10 to 13) and access lines (20 to 21). A switching unit (25) which takes the form of a computer with switching capability is connected to the local switch (16) on a (30) channel ISDN link. In order to form a private circuit between an access line (20) and an access line (21) the following operations are performed. At local switches (14, 15), access lines (20, 21) are physically connected to free local switch lines. At each of the local switches, an engineer uses the free local switch line which has just been connected to an access line to make a call to the switching unit (25). The switching unit (25) captures the CLI of this local switch line. The engineer then enters an identifier for the private circuit which is to be formed and instructs the switching unit (25) to form a private circuit. The switching unit (25) then calls these two free local switch lines and then forms the private circuit by connecting the local switch lines together within itself.