| 摘要 |
PURPOSE:To obtain an effective means for repair of a PKG by providing an exchange switch in parallel with a test switch, accommodating a subscriber loading-in device of a subscriber circuit to one and accommodating a standby exchange PKG to the other to changeover the exchange to the PKG being an object of exchange. CONSTITUTION:The subscriber leading-in switch is connected to the standby exchange PKG via an exchange switch and the subscriber line is changed over from an SLICP 0 being a faulty PKG into the standby exchange PKG by activating switches t00-t03, t1. Thus, even when the SLICP 0 is removed, no effect is exerted entirely on a normal cell. After the SLICP 0 is exchanged with a normal SLICPKG, the switches are turned off, then the PKG exchange is applied without giving any effect to a talking of other subscriber circuit. The similar exchange is applied to other SLICPKG. |
