| 摘要 |
PURPOSE:To test a packet without impairing economy by providing a test transmission means and a reception check means to a subscriber signal processor, providing a direct operation path in a D-channel frame handier and setting a loopback operation path in a time switch. CONSTITUTION:A test transmission section 141 sends a test use packet frame FPT subject to frame multiplex to a D-channel frame handier 13 via a frame check section 142 by a command from a controller and to a time switch 11 via a signal line 106 and to a multiplexer/demultiplexer section 12 in an FHB 12 via a signal line 104. A demultiplexer section 122 converts the FPT into a B channel packet frame FBPT through an address conversion section 121 and a signal line 103 and sends the converted frame to a switch 11. The FBPT is converted into the frame FPT by the conversion section 121 via a loopback signal line 115, a signal path 116 and the signal line 103, the demultiplexer section 122 multiplexes the frame and it is fed to a check section 143 via a SW11, a signal path 117, the signal line 106, an FHD 13 and the signal line 107 and tested in the section 143. |
