| 摘要 |
PURPOSE:To enable a transfer from the extension mutual connection to the extension and the main wire for the automatic private telephone exchange device, by detecting the transfer requests of both the calling and called sides for the mutual extension trunk and then drawing the call line into the transfer trank or the position outgoing trunk by the detection output. CONSTITUTION:The detecting means is provided to mutual extension trunk SIOT to detect the transfer request of calling-side STAA and B plus called-side STAB and A respectively, and the channel is provided between trunk SIOT and special transfer link STFL. The channel is switched by the detection output of trunk SIOT, and an acquisition is given for trunk STFT or special position outgoing trunk SPOT from trunk SIOT via link STFT. In case trunk STFL is acquired, the lead of the STF side is used; and operator link OPL and position unit POSU are used in case trunk SPOT is acquired respectively. Thus, a connection is given to line link frame LLF to perform a transfer to the extension and the main wire. |
