| 摘要 |
PURPOSE:To transmit assuredly information without reducing the transmission capacity of a data signal by compensating an inter-station control signal with an inter-terminal control signal which is transmitted by a frame preceding or following the inter-station control signal by a prescribed number of frames and at the juncture with a digital exchange. CONSTITUTION:An inter-station control signal OS transmitted by a bit b8 of a frame F(m) of each of channels CHi (i=1-24) is compensated by an inter-terminal control signal TS' transmitted by the bit b8 of a frame F(m-1) preceding the frame F(m) by a frame and held at a buffer Bi for inter-terminal holding. The signal OS is transmitted to a digital exchange via a data speed converting circuit DVTi. Therefore if an inter-terminal control signal TS has a level change in the F(m), the effect of the signal OS is deleted for each section of a digital junction line DPV just by delaying the changing time point of the level of the signal TS up to the next frame F(m+1). |
