| 摘要 |
PCT No. PCT/FI83/00038 Sec. 371 Date Dec. 23, 1983 Sec. 102(e) Date Dec. 23, 1983 PCT Filed Apr. 29, 1983 PCT Pub. No. WO83/03937 PCT Pub. Date Nov. 10, 1983.The invention relates to a digital multiplex device for branching a digital information stream. In relatively small individual telephone networks using digital transmission techniques and comprising a few intermediate stations and terminal stations, a need has arisen to branch groups having less than 30 channels. To branch such groups in a digital manner, i.e., without first decoding the signals to voice-frequency signals, a phase compensating device includes four switches, four time multiplexers, and two frame phasers and two control units for controlling the switches and time multiplexers. The device comprises two identical units, and is suitable for branching other digital information, besides data signals having a standard frame structure. Moreover, the transmission rate of the branched line may differ from that of the main line by using a rate modifier. |
