System to interconnect subscriber lines to a telephone automatic

Details System to interconnect subscriber lines to a telephone automatic System to interconnect subscriber lines to a telephone automatic

1981-11-12

1983-11-22

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370112, H04Q 1104

Patent

active

044173334

ABSTRACT:
A system to interconnect subscriber lines to a telephone automatic time division switch.
The system comprises, on the subscriber lines side, interconnection apparatus (HAi) and, on the automatic switching side, interconnection units (HUi), which are connected by high bit rate links (HBRLi). Each HAi is associated with the 112 lines of a cable and has, for each subscriber line, an individual subscriber apparatus with an A/D and D/A converter whose digital output is connected to an outgoing multiplex and the digital input to an incoming multiplex, forming a PCM multiplex.
An HAi comprises a multiplexor (30i), a multiplexor (31i) to which are connected seven PCMs, on one side, and a first link of 34 Mbit/s on the other, and a multiplexor (32i) to which is connected, on one side, the first link of multiplexor (30i) and a second link at 34 Mbit/s from the neighboring interconnection apparatus (HA(i-1)), and, on the other side, a third 34 Mbit/s link which is connected by transmission and reception system (33i), to a link (HBRLi). A coupler (34i) is set up between the multiplexor link (31i) and a second link to the multiplexor (32(i+1)). A unit (HAi) presents an analog structure through link (HBRLi).

REFERENCES:
patent: 4025725 (1977-05-01), Euler
patent: 4152543 (1979-05-01), Prudhov et al.
International Symposium on Subscriber Loops and Services; Munich, Sep. 15-19, 1980; Proceedings, pp. 94-97.
"Communication & Transmission"; vol. 1, No. 1, Sep. 1979, Paris, pp. 87-102.

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