Transmitting/receiving system having digital switching network
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United States of America Patent
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Jun 7, 1994
Issued Date -
N/A
app pub date -
Feb 10, 1993
filing date -
Feb 27, 1990
priority date (Note) -
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Abstract
Transmitting/receiving system includes a plurality of analog junction lines and analog tie trunks provided at two ends of the analog junction lines. The PBX is provided with an analog junction line-ISDN converting unit. The analog junction line-ISDN converting unit is operative to transfer B-channel signals on a first analog junction line through the PBX network and the analog tie trunks and to transfer D-channel signals on a second analog junction line.
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