Multiplex communications – Wide area network – Packet switching
Patent
1994-11-04
1996-05-28
Hofsass, Jeffery
Multiplex communications
Wide area network
Packet switching
379347, 379410, 370 66, H04Q 1108, H04M 300
Patent
active
055219195
ABSTRACT:
A system and method to provide voice enhancement circuits on a voice path on an individual basis, without having in-line circuits inserted into the lines or trunks. The enhancement circuit is inserted within one or more of the switches. This system comprises a switching system having a switching fabric and a central control, wherein the switching fabric includes several extended time slot interchange (XTSI) units connected to a time multiplex switch. The extended time slot interchange unit has approximately twice the capacity of a standard time slot interchange unit. Such XTSI is connected to voice enhancing circuits, which the TSI may then switch enhancement circuits into a call path. A method of setting up a call according to this invention includes routing the call to a switch, routing the call in the switch into an XTSI, which routes a call through the enhancement circuit, and then back through the XTSI.
REFERENCES:
patent: 4540850 (1985-09-01), Herr et al.
patent: 4991169 (1991-02-01), Davis et al.
patent: 5195132 (1993-03-01), Bowker et al.
patent: 5313459 (1994-05-01), Matern
patent: 5388185 (1995-02-01), Terry et al.
Anderson Thomas W.
Bowers Thomas E.
Byers Charles C.
AT&T Corp.
Hofsass Jeffery
Hunter Daniel S.
Johannesen Michael B.
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