Network termination enabling relief of call congestion in an exc

Details Network termination enabling relief of call congestion in an exc Network termination enabling relief of call congestion in an exc

1991-04-10

1993-07-27

Kuntz, Curtis

Multiplex communications

Wide area network

Packet switching

370 941, H04Q 1104

Patent

active

052316300

ABSTRACT:
In a network termination connected to an exchanger and a plurality of terminal adaptors, and enabling relief of call congestion in an exchanger, the network termination includes: a reception port for receiving a reduction rate indicated by a congestion information area in a SDH frame input from the exchanger; a SDH frame transmission unit for transferring the SDH frame including a plurality of ATM cells, each ATM cell having a header field and an information field, and the header field having a busy bit field; an unusable cell preparation unit operatively connected to the SDH frame transmission unit for generating the ATM cell train including the unusable cells defined based on the reduction rate from the exchanger; and a transmission port operatively connected to the unusable cell preparation unit for transferring the ATM cell train including the unusable cells to the end terminals.

REFERENCES:
patent: 5067127 (1991-11-01), Ochiai
"Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria, A Module of TSGR, TR-TSY-000440", Technical Reference TR-TSY-000253, Issue 1, Sep. 1989, Bellcore.
"Recommendations Drafted by Working Party XVIII/8 (General B-ISDN Aspects) to be Approved in 1990", Study Group XVIII (Geneva Meeting, May 23-25, 1990), International Telegraph and Telephone Consultative Committee (CCITT), COM XVIII-R 34-E Jun. 1990.

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