Title:
COMMUNICATION METHOD AND EQUIPMENT DYNAMICALLY REVISING COMPRESSION SYSTEM
Document Type and Number:
Japanese Patent JP3515252
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To utilize the channel effectively and to reduce the call loss by selecting or revising dynamically the voice compression system depending on the utilizing of the band of a trunk line in a synchronous or an asynchronous multiplexer (including a multiplexer with an exchange function).
SOLUTION: When the traffic of the line is a threshold or over (step 406), the compression system bringing connected calls to a state of using lower required bands is selected. A switching permission attribute is set in advance to each call and the switching permission call is selected as a switching object (step 410). A resource required for the selected compression system is reserved in a caller side and a called party (steps 412, 422). When the reservation of the resource is successful, data are sent by both the already connected resource and a newly connected resource reserved newly. After the synchronization, the resource having been used for the connected calls in released (step 420, 432).
Inventors:
Hatta, Tomoaki
Yoshimura, Kazuhisa
Takahashi, Ryoji
Yoshimura, Kazuhisa
Takahashi, Ryoji
Application Number:
JP30310795A
Publication Date:
April 05, 2004
Filing Date:
November 21, 1995
Export Citation:
Assignee:
INTERNATL BUSINESS MACH CORP <IBM>
International Classes:
H04N1/00; H04J3/16; H04M11/00; H04Q11/04; (IPC1-7): H04Q11/04; H04J3/16; H04M11/00
Attorney, Agent or Firm:
坂口 博 （外１名）
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