发明授权
US6157637A Transmission system of telephony circuits over a packet switching network
失效
通过分组交换网络的电话电路的传输系统
- 专利标题: Transmission system of telephony circuits over a packet switching network
- 专利标题(中): 通过分组交换网络的电话电路的传输系统
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申请号: US10004申请日: 1998-01-21
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公开(公告)号: US6157637A公开(公告)日: 2000-12-05
- 发明人: Claude Galand , Gerald Lebizay , Jean Menez , Gerard Richter
- 申请人: Claude Galand , Gerald Lebizay , Jean Menez , Gerard Richter
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 优先权: EPX97480002 20000919
- 主分类号: H04L12/70
- IPC分类号: H04L12/70 ; H04Q11/04 ; H04L12/66 ; H04B1/66 ; H04J3/00
摘要:
Process for transmitting compressed voice circuits over a packet switching network of the type comprising a plurality of switching nodes (SW-1 to SW-7) interconnected by connection lines and including at least an end switching node (SW-1) connected to a source exchange telephone device (PABX A) and another end switching node (SW-3) connected to a destination exchange telephone device (CX), and comprising the steps of receiving from the source exchange telephone device a sequence of uncompressed frames wherein each frame contains n slots containing each J bytes respectively associated to J voice circuits, compressing the data bits of each voice circuit in order to build a packet containing J compressed voice circuits, and providing this packet to the end switching node for transmission to the destination exchange telephone device.
公开/授权文献
- USD355210S Ink cartridge for printer 公开/授权日:1995-02-07