標題: | Method and apparatus for telephone routing between PTN and PSTN |
作者: | Chang, Ming-Feng Lin, Yi-Bing Liang, Ching-Feng |
公開日期: | 31-五月-2007 |
摘要: | Disclosed is a method and apparatus applicable to an interface between PSTN and PTN for telephone routing. The interface includes a branch switch, a key system, a network branch switch, and media gateway, etc. The telephone routing method and apparatus of the present invention creates, maintains, and utilizes a call-back routing table to enable a specified PSTN user to call the callback external leased line to reach a specified PTN user in a one-stage dialing manner. The process of one-stage dialing includes PTN call origination to PSTN, PSTN call origination to PTN, and callback tag insertion in the call-back routing table. The call-back routing table consists of a plurality of call-back tags. Each call-back tag consists of at least a data triple, i.e. PTN user identifier, PSTN called party telephone number, and callback leased line identifier. |
官方說明文件#: | H04L012/58 H04M001/725 H04Q007/22 |
URI: | http://hdl.handle.net/11536/105654 |
專利國: | USA |
專利號碼: | 20070123218 |
顯示於類別: | 專利資料 |