会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 41. 发明公开
    • METHOD FOR TRANSMITTING DNC SIGNALS TO FAX MACHINE ENSURED BY T.38 GATEWAY
    • 程序发送DNC信号到BY T.38网关安全传真机
    • EP1850578A4
    • 2008-04-30
    • EP06705593
    • 2006-01-26
    • HUAWEI TECH CO LTD
    • LI RUIHUACHEN WEI
    • H04N1/32H04N1/00
    • H04N1/00214H04N1/0022H04N2201/002
    • A method for transmitting the DNC signals to the fax machine ensured by T.38 gateway is disclosed. When the gateway is used as a tranmitting gateway: the gateway packs the DNC signals detected on the TDM side into IFP packages and transmits the packages to the IP side; then the gateway transmits the fax end event to the softswitch after a predetermined delay time so as to ensure the DCN signals are intactly transmitted to the receiving fax machine; after the fax end event is received, the softswitch sends the state switching command so that the two gateways switch back to the speech state. When the gateway is used as a receiving gateway: the gateway modulated the DCN signals which are detected on the IP side and transmits the modulated DCN signals to the receiving fax machine; if the switching command is received from the softswitch during the period of transmitting the DCN signals, then the switching process is delayed; if the gateway has not yet received the switching command from the softswitch after the transmission of the DCN signals is finished, the gateway initiatively sends the fax end event to the softswitch. The method has the advantages as follows: the fax end event is reliably detected; the DCN signals are reliably transmitted to the terminal fax machine; and the gateway is compatible with the present gateway.