EXTENSION OF A LOCAL AREA PHONE SYSTEM TO A WIDE AREA NETWORK WITH HANDOFF FEATURE
    9.
    发明申请
    EXTENSION OF A LOCAL AREA PHONE SYSTEM TO A WIDE AREA NETWORK WITH HANDOFF FEATURE 审中-公开
    将本地区域电话系统扩展到具有手动功能的宽域网络

    公开(公告)号:US20120069754A1

    公开(公告)日:2012-03-22

    申请号:US13182435

    申请日:2011-07-13

    摘要: A soft switch 134 providing wireless PBX voice services to a local area network (WLAN) is used to extend PBX functionality to the cellular domain. A dual mode remote unit is capable of receiving signals both in the cellular system as well as the WLAN. The cellular system is comprised of a data-bearing path and a voice-bearing path. When the dual mode remote unit is within the WLAN, it communicates both voice over IP (VoIP) signaling as well as session initiation protocol (SIP) control signaling over the WLAN. When the remote unit is outside the WLAN, it communicates voice signaling over the voice-bearing path of the cellular network using a standard cellular voice channel. In parallel, it uses the data-bearing path of the cellular network to transmit SIP control signaling.

    摘要翻译: 使用向局域网(WLAN)提供无线PBX语音服务的软交换机134来将PBX功能扩展到蜂窝域。 双模式远程单元能够在蜂窝系统以及WLAN中接收信号。 蜂窝系统由数据承载路径和语音路径组成。 当双模式远程单元在WLAN内时,它通过WLAN传送IP语音(VoIP)信令以及会话发起协议(SIP)控制信令。 当远程单元在WLAN外部时,它使用标准蜂窝语音信道在蜂窝网络的语音承载路径上传送话音信令。 并行地,它使用蜂窝网络的数据承载路径来发送SIP控制信令。