公开(公告)号：US20040246949A1

公开(公告)日：2004-12-09

申请号：US10889128

申请日：2004-07-13

Applicant: MCI WorldCom. Inc.

Inventor： Matthew J. Cannon

IPC: H04L012/28 ,  H04L012/66

CPC classification number: H04L65/104 ,  H04L29/06027 ,  H04L65/103 ,  H04L65/1083 ,  H04L69/08 ,  H04L69/16 ,  H04L69/168 ,  H04L69/169 ,  H04M7/1295 ,  H04Q3/0025

Abstract: A system for transporting public switched network (PSTN) terminated signaling across an Internet protocol (IP) network includes a gateway between the PSTN and the IP network. The gateway receives a telephony signaling message from the PSTN and determines if the telephony signaling message maps to an IP signaling message. If the telephony signaling message does not map to an IP signaling message, the gateway packages the telephony signaling message in a special IP signaling message for transport over the IP network. If the gateway receives a special IP signaling special message, the gateway unpackages the telephony signaling message from the special message for transport over the PSTN. If the gateway receives DTMF signals from the PSTN, the gateway translates the DTMF signals to digits and packages the digits in a special IP signaling message for transport over the IP network. The gateway also packages the DTMF signals in an IP media transport protocol message for transport over the IP network.

Abstract translation: 用于通过互联网协议（IP）网络传输公共交换网络（PSTN）终止信令的系统包括在PSTN和IP网络之间的网关。 网关从PSTN接收电话信令消息，并确定电话信令消息是否映射到IP信令消息。 如果电话信令消息未映射到IP信令消息，则网关将电话信令消息封装在专用IP信令消息中，以通过IP网络进行传输。 如果网关接收到特殊的IP信令特殊消息，则网关将从特殊消息中解包电话信令消息以通过PSTN传输。 如果网关从PSTN接收到DTMF信号，则网关将DTMF信号转换为数字，并将数字封装在专用IP信令消息中，以便通过IP网络进行传输。 网关还将DTMF信号封装在IP媒体传输协议消息中，以通过IP网络进行传输。

公开(公告)号：US20020057786A1

公开(公告)日：2002-05-16

申请号：US10045880

申请日：2002-01-11

Applicant: WorldCom, INC.

Inventor： Steven R. Donovan ,  Matthew J. Cannon

IPC: H04M007/00

CPC classification number: H04L65/1043 ,  H04L12/4641 ,  H04L29/06 ,  H04L29/06027 ,  H04L65/1026 ,  H04L65/103 ,  H04L65/1036 ,  H04L65/104 ,  H04L65/1069 ,  H04M3/4228 ,  H04M7/009 ,  H04M7/12 ,  H04M7/1205 ,  H04M2207/20 ,  H04M2207/35 ,  H04Q3/0029 ,  Y10S379/90 ,  Y10S379/901

Abstract: A virtual private network includes an internet protocol (IP) network and a public switched telephone network (PSTN). An enterprise gateway is operably connected to the IP network. The enterprise gateway is operably connected to a switch of the PSTN through a direct access line (DAL). The set-up signaling for virtual private network calls and the calls themselves are transported across the internet protocol network and the public switched telephone network through the direct access line.